Uncaught exception error! Simple document app - iphone

Removed the colon which wasn't supposed to be there since my selector doesn't have one. It fixed it, then this problem occurred:
2012-06-02 22:33:10.083 TinyPix[10433:fb03] load OK
2012-06-02 22:33:10.084 TinyPix[10433:fb03] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<BIDTinyPixDocument 0x6e665a0> valueForUndefinedKey:]: this class is not key value coding-compliant for the key timeStamp.'
*** First throw call stack:
(0x16b0022 0x1841cd6 0x16afee1 0x9c8efe 0x937831 0x936c99 0x5f47 0x5e77 0x93af30 0x93aedb 0x59ed 0x4546e3 0x40778d9 0x4078509 0x15e7803 0x15e6d84 0x15e6c9b 0x15997d8 0x159988a 0x1b626 0x2a5d 0x29c5)
terminate called throwing an exception
Here's my detail file: I'm getting a SIGABRT error on the self.detailDescriptionLabel.text line. Don't know what's going on.
#import "BIDDetailViewController.h"
#interface BIDDetailViewController ()
- (void)configureView;
#end
#implementation BIDDetailViewController
#synthesize detailItem = _detailItem;
#synthesize detailDescriptionLabel = _detailDescriptionLabel;
#pragma mark - Managing the detail item
- (void)setDetailItem:(id)newDetailItem
{
if (_detailItem != newDetailItem) {
_detailItem = newDetailItem;
// Update the view.
[self configureView];
}
}
- (void)configureView
{
// Update the user interface for the detail item.
if (self.detailItem) {
self.detailDescriptionLabel.text = [[self.detailItem valueForKey:#"timeStamp"] description];
}
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self configureView];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
self.detailDescriptionLabel = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
#end
Here's my file:
#import "BIDMasterViewController.h"
#import "BIDTinyPixDocument.h"
#import "BIDDetailViewController.h"
#interface BIDMasterViewController () <UIAlertViewDelegate>
#property (strong, nonatomic) NSArray *documentFilenames;
#property (strong, nonatomic) BIDTinyPixDocument *chosenDocument;
-(NSURL *)urlForFilename:(NSString *)filename;
-(void)reloadFiles;
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath;
#end
#implementation BIDMasterViewController
#synthesize colorControl;
#synthesize documentFilenames;
#synthesize chosenDocument;
#synthesize fetchedResultsController = __fetchedResultsController;
#synthesize managedObjectContext = __managedObjectContext;
- (void)awakeFromNib
{
[super awakeFromNib];
}
-(void)viewWillAppear:(BOOL)animated;
{
[super viewWillAppear:animated];
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSInteger selectedColorIndex = [prefs integerForKey:#"selectedColorIndex"];
self.colorControl.selectedSegmentIndex = selectedColorIndex;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.navigationItem.leftBarButtonItem = self.editButtonItem;
UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(insertNewObject:)];
self.navigationItem.rightBarButtonItem = addButton;
[self reloadFiles];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
- (void)insertNewObject
{
// get the name
UIAlertView *alert =
[[UIAlertView alloc] initWithTitle:#"Filename"
message:#"Enter a name for your new TinyPix document."
delegate:self
cancelButtonTitle:#"Cancel"
otherButtonTitles:#"Create", nil];
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
[alert show];
}
#pragma mark - Table View
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
[context deleteObject:[self.fetchedResultsController objectAtIndexPath:indexPath]];
NSError *error = nil;
if (![context save:&error]) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
}
}
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// The table view should not be re-orderable.
return NO;
}
#pragma mark - Fetched results controller
- (NSFetchedResultsController *)fetchedResultsController
{
if (__fetchedResultsController != nil) {
return __fetchedResultsController;
}
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Edit the entity name as appropriate.
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Event" inManagedObjectContext:self.managedObjectContext];
[fetchRequest setEntity:entity];
// Set the batch size to a suitable number.
[fetchRequest setFetchBatchSize:20];
// Edit the sort key as appropriate.
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"timeStamp" ascending:NO];
NSArray *sortDescriptors = [NSArray arrayWithObjects:sortDescriptor, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
// Edit the section name key path and cache name if appropriate.
// nil for section name key path means "no sections".
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:#"Master"];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
NSError *error = nil;
if (![self.fetchedResultsController performFetch:&error]) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
return __fetchedResultsController;
}
- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller
{
[self.tableView beginUpdates];
}
- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo
atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type
{
switch(type) {
case NSFetchedResultsChangeInsert:
[self.tableView insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[self.tableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject
atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type
newIndexPath:(NSIndexPath *)newIndexPath
{
UITableView *tableView = self.tableView;
switch(type) {
case NSFetchedResultsChangeInsert:
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeUpdate:
[self configureCell:[tableView cellForRowAtIndexPath:indexPath] atIndexPath:indexPath];
break;
case NSFetchedResultsChangeMove:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath]withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
[self.tableView endUpdates];
}
/*
// Implementing the above methods to update the table view in response to individual changes may have performance implications if a large number of changes are made simultaneously. If this proves to be an issue, you can instead just implement controllerDidChangeContent: which notifies the delegate that all section and object changes have been processed.
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
// In the simplest, most efficient, case, reload the table view.
[self.tableView reloadData];
}
*/
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath
{
NSManagedObject *object = [self.fetchedResultsController objectAtIndexPath:indexPath];
cell.textLabel.text = [[object valueForKey:#"timeStamp"] description];
}
-(NSURL *)urlForFilename:(NSString *)filename {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentDirectory stringByAppendingPathComponent:filename];
NSURL *url = [NSURL fileURLWithPath:filePath];
return url;
}
-(void)reloadFiles {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *path = [paths objectAtIndex:0];
NSFileManager *fm = [NSFileManager defaultManager];
NSError *dirError;
NSArray *files = [fm contentsOfDirectoryAtPath:path error:&dirError];
if (!files) {
NSLog(#"Encountered error while trying to list files in directory %#: %#", path, dirError);
}
NSLog(#"found files: %#", files);
files = [files sortedArrayUsingComparator:^NSComparisonResult(id filename1, id filename2) {
NSDictionary *attr1 = [fm attributesOfItemAtPath:[path stringByAppendingPathComponent:filename1]
error:nil];
NSDictionary *attr2 = [fm attributesOfItemAtPath:[path stringByAppendingPathComponent:filename2]
error:nil];
return [[attr2 objectForKey:NSFileCreationDate] compare:[attr1 objectForKey:NSFileCreationDate]];
}];
self.documentFilenames = files;
[self.tableView reloadData];
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.documentFilenames count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"FileCell"];
NSString *path = [self.documentFilenames objectAtIndex:indexPath.row];
cell.textLabel.text = path.lastPathComponent.stringByDeletingPathExtension;
return cell;
}
-(IBAction)chooseColor:(id)sender {
NSInteger selectedColorIndex = [(UISegmentedControl *)sender selectedSegmentIndex];
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
[prefs setInteger:selectedColorIndex forKey:#"selectedColorIndex"];
}
-(void)alertView:(UIAlertView *)alertView
didDismissWithButtonIndex:(NSInteger)buttonIndex {
if (buttonIndex == 1) {
NSString *filename = [NSString stringWithFormat:#"%#.tinypix",
[alertView textFieldAtIndex:0].text];
NSURL *saveUrl = [self urlForFilename:filename];
self.chosenDocument = [[BIDTinyPixDocument alloc] initWithFileURL:saveUrl];
[chosenDocument saveToURL:saveUrl
forSaveOperation:UIDocumentSaveForCreating
completionHandler:^(BOOL success) {
if (success) {
NSLog(#"save OK");
[self reloadFiles];
[self performSegueWithIdentifier:#"masterToDetail"
sender:self];
} else {
NSLog(#"failed to save!");
}
}];
}
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if (sender == self) {
// if sender == self, a new document has just been created,
// and chosenDocument is already set.
