Need Help Loading Plist Into Multiple Tables - iphone

I have successfully loaded the muscleName items into a table view but am not having any luck loading their respective exerciseName into the 2nd table view.
The method I am using is:
cell.textLabel.text = [[self.exerciseArray objectAtIndex:indexPath.row] objectForKey: #"exerciseName"];
Maybe I need to define constants?
Edit:
Here is the code in ViewDidLoad for the first table that loads muscleName:
if (muscleArray == nil)
{
//Read the plist file into an array (the root element is an array)
NSString *path = [[NSBundle mainBundle]pathForResource:#"test" ofType:#"plist"];
NSMutableArray *rootLevel = [[NSMutableArray alloc]initWithContentsOfFile:path];
self.muscleArray = rootLevel;
[rootLevel release];
Here is my current sub table class
import "SpecificExerciseTableViewController.h"
#import "MusclesTableViewController.h"
#import "CurlAppDelegate.h"
#import "DetailViewController.h"
#implementation SpecificExerciseTableViewController
#synthesize exerciseArray;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
}
return self;
}
- (void)dealloc
{
[exerciseArray release];
[super dealloc];
}
- (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.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
self.navigationItem.title = #"Exercises";
[super viewDidLoad];
if (exerciseArray == nil)
{
//Read the plist file into an array (the root element is an array)
NSString *path = [[NSBundle mainBundle]pathForResource:#"test" ofType:#"plist"];
NSMutableArray *rootLevel = [[NSMutableArray alloc]initWithContentsOfFile:path];
self.exerciseArray = rootLevel;
[rootLevel release];
}
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (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
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.exerciseArray count];
}
- (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];
}
NSUInteger row = [indexPath row];
cell.textLabel.text = [[self.exerciseArray objectAtIndex:indexPath.row]objectForKey:#"exerciseName"];
return cell;
}
- (UITableViewCellAccessoryType)tableView:(UITableView *)tv accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath
{
return UITableViewCellAccessoryDisclosureIndicator;
}
#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:#"DetailViewController" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
[detailViewController release];
}
#end

Without seeing more of your code, it looks like you're accessing the exerciseName property okay if you are starting at exercises.
Are you sure that self.exerciseArray is pointing to your exercises object? The quickest way to check is just drop in an NSLog() statement and see if you have what you think you have:
NSLog(#"Exercises: %#", self.exerciseArray);

Related

UITableViewController does not load data

I'm new to iOS developing, I have a UITableViewController and I want to load NSMutableArray data in the table, but it does load data and shows an empty table. It's the code:
#import "PhotosTableViewController.h"
#implementation PhotosTableViewController
NSMutableArray *photos;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (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.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
photos = [[NSMutableArray alloc] init];
Photo *pic = [[Photo alloc] init];
[pic setName:#"over look"];
[pic setFilename:#"overlook.png"];
[pic setNotes:#"this is notw!"];
[photos addObject:pic];
pic = [[Photo alloc] init];
[pic setName:#"olives"];
[pic setFilename:#"olives.png"];
[pic setNotes:#"this is notw!"];
[photos addObject:pic];
}
- (void)viewDidUnload
{
[super viewDidUnload];
}
- (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
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [photos count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"PhotoCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Configure the cell...
Photo *current=[photos objectAtIndex:indexPath.row];
cell.textLabel.text=[current name];
return cell;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Navigation logic may go here. Create and push another view controller.
}
#end
Add [self.view reloadData]; at the end of your viewDidLoad implementation.
If that does not help already, I suspect that your viewController is actually not of type PhotoTableViewController. Make sure that is correctly setup. If done via InterfaceBuilder, check the type of the viewController and make sure it says PhotoTableViewController.
Le Sigh you'd be surprised how many UITableView questions are solved with 'Make your class the delegate and datasource.'. In IB, drag the outlets to files owner. In code, set tableView.delegate = self; and tableView.datasource = self;

Pushing new detail view for each object

please help .... i have a tableview with a list of vehicle
what i want is each of those vehicles to push a view with a text/paragraph describing each of those vehicles. I am new to coding so please try to keep your answers simple
this is my table.h
#import <UIKit/UIKit.h>
#interface table_1 : UITableViewController
{
NSMutableArray *vehicle;
}
#end
this is my table.m
#import "table 1.h"
#import "detailview.h"
#implementation table_1
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (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.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
vehicle = [[NSMutableArray alloc] init];
[vehicle addObject:#"sedan"];
[vehicle addObject:#"van"];
[vehicle addObject:#"suv"];
[vehicle addObject:#"truck"];
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (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
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [vehicle count];
}
- (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];
}
// Configure the cell...
cell.textLabel.text = [vehicle objectAtIndex:indexPath.row];
return cell;
}
- (UITableViewCellAccessoryType)tableView:(UITableView *)tableView accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath {
//return UITableViewCellAccessoryDetailDisclosureButton;
return UITableViewCellAccessoryDisclosureIndicator;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *selectedcar = [vehicle objectAtIndex:indexPath.row];
detailview *dvController = [[detailview alloc] initWithNibName:#"detailview" bundle:[NSBundle mainBundle]];
dvController.selectedVehicle = selectedcar;
[self.navigationController pushViewController:dvController animated:YES];
dvController = nil;
}
#end
this is detailview.h
#import <UIKit/UIKit.h>
#interface detailview : UIViewController
{
IBOutlet UILabel *lblText;
NSString *selectedVehicle;
}
#property (nonatomic, retain) NSString *selectedVehicle;
#end
this is detail.m
#import "detailview.h"
#implementation detailview
#synthesize selectedVehicle;
Xcode 4.2 has a Master-Detail Application project template which provides a starting point for the master-detail application you're trying to implement.

