table cell showing up in wrong section in table view - iphone

Question

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?**

Answer 1

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];