UIViewController *destination = segue.destinationViewController;
if ([destination respondsToSelector:#selector(setDetailItem:)]) {
[destination setValue:self.chosenDocument forKey:#"detailItem"];
}
}else {
// find the chose document from the tableview
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
NSString *filename = [documentFilenames objectAtIndex:indexPath.row];
NSURL *docUrl = [self urlForFilename:filename];
self.chosenDocument = [[BIDTinyPixDocument alloc] initWithFileURL:docUrl];
[self.chosenDocument openWithCompletionHandler:^(BOOL success) {
if (success) {
NSLog(#"load OK");
UIViewController *destination = segue.destinationViewController;
if ([destination respondsToSelector:#selector(setDetailItem:)]) {
[destination setValue:self.chosenDocument forKey:#"detailItem"];
}
}else {
NSLog(#"failed to load!");
}
}];
}
}
#end

You specify the selector as insertNewObject: and the colon on the end says that it takes one parameter. The insertNewObject method you implemented takes no parameters and, to Objective-C, that makes it a different thing and it can't find the one parameter method.
You should change your implementation to - (IBAction)insertNewObject:(id)sender {...} to match #selector(insertNewObject:).

Related

'+entityForName: nil is not a legal NSManagedObjectContext

I am getting an error when I am trying to load my data from Core Data to a Table View controller. I believe this is due to the managedObject not being passed down correctly.
But I believe I did so after some research with the code in the AppDelegate.m under didFinishLaunchingWithOptions.
error
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+entityForName: nil is not a legal NSManagedObjectContext parameter searching for entity name 'Club''
MLVAPPDelegate.h
#import <UIKit/UIKit.h>
#interface MLVAppDelegate : UIResponder <UIApplicationDelegate>
#property (strong, nonatomic) UIWindow *window;
#property (readonly, strong, nonatomic) NSManagedObjectContext *managedObjectContext;
#property (readonly, strong, nonatomic) NSManagedObjectModel *managedObjectModel;
#property (readonly, strong, nonatomic) NSPersistentStoreCoordinator *persistentStoreCoordinator;
#end
MLVAppDelegate.m
#import "MLVAppDelegate.h"
#import "MLVSyncEngine.h"
#import "Club.h"
#import "IronSet.h"
#import "MLVClubSelectionViewController.h"
#implementation MLVAppDelegate
#synthesize managedObjectContext = _managedObjectContext;
#synthesize managedObjectModel = _managedObjectModel;
#synthesize persistentStoreCoordinator = _persistentStoreCoordinator;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
UITabBarController *tabController = (UITabBarController *)self.window.rootViewController;
UINavigationController *navigationController = (UINavigationController *)[[tabController viewControllers] objectAtIndex:0];
MLVClubSelectionViewController *controller = (MLVClubSelectionViewController *)[[navigationController viewControllers] objectAtIndex:0];
controller.managedObjectContext = self.managedObjectContext;
[[MLVSyncEngine sharedEngine] registerNSManagedObjectClassToSync:[Club class]];
[[MLVSyncEngine sharedEngine] registerNSManagedObjectClassToSync:[IronSet class]];
return YES;
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
[[MLVSyncEngine sharedEngine] startSync];
}
- (NSManagedObjectContext *)masterManagedObjectContext {
if (_managedObjectContext != nil) {
return _managedObjectContext;
}
NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];
if (coordinator != nil) {
_managedObjectContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
[_managedObjectContext performBlockAndWait:^{
[_managedObjectContext setPersistentStoreCoordinator:coordinator];
}];
}
return _managedObjectContext;
}
- (NSManagedObjectModel *)managedObjectModel
{
if (_managedObjectModel != nil) {
return _managedObjectModel;
}
NSURL *modelURL = [[NSBundle mainBundle] URLForResource:#"GolfCalculator" withExtension:#"momd"];
_managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];
return _managedObjectModel;
}
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{
if (_persistentStoreCoordinator != nil) {
return _persistentStoreCoordinator;
}
NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:#"GolfCalculator.sqlite"];
NSError *error = nil;
_persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error]) {
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
return _persistentStoreCoordinator;
}
#pragma mark - Application's Documents directory
// Returns the URL to the application's Documents directory.
- (NSURL *)applicationDocumentsDirectory
{
return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
}
#end
MLVClubSelectionViewController.h
#import <UIKit/UIKit.h>
#interface MLVClubSelectionViewController : UITableViewController
#property (nonatomic, strong) NSManagedObjectContext *managedObjectContext;
#property (nonatomic, retain) NSFetchedResultsController *fetchedResultsController;
#end
MLVClubSelectionViewController.m
#import "MLVClubSelectionViewController.h"
#import "Club.h"
#import "IronSet.h"
#import "MLVCoreDataController.h"
#interface MLVClubSelectionViewController ()
#end
#implementation MLVClubSelectionViewController
#synthesize managedObjectContext;
#synthesize fetchedResultsController = _fetchedResultsController;
- (void)viewDidLoad
{
[super viewDidLoad];
NSError *error;
if (![[self fetchedResultsController] performFetch:&error]) {
// Update to handle the error appropriately.
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
exit(-1); // Fail
}
self.title = #"Club Selection";
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
#warning Potentially incomplete method implementation.
// Return the number of sections.
return 0;
}
- (NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section {
id sectionInfo =
[[_fetchedResultsController sections] objectAtIndex:section];
return [sectionInfo numberOfObjects];
}
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath {
Club *info = [_fetchedResultsController objectAtIndexPath:indexPath];
cell.textLabel.text = info.fullTitle;
cell.detailTextLabel.text = [NSString stringWithFormat:#"%#, %#",
info.model, info.level];
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell =
[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
// Set up the cell...
[self configureCell:cell atIndexPath:indexPath];
return cell;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
}
#pragma mark - Fetched Results
- (NSFetchedResultsController *)fetchedResultsController {
if (_fetchedResultsController != nil) {
return _fetchedResultsController;
}
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription
entityForName:#"Club" inManagedObjectContext:managedObjectContext];
[fetchRequest setEntity:entity];
NSSortDescriptor *sort = [[NSSortDescriptor alloc]
initWithKey:#"make" ascending:NO];
[fetchRequest setSortDescriptors:[NSArray arrayWithObject:sort]];
[fetchRequest setFetchBatchSize:20];
NSFetchedResultsController *theFetchedResultsController =
[[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest
managedObjectContext:managedObjectContext sectionNameKeyPath:nil
cacheName:#"Root"];
self.fetchedResultsController = theFetchedResultsController;
_fetchedResultsController.delegate = self;
return _fetchedResultsController;
}
- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller {
// The fetch controller is about to start sending change notifications, so prepare the table view for updates.
[self.tableView beginUpdates];
}
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type newIndexPath:(NSIndexPath *)newIndexPath {
UITableView *tableView = self.tableView;
switch(type) {
case NSFetchedResultsChangeInsert:
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeUpdate:
[self configureCell:[tableView cellForRowAtIndexPath:indexPath] atIndexPath:indexPath];
break;
case NSFetchedResultsChangeMove:
[tableView deleteRowsAtIndexPaths:[NSArray
arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[tableView insertRowsAtIndexPaths:[NSArray
arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id )sectionInfo atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type {
switch(type) {
case NSFetchedResultsChangeInsert:
[self.tableView insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[self.tableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller {
// The fetch controller has sent all current change notifications, so tell the table view to process all updates.