Table view cell disappear when i switch to another page and then back

I have a table view that you can add and delete cells. I can enter multiple cells and when i go to the next page and then switch back, all of my entries/ cells are erased. Can any one figure this out? Here is my code:
#implementation FacePlatesViewController
#synthesize woodGrain;
#synthesize nav, array;
#synthesize EditButton;
#synthesize myTableView, image;
#synthesize cell, string1;
#synthesize myDic, cells, defaults;
#synthesize selectedCell, currentChosenFund;
- (void)viewDidLoad {
[super viewDidLoad];
NSString * myFile = [[NSBundle mainBundle]pathForResource:#"cells" ofType:#"plist"];
self.myTableView.backgroundColor = [UIColor clearColor];
cells = [[NSMutableArray alloc]initWithContentsOfFile:myFile];
}
- (void)addObject:(id)anObject
{
if (anObject != nil)
{
[cells addObject:anObject];
}
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.myTableView reloadData];
}
- (IBAction)editButton:(id)sender
{
if (self.editing)
{
[self setEditing:NO animated:YES];
[self.myTableView setEditing:NO animated:YES];
}
else
{
[self setEditing:YES animated:YES];
[self.myTableView setEditing:YES animated:YES];
}
}
- (void)add
{
MyDetailViewController * detail = [[MyDetailViewController alloc]init];
detail.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentModalViewController:detail animated:YES];
[detail.text becomeFirstResponder];
[detail release];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [cells count];
}
- (void) tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete)
{
[[self cells] removeObjectAtIndex:[indexPath row]];
NSArray *indexPaths = [NSArray arrayWithObject:indexPath];
[[self myTableView] deleteRowsAtIndexPaths:indexPaths
withRowAnimation:UITableViewRowAnimationFade];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:
(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero
reuseIdentifier:CellIdentifier] autorelease];
}
//The if block should end here. You should set the cell's label irrespective whether the cell was nil. This is the cause of the issue you are facing.
cell.textLabel.text = [[cells objectAtIndex:indexPath.row] valueForKey:#"name"];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
FirstFolderViewController * first = [[FirstFolderViewController alloc]init];
first.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:first animated:YES];
[first release];
}
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES;
}
- (void) tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath
toIndexPath:(NSIndexPath *)targetIndexPath
{
NSUInteger sourceIndex = [sourceIndexPath row];
NSUInteger targetIndex = [targetIndexPath row];
if (sourceIndex != targetIndex)
{
[[self cells] exchangeObjectAtIndex:sourceIndex
withObjectAtIndex:targetIndex];
}
}
- (void)dealloc
{
[woodGrain release];
[myTableView release];
[EditButton release];
[nav release];
[cells release];
[myTableView release];
[myDic release];
[super dealloc];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
#pragma mark - View lifecycle
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
[super viewDidLoad];
}
*/
- (void)viewDidUnload
{
[self setWoodGrain:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#end
Thanks :D
Actually even unloading of the view will be enough to throw away the cells. Try this in your viewDidLoad:
if(!cells) {
NSString * myFile = [[NSBundle mainBundle]pathForResource:#"cells" ofType:#"plist"];
self.myTableView.backgroundColor = [UIColor clearColor];
cells = [[NSMutableArray alloc]initWithContentsOfFile:myFile];
}
(this way you won't be rereading the array every time the view is loaded).
And if you want the added cells to persist between app restarts, you do need to save them somewhere. You can't change the files in the main bundle, but you can write your own file into the Caches folder, which you can get via:
[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
Write your file into that folder and read the cells from there instead of the main bundle. If you have some pre-defined cells in the main bundle file, you can check if the file in the Caches folder exists when the app starts, and if not, copy the bundle's file into the Caches folder.
Edit: if you do presentModalViewController to get back from the another page, you'll get a fresh copy of FacePlatesViewController, which obviously loads the default cells from the file.
Instead, you should add a "delegate" property to your FirstFolderViewController:
#property(nonatomic, assign) id delegate; //yes, assign, not retain
then when presenting FirstFolderViewController do:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
FirstFolderViewController * first = [[FirstFolderViewController alloc]init];
first.delegate = self;
first.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:first animated:YES];
[first release];
}
Then add a method to FacePlatesViewController:
- (void) onDoneWithFirstFolderViewController //you can come up with a better name
{
[self dismissModalViewControllerAnimated:YES];
}
and in your FirstFolderViewController, when you are ready to close it, do:
if([delegate respondsToSelector:#selector(onDoneWithFirstFolderViewController)])
[delegate onDoneWithFirstFolderViewController];
Ironically, if you had implemented the cell persistence in a file, this issue might have been unnoticed (because each new FacePlatesViewController would load an up-to-date cell list), but you would have had a memory leak each time you went between pages.
To me, the problem seems to be related to your code in ViewWillAppear: Have you ensured that your cells array is fine when you call [self.myTableView reloadData]; ?
Also, I noticed myTableView. Are you subclassing UITableViewController or implementing table delegates? If you are subclassing, the table view reference is named tableView.
HTH,
Akshay