[self.tableView endUpdates];
}
- (void)viewDidUnload {
self.fetchedResultsController = nil;
}
#end
You have implemented the method masterManagedObjectContext, yet you never call it. You are instead assigning the value of the managedObjectContext property (which, as all object properties, will be initialized to nil), as the context passed to your controller.
You could do one of the following:
Rename masterManagedObjectContext to managedObjectContext, which will provide a lazily-loaded implementation of the managedObjectContext accessor (meaning that self.managedObjectContext should no longer evaluate to nil)
You could alternatively implement managedObjectContext as follows:
- (NSManagedObjectContext *)managedObjectContext {
return [self masterManagedObjectContext];
}
Remove the managedObjectContext property from the app delegate and only use the masterManagedObjectContext method. This will also require explicitly defining the _managedObjectContext instance variable.

table cell showing up in wrong section in table view

DataModel.h code file
#import "DataModel.h"
#import <CoreData/CoreData.h>
#import "SettingsEntity.h"
#import "Constants.h"
#implementation DataModel
NSManagedObjectContext *managedObjectContextEntity;
NSManagedObjectContext *managedObjectContextMessage;
NSManagedObjectModel *managedObjectModel;
NSPersistentStoreCoordinator *persistentStoreCoordinator;
NSEntityDescription *theSettingsEntity;
NSEntityDescription *theMessagesEntity;
-(id) init
{
NSURL *modelURL = [[NSBundle mainBundle] URLForResource:#"SOW" withExtension:#"momd"];
managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];
NSError *error = nil;
NSURL *storeURL = [[[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject] URLByAppendingPathComponent:[Constants SQLLiteDB]];
persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:managedObjectModel];
if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error]) {
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
if (persistentStoreCoordinator != nil) {
managedObjectContextEntity = [[NSManagedObjectContext alloc] init];
[managedObjectContextEntity setPersistentStoreCoordinator:persistentStoreCoordinator];
managedObjectContextMessage = [[NSManagedObjectContext alloc] init];
[managedObjectContextMessage setPersistentStoreCoordinator:persistentStoreCoordinator];
}
theSettingsEntity = [NSEntityDescription entityForName:#"SettingsEntity" inManagedObjectContext:managedObjectContextEntity];
theMessagesEntity = [NSEntityDescription entityForName:#"MessageEntity" inManagedObjectContext:managedObjectContextMessage];
return self;
}
-(void) SaveSetting: (SettingsEntity *)setting
{
NSError *error = nil;
if (managedObjectContextEntity != nil) {
if ([managedObjectContextEntity hasChanges] && ![managedObjectContextEntity save:&error]) {
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Confirmation" message:#"Settings were saved successfully." delegate:nil cancelButtonTitle:#"Okay" otherButtonTitles:nil, nil];
[alert show];
}
}
}
-(void) SaveMessage: (MessageEntity *)message
{
NSError *error = nil;
if (managedObjectContextMessage != nil) {
if ([managedObjectContextMessage hasChanges] && ![managedObjectContextMessage save:&error]) {
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
}
}
-(NSArray *) GetSettingsResult
{
NSManagedObjectContext *context = managedObjectContextEntity;
NSFetchRequest *request = [[NSFetchRequest alloc] init];
[request setEntity:theSettingsEntity];
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"enteredDateTime" ascending:NO];
NSArray *sortDescriptors = [NSArray arrayWithObjects:sortDescriptor, nil];
[request setSortDescriptors:sortDescriptors];
NSArray *results = [context executeFetchRequest:request error:nil];
return results;
}
-(SettingsEntity *) GetSettingsEntity
{
SettingsEntity *settingsEntity = [NSEntityDescription
insertNewObjectForEntityForName:[theSettingsEntity name]
inManagedObjectContext:managedObjectContextEntity];
return settingsEntity;
}
-(NSArray *) GetMessageResult
{
NSFetchRequest *request = [self GetMessageFetchRequest];
NSArray *results = [managedObjectContextMessage executeFetchRequest:request error:nil];
return results;
}
-(NSFetchRequest *) GetMessageFetchRequest
{
NSFetchRequest *request = [[NSFetchRequest alloc] init];
[request setEntity:theMessagesEntity];
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"sentDateTime" ascending:NO];
NSArray *sortDescriptors = [NSArray arrayWithObjects:sortDescriptor, nil];
[request setSortDescriptors:sortDescriptors];
return request;
}
-(NSFetchedResultsController *) GetMessageFetchResultsController
{
NSFetchRequest *fetchRequest = [self GetMessageFetchRequest];
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContextMessage sectionNameKeyPath:#"typeMessage" cacheName:nil];
return aFetchedResultsController;
}
-(MessageEntity *) GetMessageEntity
{
MessageEntity *mEntity = [NSEntityDescription
insertNewObjectForEntityForName:[theMessagesEntity name]
inManagedObjectContext:managedObjectContextMessage];
return mEntity;
}
#end
HistoryTableView code file is as follows:
#import "HistoryTableViewController.h"
#import "MessageEntity.h"
#import "DataModel.h"
#import "HistoryDetailViewController.h"
#import "Constants.h"
#interface HistoryTableViewController ()
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath;
#end
#implementation HistoryTableViewController
//todo: zulfiqar review this line of code.
#synthesize fetchedResultsController = __fetchedResultsController;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)awakeFromNib
{
[super awakeFromNib];
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.rightBarButtonItem = self.editButtonItem;
//todo: get fetched controller here.. and reuse it every where in rest of this class.
}
/* faisal code starts here */
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
NSFetchedResultsController *c = [self fetchedResultsController];
NSArray *titles = [c sectionIndexTitles];
NSString *title = titles[section];
if ([title isEqualToString:#"E"])
{
return [Constants Email];
}
else if([title isEqualToString:#"T"])
{
return [Constants Text];
}
else
{
return [Constants Call];
}
}
- (NSArray *)sectionIndexTitlesForTableView: (UITableView *)aTableView
{
NSFetchedResultsController *c = [self fetchedResultsController];
return [c sectionIndexTitles];
}
-(NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSFetchedResultsController *c = [self fetchedResultsController];
id<NSFetchedResultsSectionInfo> sectionInfo = c.sections[section];
return sectionInfo.numberOfObjects;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
NSFetchedResultsController *c = [self fetchedResultsController];
return c.sections.count;
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
NSIndexPath *path = self.tableView.indexPathForSelectedRow;
HistoryDetailViewController *hdvc = segue.destinationViewController;
NSFetchedResultsController *c = [self fetchedResultsController];
MessageEntity *message = (MessageEntity *)[c objectAtIndexPath:path];
hdvc.currentMessageEntity = message;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Table view data source
/*
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSFetchedResultsController *c = [self fetchedResultsController];
id <NSFetchedResultsSectionInfo> sectionInfo = c.sections[section];
return sectionInfo.numberOfObjects;
}
*/
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSFetchedResultsController *c = [self fetchedResultsController];
NSString *CellIdentifier = [NSString stringWithFormat:#"Cell"];// %d_%d",indexPath.section,indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
MessageEntity *message = (MessageEntity *)[c objectAtIndexPath:indexPath];
cell.textLabel.text = message.typeMessage;
return cell;
/*
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"EEE. MMM. dd, yyyy HH:mm"];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:indexPath];
NSFetchedResultsController *c = [self fetchedResultsController];
MessageEntity *message = (MessageEntity *)[c objectAtIndexPath:indexPath];
NSString *sentDateTime = [dateFormat stringFromDate:message.sentDateTime];
NSString *contactAdd;
NSLog(message.typeMessage);
if ([message.typeMessage isEqualToString:[Constants Email]])
{
contactAdd = message.toEmailAddress;
}
else
{
NSString *unformatted = message.toPhoneNumber;
NSArray *stringComponents = [NSArray arrayWithObjects:[unformatted substringWithRange:NSMakeRange(0, 3)],
[unformatted substringWithRange:NSMakeRange(3, 3)],
[unformatted substringWithRange:NSMakeRange(6, [unformatted length]-6)], nil];
contactAdd = [NSString stringWithFormat:#"(%#) %#-%#", [stringComponents objectAtIndex:0], [stringComponents objectAtIndex:1], [stringComponents objectAtIndex:2]];
}
NSString *header = [[NSString alloc] initWithFormat:#"%#",contactAdd];
NSString *detail = [[NSString alloc] initWithFormat:#"%# on %#", message.sentName, sentDateTime];
cell.detailTextLabel.text = detail;
cell.textLabel.text = header;
return cell;
*/
}
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
NSFetchedResultsController *c = [self fetchedResultsController];
NSManagedObject *object = [c objectAtIndexPath:indexPath];
NSManagedObjectContext *context = self.fetchedResultsController.managedObjectContext;
[context deleteObject:object];
NSError *error = nil;
if (![context save:&error]) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
}
}
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// The table view should not be re-orderable.
return NO;
}
- (void)tableView:(UITableView *)tableView didEndEditingRowAtIndexPath:(NSIndexPath *)indexPath {
[tableView reloadData];
}
- (NSFetchedResultsController *)fetchedResultsController
{
if (__fetchedResultsController != nil) {
return __fetchedResultsController;
}
DataModel *data = [[DataModel alloc]init];
NSFetchedResultsController *aFetchedResultsController = [data GetMessageFetchResultsController];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
NSError *error = nil;
if (![self.fetchedResultsController performFetch:&error]) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
return __fetchedResultsController;
}
- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller
{
[self.tableView beginUpdates];
}
- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo
atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type
{
switch(type) {
case NSFetchedResultsChangeDelete:
[self.tableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject
atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type
newIndexPath:(NSIndexPath *)newIndexPath
{
UITableView *tableView = self.tableView;
switch(type) {
case NSFetchedResultsChangeDelete:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
[self.tableView endUpdates];
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Navigation logic may go here. Create and push another view controller.
/*
<#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:#"<#Nib name#>" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
*/
}
#end
My history table view looks as follows:
**Q. Why Email and Call are getting into wrong section?**
If you set a sectionNameKeyPath for the fetched results controller, then you must also add a first sort descriptor to the fetch request that uses the same key (or a key that generates the same relative ordering).
So for sectionNameKeyPath:#"typeMessage" you should add one sort descriptor for the key "typeMessage":
NSSortDescriptor *sort1 = [[NSSortDescriptor alloc] initWithKey:#"typeMessage" ascending:YES];
NSSortDescriptor *sort2 = [[NSSortDescriptor alloc] initWithKey:#"sentDateTime" ascending:NO];
NSArray *sortDescriptors = [NSArray arrayWithObjects:sort1, sort2, nil];
[request setSortDescriptors:sortDescriptors];

Getting an NSInvalidArguementException error

I think it may have to do with over-releasing? It keeps crashing at if (![managedObjectContext save:&error]) like every third time the method is being called (when I add 3 exercises).
Update: I noticed it happens when I go to and from different routine instances.
2011-04-28 04:02:58.160 Curl[8035:707] Serious application error. Exception was caught during Core Data change processing. This is usually a bug within an observer of NSManagedObjectContextObjectsDidChangeNotification. -[__NSCFDictionary controllerWillChangeContent:]: unrecognized selector sent to instance 0x1ba1b0 with userInfo (null)
2011-04-28 04:02:58.353 Curl[8035:707] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFDictionary controllerWillChangeContent:]: unrecognized selector sent to instance 0x1ba1b0'
method
-(void)addExercise
{
if (managedObjectContext == nil)
{
managedObjectContext = [(CurlAppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
[managedObjectContext retain];
}
UIBarButtonItem *addButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(exerciseChooser)];
self.navigationItem.rightBarButtonItem = addButton;
[addButton release];
NSError *error = nil;
Exercise *exercise = (Exercise *)[NSEntityDescription insertNewObjectForEntityForName:#"Exercise" inManagedObjectContext:managedObjectContext];
exercise.name = selectedExercise;
NSLog(#"addExercise theSelectedRoutine: %#", theSelectedRoutine);
[theSelectedRoutine addRoutineToExercisesObject:exercise];
if (![managedObjectContext save:&error])
{
// Handle the error.
}
NSLog(#"%#", error);
NSLog(#"addExercise theSelectedRoutine: %#", theSelectedRoutine);
[self.routineTableView reloadData];
}
Here is full code:
#implementation RoutineDayTableViewController
#synthesize fetchedResultsController;
#synthesize exerciseChooserView;
#synthesize routineTableView;
#synthesize managedObjectContext;
#synthesize selectedExercise;
#synthesize entityArray;
#synthesize theSelectedRoutine;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)dealloc
{
NSLog(#"dealloc");
[fetchedResultsController release];
[selectedExercise release];
[managedObjectContext release];
[exerciseChooserView release];
[routineTableView release];
[entityArray release];
[theSelectedRoutine release];
[super dealloc];
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, imagtaes, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
self.routineTableView.delegate = self;
UIBarButtonItem *addButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(exerciseChooser)];
self.navigationItem.rightBarButtonItem = addButton;
[addButton release];
if (managedObjectContext == nil)
{
managedObjectContext = [(CurlAppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
[managedObjectContext retain];
}
[self loadData];
}
-(void)loadData
{
NSFetchRequest *request = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Exercise" inManagedObjectContext:managedObjectContext];
[request setEntity:entity];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
NSManagedObject *selectedObject = [entityArray objectAtIndex:indexPath.row];
NSLog(#"After managedObjectContext: %#", managedObjectContext);
NSError *error = nil;
NSMutableArray *mutableFetchResults = [[managedObjectContext executeFetchRequest:request error:&error] mutableCopy];
if (mutableFetchResults == nil) {
// Handle the error.
}
self.entityArray = mutableFetchResults;
[request setPredicate: [NSPredicate predicateWithFormat: #"routineExercises = %#", selectedObject]];
[mutableFetchResults release];
[request release];
}
- (void)viewDidUnload
{
NSLog(#"viewDidUnload");
[super viewDidUnload];
self.exerciseChooserView = nil;
self.routineTableView = nil;
self.fetchedResultsController = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Exercise Editing
-(IBAction)exerciseChooser
{
RoutineExerciseChooserViewController *routineExerciseChooserViewController = [[[RoutineExerciseChooserViewController alloc] init] autorelease];
[self.navigationController pushViewController:routineExerciseChooserViewController animated:YES];
}
-(void)addExercise
{
if (managedObjectContext == nil)
{
managedObjectContext = [(CurlAppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
[managedObjectContext retain];
}
UIBarButtonItem *addButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(exerciseChooser)];
self.navigationItem.rightBarButtonItem = addButton;
[addButton release];
NSError *error = nil;
Exercise *exercise = (Exercise *)[NSEntityDescription insertNewObjectForEntityForName:#"Exercise" inManagedObjectContext:managedObjectContext];
exercise.name = selectedExercise;
NSLog(#"addExercise theSelectedRoutine: %#", theSelectedRoutine);
[theSelectedRoutine addRoutineToExercisesObject:exercise];
if (![managedObjectContext save:&error])
{
// Handle the error.
}
NSLog(#"%#", error);
NSLog(#"addExercise theSelectedRoutine: %#", theSelectedRoutine);
//[self.routineTableView reloadData];
}
-(void)toggleEdit
{
[self.routineTableView setEditing: !self.routineTableView.editing animated:YES];
if (self.routineTableView.editing)
[self.navigationItem.rightBarButtonItem setTitle:#"Cancel"];
else
[self.navigationItem.rightBarButtonItem setTitle:#"Edit"];
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [[self.fetchedResultsController sections] count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
id <NSFetchedResultsSectionInfo> sectionInfo = [[self.fetchedResultsController sections] objectAtIndex:section];
return [sectionInfo numberOfObjects];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [routineTableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
Exercise *tempExercise = (Exercise *)[fetchedResultsController objectAtIndexPath:indexPath];
cell.textLabel.text = tempExercise.name;
return cell;
}
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete)
{
// Delete the managed object for the given index path
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
[context deleteObject:[self.fetchedResultsController objectAtIndexPath:indexPath]];
NSLog(#"fetched results : \n%#\n",[self.fetchedResultsController fetchedObjects]);
// Commit the change.
NSError *error = nil;
// Update the array and table view.
if (![managedObjectContext save:&error])
{
// Handle the error.
}
//[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:YES];
}
}
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath
{
NSManagedObject *managedObject = [self.fetchedResultsController objectAtIndexPath:indexPath];
cell.textLabel.text = [[managedObject valueForKey:#"name"] description];
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Navigation logic may go here. Create and push another view controller.
[routineTableView deselectRowAtIndexPath:indexPath animated:YES];
DetailViewController *detailViewController = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
[detailViewController release];
}
#pragma mark - Fetched results controller
- (NSFetchedResultsController *)fetchedResultsController
{
if (fetchedResultsController != nil)
{
return fetchedResultsController;
}
// Create the fetch request for the entity.
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Edit the entity name as appropriate.
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Exercise" inManagedObjectContext:self.managedObjectContext];
[fetchRequest setEntity:entity];
NSLog(#"fetchedResultsController theSelectedRoutine: %#",theSelectedRoutine);
[fetchRequest setPredicate:[NSPredicate predicateWithFormat: #"ANY exerciseToRoutine == %#", theSelectedRoutine]];
// Set the batch size to a suitable number.
[fetchRequest setFetchBatchSize:20];
// Edit the sort key as appropriate.
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"name" ascending:NO];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
// Edit the section name key path and cache name if appropriate.
// nil for section name key path means "no sections".
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:nil];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
NSError *error = nil;
if (![self.fetchedResultsController performFetch:&error])
{
/*
Replace this implementation with code to handle the error appropriately.
abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. If it is not possible to recover from the error, display an alert panel that instructs the user to quit the application by pressing the Home button.
*/
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
return fetchedResultsController;
[aFetchedResultsController release];
[fetchRequest release];
[sortDescriptor release];
[sortDescriptors release];
}
#pragma mark - Fetched results controller delegate
- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller
{
[self.routineTableView beginUpdates];
}
- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo
atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type
{
switch(type)
{
case NSFetchedResultsChangeInsert:
[self.routineTableView insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[self.routineTableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject
atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type
newIndexPath:(NSIndexPath *)newIndexPath
{
UITableView *tableView = self.routineTableView;
switch(type)
{
case NSFetchedResultsChangeInsert:
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeUpdate:
[self configureCell:[tableView cellForRowAtIndexPath:indexPath] atIndexPath:indexPath];
break;
case NSFetchedResultsChangeMove:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath]withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
[self.routineTableView endUpdates];
}
#end
Update - This is the new updated code:
#implementation RoutineDayTableViewController
#synthesize fetchedResultsController;
#synthesize exerciseChooserView;
#synthesize routineTableView;
#synthesize managedObjectContext;
#synthesize selectedExercise;
#synthesize theSelectedRoutine;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)dealloc
{
NSLog(#"dealloc");
[fetchedResultsController release];
[selectedExercise release];
[managedObjectContext release];
[exerciseChooserView release];
[routineTableView release];
[theSelectedRoutine release];
[super dealloc];
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, imagtaes, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
self.routineTableView.delegate = self;
UIBarButtonItem *addButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(exerciseChooser)];
self.navigationItem.rightBarButtonItem = addButton;
[addButton release];
if (managedObjectContext == nil)
{
managedObjectContext = [(CurlAppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
[managedObjectContext retain];
}
}
- (void)viewDidUnload
{
NSLog(#"viewDidUnload");
[super viewDidUnload];
self.exerciseChooserView = nil;
self.routineTableView = nil;
self.fetchedResultsController = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Exercise Editing
-(IBAction)exerciseChooser
{
RoutineExerciseChooserViewController *routineExerciseChooserViewController = [[[RoutineExerciseChooserViewController alloc] init] autorelease];
[self.navigationController pushViewController:routineExerciseChooserViewController animated:YES];
}
-(void)addExercise
{
if (managedObjectContext == nil)
{
managedObjectContext = [(CurlAppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
[managedObjectContext retain];
}
UIBarButtonItem *addButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(exerciseChooser)];
self.navigationItem.rightBarButtonItem = addButton;
[addButton release];
NSError *error = nil;
Exercise *exercise = (Exercise *)[NSEntityDescription insertNewObjectForEntityForName:#"Exercise" inManagedObjectContext:managedObjectContext];
exercise.name = self.selectedExercise;
NSLog(#"addExercise theSelectedRoutine: %#", theSelectedRoutine);
[theSelectedRoutine addRoutineToExercisesObject:exercise];
if (![fetchedResultsController.managedObjectContext save:&error])
{
// Handle the error.
}
NSLog(#"%#", error);
NSLog(#"addExercise theSelectedRoutine: %#", theSelectedRoutine);
//[self.routineTableView reloadData];
[exercise release];
[error release];
}
-(void)toggleEdit
{
[self.routineTableView setEditing: !self.routineTableView.editing animated:YES];
if (self.routineTableView.editing)
[self.navigationItem.rightBarButtonItem setTitle:#"Cancel"];
else
[self.navigationItem.rightBarButtonItem setTitle:#"Edit"];
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [[self.fetchedResultsController sections] count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
id <NSFetchedResultsSectionInfo> sectionInfo = [[self.fetchedResultsController sections] objectAtIndex:section];
return [sectionInfo numberOfObjects];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [routineTableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
Exercise *tempExercise = (Exercise *)[fetchedResultsController objectAtIndexPath:indexPath];
cell.textLabel.text = tempExercise.name;
return cell;
}
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete)
{
// Delete the managed object for the given index path
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
[context deleteObject:[self.fetchedResultsController objectAtIndexPath:indexPath]];
NSLog(#"fetched results : \n%#\n",[self.fetchedResultsController fetchedObjects]);
// Commit the change.
NSError *error = nil;
// Update the array and table view.
if (![fetchedResultsController.managedObjectContext save:&error])
{
// Handle the error.
}
//[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:YES];
}
}
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath
{
NSManagedObject *managedObject = [self.fetchedResultsController objectAtIndexPath:indexPath];
cell.textLabel.text = [[managedObject valueForKey:#"name"] description];
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Navigation logic may go here. Create and push another view controller.
[routineTableView deselectRowAtIndexPath:indexPath animated:YES];
DetailViewController *detailViewController = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
[detailViewController release];
}
#pragma mark - Fetched results controller
- (NSFetchedResultsController *)fetchedResultsController
{
if (fetchedResultsController != nil)
{
return fetchedResultsController;
}
// Create the fetch request for the entity.
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Edit the entity name as appropriate.
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Exercise" inManagedObjectContext:self.managedObjectContext];
[fetchRequest setEntity:entity];
NSLog(#"fetchedResultsController theSelectedRoutine: %#",theSelectedRoutine);
[fetchRequest setPredicate:[NSPredicate predicateWithFormat: #"ANY exerciseToRoutine == %#", theSelectedRoutine]];
// Set the batch size to a suitable number.
[fetchRequest setFetchBatchSize:20];
// Edit the sort key as appropriate.
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"name" ascending:NO];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
// Edit the section name key path and cache name if appropriate.
// nil for section name key path means "no sections".
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:nil];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
NSError *error = nil;
if (![self.fetchedResultsController performFetch:&error])
{
/*
Replace this implementation with code to handle the error appropriately.
abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. If it is not possible to recover from the error, display an alert panel that instructs the user to quit the application by pressing the Home button.
*/
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
[aFetchedResultsController release];
[fetchRequest release];
[sortDescriptor release];
[sortDescriptors release];
return fetchedResultsController;
}
#pragma mark - Fetched results controller delegate
- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller
{
[self.routineTableView beginUpdates];
}
- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo
atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type
{
switch(type)
{
case NSFetchedResultsChangeInsert:
[self.routineTableView insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[self.routineTableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject
atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type
newIndexPath:(NSIndexPath *)newIndexPath
{
UITableView *tableView = self.routineTableView;
switch(type)
{
case NSFetchedResultsChangeInsert:
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeUpdate:
[self configureCell:[tableView cellForRowAtIndexPath:indexPath] atIndexPath:indexPath];
break;
case NSFetchedResultsChangeMove:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath]withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
[self.routineTableView endUpdates];
}
#end
You are mixing two entirely separate means of accessing the Core Data information. You should have only one context reference and one fetch for each tableview. You have at least two fetches operating at the same time and two context references. You need to pick one or the other. If you are using a fetched results controller, then you don't need the code in either viewDidLoad and loadData.
You also need to use the self reference when referring to properties e.g. you need to use self.selectedExercise instead of just selectedExercise. Only the self reference form gives you automatic retention and release.
I see a few issues with your code.
The one most probably causing the error is that the fetchedResultsController method leaks a reference to the NSFetchedResultsController, along with a few other objects. The releases must occur before the return, not after.
Why does loadData add a predicate to the request after using it?
What is even the point of loadData? It sets up entityArray, which doesn't seem to be used anywhere else. Left over from before you added fetchedResultsController?
tableView:commitEditingStyle:forRowAtIndexPath: deletes an object from fetchedResultsController.managedObjectContext, but then saves self.managedObjectContext instead. This should work since those should always be the same, but it would be more semantically correct to use the same object for both operations.

Convert From FetchRequest Array To NSFetchedResultsController

My app currently fetches data on routineViewController's launch and loads it into eventsArray. I was encouraged to try using a NSFetchedResultsController instead.
I'm currently going through the Apple docs to learn more about it but in the meantime if anyone could help me start this conversion process, that would be great.
I added all the fetchresultscontroller code from the apple template but need help combing my addEvent method and the fetchresultcontroller's insertnewobject method. Or do I keep both?
#implementation RoutineTableViewController
#synthesize routineTableView;
#synthesize eventsArray;
#synthesize entered;
#synthesize managedObjectContext;
#pragma mark - View lifecycle
- (void)viewDidLoad
{
if (managedObjectContext == nil)
{
managedObjectContext = [(CurlAppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
}
NSFetchRequest *request = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Routine" inManagedObjectContext:managedObjectContext];
[request setEntity:entity];
NSError *error = nil;
NSMutableArray *mutableFetchResults = [[managedObjectContext executeFetchRequest:request error:&error] mutableCopy];
if (mutableFetchResults == nil) {
// Handle the error.
}
[self setEventsArray:mutableFetchResults];
[mutableFetchResults release];
[request release];
UIBarButtonItem * addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(showPrompt)];
[self.navigationItem setLeftBarButtonItem:addButton];
[addButton release];
UIBarButtonItem *editButton = [[UIBarButtonItem alloc]initWithTitle:#"Edit" style:UIBarButtonItemStyleBordered target:self action:#selector(toggleEdit)];
self.navigationItem.rightBarButtonItem = editButton;
[editButton release];
[super viewDidLoad];
}
- (void)viewDidUnload
{
self.eventsArray = nil;
[super viewDidUnload];
}
-(void)toggleEdit
{
[self.routineTableView setEditing: !self.routineTableView.editing animated:YES];
if (self.routineTableView.editing)
[self.navigationItem.rightBarButtonItem setTitle:#"Done"];
else
[self.navigationItem.rightBarButtonItem setTitle:#"Edit"];
}
- (void)dealloc
{
[managedObjectContext release];
[eventsArray release];
[entered release];
[super dealloc];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
#pragma mark -
#pragma mark Add an event
-(void)addEvent
{
Routine *routine = (Routine *)[NSEntityDescription insertNewObjectForEntityForName:#"Routine" inManagedObjectContext:managedObjectContext];
routine.name=entered;
NSError *error = nil;
if (![managedObjectContext save:&error])
{
// Handle the error.
}
NSLog(#"%#", error);
[eventsArray addObject:routine];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[self.routineTableView reloadData];
NSInteger lastSection = [self.routineTableView numberOfSections] -1;
[self.routineTableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:[self.routineTableView numberOfRowsInSection:lastSection]-1 inSection:lastSection] atScrollPosition:UITableViewScrollPositionBottom animated:YES];
}
-(void)showPrompt
{
AlertPrompt *prompt = [AlertPrompt alloc];
prompt = [prompt initWithTitle:#"Add Workout Day" message:#"\n \n Please enter title for workout day" delegate:self cancelButtonTitle:#"Cancel" okButtonTitle:#"Add"];
[prompt show];
[prompt release];
}
- (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
{
if (buttonIndex != [alertView cancelButtonIndex])
{
entered = [(AlertPrompt *)alertView enteredText];
if(eventsArray && entered)
{
[self addEvent];
}
}
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [eventsArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
}
Routine *tempRoutine = (Routine *)[eventsArray objectAtIndex:indexPath.row];
cell.textLabel.text = tempRoutine.name;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the managed object at the given index path.
NSManagedObject *eventToDelete = [eventsArray objectAtIndex:indexPath.row];
[managedObjectContext deleteObject:eventToDelete];
// Update the array and table view.
[eventsArray removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:YES];
// Commit the change.
NSError *error = nil;
if (![managedObjectContext save:&error]) {
// Handle the error.
}
}
}
EDIT Added methods for adding events/objects
-(void)addEvent
{
Routine *routine = (Routine *)[NSEntityDescription insertNewObjectForEntityForName:#"Routine" inManagedObjectContext:managedObjectContext];
routine.name=entered;
NSError *error = nil;
if (![managedObjectContext save:&error])
{
// Handle the error.
}
NSLog(#"%#", error);
[eventsArray addObject:routine];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[self.routineTableView reloadData];
NSInteger lastSection = [self.routineTableView numberOfSections] -1;
[self.routineTableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:[self.routineTableView numberOfRowsInSection:lastSection]-1 inSection:lastSection] atScrollPosition:UITableViewScrollPositionBottom animated:YES];
}
And the fetchResultsController's method:
- (void)insertNewObject
{
// Create a new instance of the entity managed by the fetched results controller.
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
NSEntityDescription *entity = [[self.fetchedResultsController fetchRequest] entity];
NSManagedObject *newManagedObject = [NSEntityDescription insertNewObjectForEntityForName:[entity name] inManagedObjectContext:context];
// If appropriate, configure the new managed object.
// Normally you should use accessor methods, but using KVC here avoids the need to add a custom class to the template.
[newManagedObject setValue:[NSDate date] forKey:#"timeStamp"];
// Save the context.
NSError *error = nil;
if (![context save:&error])
{
/*
Replace this implementation with code to handle the error appropriately.
abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. If it is not possible to recover from the error, display an alert panel that instructs the user to quit the application by pressing the Home button.
*/
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
}
Update With Full Code
#implementation RoutineTableViewController
#synthesize routineTableView;
#synthesize eventsArray;
#synthesize entered;
#synthesize managedObjectContext;
#synthesize fetchedResultsController=__fetchedResultsController;
#pragma mark - View lifecycle
- (void)viewDidLoad
{
if (managedObjectContext == nil)
{
managedObjectContext = [(CurlAppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
}
NSFetchRequest *request = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Routine" inManagedObjectContext:managedObjectContext];
[request setEntity:entity];
NSError *error = nil;
NSMutableArray *mutableFetchResults = [[managedObjectContext executeFetchRequest:request error:&error] mutableCopy];
if (mutableFetchResults == nil) {
// Handle the error.
}
[self setEventsArray:mutableFetchResults];
[mutableFetchResults release];
[request release];
UIBarButtonItem * addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(showPrompt)];
[self.navigationItem setLeftBarButtonItem:addButton];
[addButton release];
UIBarButtonItem *editButton = [[UIBarButtonItem alloc]initWithTitle:#"Edit" style:UIBarButtonItemStyleBordered target:self action:#selector(toggleEdit)];
self.navigationItem.rightBarButtonItem = editButton;
[editButton release];
[super viewDidLoad];
}
- (void)viewDidUnload
{
self.eventsArray = nil;
[super viewDidUnload];
}
-(void)toggleEdit
{
[self.routineTableView setEditing: !self.routineTableView.editing animated:YES];
if (self.routineTableView.editing)
[self.navigationItem.rightBarButtonItem setTitle:#"Done"];
else
[self.navigationItem.rightBarButtonItem setTitle:#"Edit"];
}
- (void)dealloc
{
[__fetchedResultsController release];
[managedObjectContext release];
[eventsArray release];
[entered release];
[super dealloc];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
#pragma mark -
#pragma mark Add an event
-(void)addEvent
{
Routine *routine = (Routine *)[NSEntityDescription insertNewObjectForEntityForName:#"Routine" inManagedObjectContext:managedObjectContext];
routine.name=entered;
NSError *error = nil;
if (![managedObjectContext save:&error])
{
// Handle the error.
}
NSLog(#"%#", error);
[eventsArray addObject:routine];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
//[self.routineTableView reloadData];
NSInteger lastSection = [self.routineTableView numberOfSections] -1;
[self.routineTableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:[self.routineTableView numberOfRowsInSection:lastSection]-1 inSection:lastSection] atScrollPosition:UITableViewScrollPositionBottom animated:YES];
}
/*
- (void)insertNewObject
{
// Create a new instance of the entity managed by the fetched results controller.
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
NSEntityDescription *entity = [[self.fetchedResultsController fetchRequest] entity];
NSManagedObject *newManagedObject = [NSEntityDescription insertNewObjectForEntityForName:[entity name] inManagedObjectContext:context];
// If appropriate, configure the new managed object.
// Normally you should use accessor methods, but using KVC here avoids the need to add a custom class to the template.
[newManagedObject setValue:[NSDate date] forKey:#"timeStamp"];
// Save the context.
NSError *error = nil;
if (![context save:&error])
{
/*
Replace this implementation with code to handle the error appropriately.
abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. If it is not possible to recover from the error, display an alert panel that instructs the user to quit the application by pressing the Home button.
*/
/*
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
}
*/
-(void)showPrompt
{
AlertPrompt *prompt = [AlertPrompt alloc];
prompt = [prompt initWithTitle:#"Add Workout Day" message:#"\n \n Please enter title for workout day" delegate:self cancelButtonTitle:#"Cancel" okButtonTitle:#"Add"];
[prompt show];
[prompt release];
}
- (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
{
if (buttonIndex != [alertView cancelButtonIndex])
{
entered = [(AlertPrompt *)alertView enteredText];
if(eventsArray && entered)
{
[self addEvent];
}
}
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [[self.fetchedResultsController sections] count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
id <NSFetchedResultsSectionInfo> sectionInfo = [[self.fetchedResultsController sections] objectAtIndex:section];
return [sectionInfo numberOfObjects];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
}
Routine *tempRoutine = (Routine *)[eventsArray objectAtIndex:indexPath.row];
cell.textLabel.text = tempRoutine.name;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the managed object for the given index path
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
[context deleteObject:[self.fetchedResultsController objectAtIndexPath:indexPath]];
// Update the array and table view.
[eventsArray removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:YES];
// Commit the change.
NSError *error = nil;
if (![managedObjectContext save:&error]) {
// Handle the error.
}
}
}
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath
{
NSManagedObject *managedObject = [self.fetchedResultsController objectAtIndexPath:indexPath];
cell.textLabel.text = [[managedObject valueForKey:#"name"] description];
}
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Navigation logic may go here. Create and push another view controller.
/*
<#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:#"<#Nib name#>" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
[detailViewController release];
*/
}
#pragma mark - Fetched results controller
- (NSFetchedResultsController *)fetchedResultsController
{
if (__fetchedResultsController != nil)
{
return __fetchedResultsController;
}
/*
Set up the fetched results controller.
*/
// Create the fetch request for the entity.
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Edit the entity name as appropriate.
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Routine" inManagedObjectContext:self.managedObjectContext];
[fetchRequest setEntity:entity];
// Set the batch size to a suitable number.
[fetchRequest setFetchBatchSize:20];
// Edit the sort key as appropriate.
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"name" ascending:NO];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
// Edit the section name key path and cache name if appropriate.
// nil for section name key path means "no sections".
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:#"Root"];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
[aFetchedResultsController release];
[fetchRequest release];
[sortDescriptor release];
[sortDescriptors release];
NSError *error = nil;
if (![self.fetchedResultsController performFetch:&error])
{
/*
Replace this implementation with code to handle the error appropriately.
abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. If it is not possible to recover from the error, display an alert panel that instructs the user to quit the application by pressing the Home button.
*/
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
return __fetchedResultsController;
}
#pragma mark - Fetched results controller delegate
- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller
{
[self.routineTableView beginUpdates];
}
- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo
atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type
{
switch(type)
{
case NSFetchedResultsChangeInsert:
[self.routineTableView insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[self.routineTableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject
atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type
newIndexPath:(NSIndexPath *)newIndexPath
{
UITableView *tableView = self.routineTableView;
switch(type)
{
case NSFetchedResultsChangeInsert:
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeUpdate:
[self configureCell:[tableView cellForRowAtIndexPath:indexPath] atIndexPath:indexPath];
break;
case NSFetchedResultsChangeMove:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath]withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
[self.routineTableView endUpdates];
}
/*
// Implementing the above methods to update the table view in response to individual changes may have performance implications if a large number of changes are made simultaneously. If this proves to be an issue, you can instead just implement controllerDidChangeContent: which notifies the delegate that all section and object changes have been processed.
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
// In the simplest, most efficient, case, reload the table view.
[self.tableView reloadData];
}
*/
#end
Basically, all you would do would be to move your current fetch into the fetched result controllers setup method. Then you would use the fetched results controller fetchObjects property (which is an array) exactly as you currently use eventsArray.
Look at a Core Data using Navigation based project template in Xcode. It should have a tableview controller configured with a fetched results controller.

How to display data stored in core data in a table view?

I have developed a core data model for my application. I need to display the saved data into a table view. For my app I have selected split view controller. I am writing down my codes below. Please help me in this regard and write me the code that needs to be added. This is very important as my continuation in my company depends on this.
#import "RootViewController.h"
#import "DetailViewController.h"
#import "AddViewController.h"
#import "EmployeeDetailsAppDelegate.h"
/*
This template does not ensure user interface consistency during editing operations in the table view. You must implement appropriate methods to provide the user experience you require.
*/
#interface RootViewController ()
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath;
#end
#implementation RootViewController
#synthesize detailViewController, fetchedResultsController, managedObjectContext, results, empName;
#pragma mark -
#pragma mark View lifecycle
- (void)viewDidLoad {
results = [[NSMutableDictionary alloc]init];
[results setObject:empName.text forKey:#"EmployeeName"];
[self.tableView reloadData];
[super viewDidLoad];
}
/*
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
}
*/
/*
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
}
*/
/*
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
}
*/
/*
- (void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
}
*/
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Ensure that the view controller supports rotation and that the split view can therefore show in both portrait and landscape.
return YES;
}
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath {
NSManagedObject *managedObject = [self.fetchedResultsController objectAtIndexPath:indexPath];
cell.textLabel.text = [[managedObject valueForKey:#"EmployeeName"] description];
}
#pragma mark -
#pragma mark Add a new object
- (void)insertNewObject:(id)sender {
AddViewController *add = [[AddViewController alloc]initWithNibName:#"AddViewController" bundle:nil];
self.modalPresentationStyle = UIModalPresentationFormSheet;
add.wantsFullScreenLayout = NO;
[self presentModalViewController:add animated:YES];
[add release];
}
#pragma mark -
#pragma mark Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell.
NSManagedObject *managedObject = [self.fetchedResultsController objectAtIndexPath:indexPath];
cell.textLabel.text = [[managedObject valueForKey:#"EmployeeName"] description];
return cell;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the managed object.
NSManagedObject *objectToDelete = [self.fetchedResultsController objectAtIndexPath:indexPath];
if (self.detailViewController.detailItem == objectToDelete) {
self.detailViewController.detailItem = nil;
}
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
[context deleteObject:objectToDelete];
NSError *error;
if (![context save:&error]) {
/*
Replace this implementation with code to handle the error appropriately.
abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. If it is not possible to recover from the error, display an alert panel that instructs the user to quit the application by pressing the Home button.
*/
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
}
}
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
// The table view should not be re-orderable.
return NO;
}
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)aTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Set the detail item in the detail view controller.
NSManagedObject *selectedObject = [self.fetchedResultsController objectAtIndexPath:indexPath];
self.detailViewController.detailItem = selectedObject;
}
#pragma mark -
#pragma mark Fetched results controller
- (NSFetchedResultsController *)fetchedResultsController {
if (fetchedResultsController != nil) {
return fetchedResultsController;
}
/*
Set up the fetched results controller.
*/
// Create the fetch request for the entity.
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Edit the entity name as appropriate.
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Details" inManagedObjectContext:managedObjectContext];
[fetchRequest setEntity:entity];
// Set the batch size to a suitable number.
[fetchRequest setFetchBatchSize:20];
// Edit the sort key as appropriate.
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"EmployeeName" ascending:NO];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
// Edit the section name key path and cache name if appropriate.
// nil for section name key path means "no sections".
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContext sectionNameKeyPath:nil cacheName:#"Root"];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
[aFetchedResultsController release];
[fetchRequest release];
[sortDescriptor release];
[sortDescriptors release];
return fetchedResultsController;
}
#pragma mark -
#pragma mark Fetched results controller delegate
- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller {
[self.tableView beginUpdates];
}
- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo
atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type {
switch(type) {
case NSFetchedResultsChangeInsert:
[self.tableView insertSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[self.tableView deleteSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject
atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type
newIndexPath:(NSIndexPath *)newIndexPath {
UITableView *tableView = self.tableView;
switch(type) {
case NSFetchedResultsChangeInsert:
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeDelete:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
break;
case NSFetchedResultsChangeUpdate:
[self configureCell:[tableView cellForRowAtIndexPath:indexPath] atIndexPath:indexPath];
break;
case NSFetchedResultsChangeMove:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath]withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller {
[self.tableView endUpdates];
}
#pragma mark -
#pragma mark Memory management
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Relinquish ownership any cached data, images, etc. that aren't in use.
}
- (void)viewDidUnload {
// Relinquish ownership of anything that can be recreated in viewDidLoad or on demand.
// For example: self.myOutlet = nil;
}
- (void)dealloc {
[detailViewController release];
[fetchedResultsController release];
[managedObjectContext release];
[super dealloc];
}
#end
//
// AddViewController.m
// EmployeeDetails
//
// Created by Dipanjan on 15/02/11.
// Copyright 2011 __MyCompanyName__. All rights reserved.
//
#import "AddViewController.h"
#import "EmployeeDetailsAppDelegate.h"
#import "RootViewController.h"
#implementation AddViewController
#synthesize empName;
#synthesize empID;
#synthesize empDepartment;
#synthesize backButton;
// The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
/*
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization.
}
return self;
}
*/
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
}
*/
-(void)saveDetails{
EmployeeDetailsAppDelegate *appDelegate = [[UIApplication sharedApplication]delegate];
NSManagedObjectContext *context = [appDelegate managedObjectContext];
NSManagedObject *newDetails;
newDetails = [NSEntityDescription insertNewObjectForEntityForName:#"Details" inManagedObjectContext:context];
[newDetails setValue:empID.text forKey:#"EmployeeID"];
[newDetails setValue:empName.text forKey:#"EmployeeName"];
[newDetails setValue:empDepartment.text forKey:#"EmployeeDepartment"];
empID.text = #"";
empName.text = #"";
empDepartment.text = #"";
NSLog(#"%#........----->>>...", newDetails);
NSError *error;
[context save:&error];
[self dismissModalViewControllerAnimated:YES];
}
-(void)findDetails {
EmployeeDetailsAppDelegate *appDelegate = [[UIApplication sharedApplication]delegate];
NSManagedObjectContext *context = [appDelegate managedObjectContext];
NSEntityDescription *entityDesc = [NSEntityDescription entityForName:#"Details" inManagedObjectContext:context];
NSFetchRequest *request = [[NSFetchRequest alloc]init];
[request setEntity:entityDesc];
NSPredicate *pred = [NSPredicate predicateWithFormat:#"(EmployeeName = %#)", empName.text];
[request setPredicate:pred];
NSManagedObject *matches = nil;
NSError *error;
NSArray *objects = [context executeFetchRequest:request error:&error];
if ([objects count] == 0) {
}
else {
matches = [objects objectAtIndex:0];
empID.text = [matches valueForKey:#"EmployeeID"];
empDepartment.text = [matches valueForKey:#"EmployeeDepartment"];
}
[request release];
[self dismissModalViewControllerAnimated:YES];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Overriden to allow any orientation.
return YES;
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc. that aren't in use.
}
- (void)viewDidUnload {
self.empName = nil;
self.empID = nil;
self.empDepartment = nil;
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[empID release];
[empName release];
[empDepartment release];
[super dealloc];
}
#end
Please let me know the answer as soon as possible.
#Dipanjan there is a core data tutorial in the devlopers document of X-Code and here it is coreDataBooks and its a best one try to take help from there in order to display the data in UITableView have a look at NSFetchedResultsController method.
http://www.bukisa.com/articles/180100_iphone-core-data-tutorial-part-1
http://mobile.tutsplus.com/tutorials/iphone/iphone-core-data/
Good Luck!
You need to fetch the data from the data using NSFetchResult. I guess you are doing it in the findDetails method, but where are you calling that method? You need to call that method to fetch the data, and then try to reload the table