iOS TableView drilldown freeze

Alright this is what I have so far in my application, the main view which has a tableview with different tasks. When you touch one it pushes to the DetailViewController. I have been trying to make an internal tableview in the detailview. So I have a TableController up now but now when I click a task it just freezes.
Update Added Code:
//RootViewController
#import "RootViewController.h"
#import "DetailViewController.h"
#implementation RootViewController
#synthesize toolbar;
#synthesize window;
#pragma mark -
#pragma mark View lifecycle
- (void)viewDidLoad {
theArray = [[NSArray alloc] initWithObjects:#"Kill Taylor",#"Stab Taylor",#"Pay Jordan",nil];
//theArray = [[NSMutableArray alloc] init];
[super viewDidLoad];
addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:#selector(addButtonPressed)];
self.navigationItem.rightBarButtonItem = addButton;
self.navigationItem.leftBarButtonItem = self.editButtonItem;
//self.navigationItem.rightBarButtonItem = addButton;
// self.navigationItem.rightBarButtonItem = addButton;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
- (UITableViewCellAccessoryType)tableView:(UITableView *)tableView accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath {
//return UITableViewCellAccessoryDetailDisclosureButton;
return UITableViewCellAccessoryDetailDisclosureButton;
}
-(void) addButtonPressed
{
NSString *selectedAction = #"add";
DetailViewController *dvController = [[DetailViewController alloc] initWithNibName:#"DetailView" bundle:[NSBundle mainBundle]];
dvController.selectedAction = selectedAction;
//dvController.selectedTask = selectedTask;
[self.navigationController pushViewController:dvController animated:YES];
[dvController release];
dvController = nil;
}
- (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];
}
*/
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations.
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
// Customize the number of sections in the table view.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [theArray count];
}
// Customize the appearance of table view cells.
- (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];
}
cell.textLabel.text = [theArray objectAtIndex:indexPath.row];
return cell;
}
- (void)setEditing:(BOOL)editing animated:(BOOL)animated
{
if (editing)
{
// turn on the "add" button when editing
//self.navigationItem.rightBarButtonItem = addButton;
}
else
{
// remove the "add" butto when not editing
//self.navigationItem.rightBarButtonItem = nil;
}
[super setEditing:editing animated:animated];
}
/*
// 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;
}
*/
/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source.
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
}
}
*/
/*
// 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 -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *selectedAction = #"details";
NSString *selectedTask = [theArray objectAtIndex:indexPath.row];
DetailViewController *dvController = [[DetailViewController alloc] initWithNibName:#"DetailView" bundle:[NSBundle mainBundle]];
dvController.selectedAction = selectedAction;
dvController.selectedTask = selectedTask;
[self.navigationController pushViewController:dvController animated:YES];
[dvController release];
dvController = nil;
}
#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 {
[super dealloc];
}
#end
The above all works
#import "DetailViewController.h"
#implementation DetailViewController
#synthesize selectedTask;
#synthesize selectedAction;
// 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 loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
}
*/
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
if(selectedAction == #"details"){
[super viewDidLoad];
self.navigationItem.title = #"Task Details";
//lblText.text = selectedTask;
}
else if(selectedAction == #"add"){
[super viewDidLoad];
self.navigationItem.title = #"Add Task";
//lblText.text = selectedTask;
}
}
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations.
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
- (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 {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[selectedTask release];
[lblText release];
[super dealloc];
}
#end
This does not work if it has any stuff that build the inside table.
I think the problem may be in your viewDidLoad method in DetailedViewController. Fix the following two things and see if that makes a difference.
Move your [super viewDidLoad] so out of your if conditional.
Compare string in the right ways using the isEqualToString: method
Here's your code, tweaked:
- (void)viewDidLoad
{
[super viewDidLoad];
if(selectedAction isEqualToString: #"details")
{
self.navigationItem.title = #"Task Details";
//lblText.text = selectedTask;
}
else if (selectedAction isEqualToString: #"add")
{
self.navigationItem.title = #"Add Task";
//lblText.text = selectedTask;
}
}

problem with unloading view. app get crashed

In my application
It do have tableview... with two rows.
Date.
City.
When selected Date ...i load EventViewController view which working well and good...
when getting back to my tableview and selected City my app get crashed
I do not see any thing in my console. its not showing any message.
What to do...
here is the code....
The For implementation......
but my app get crashed...
#import "SearchViewController.h"
#import "SearchDetailViewController.h"
#import "EventViewController.h"
#implementation SearchViewController
#synthesize searchListArray;
/*
// 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 {
if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
// Custom initialization
}
return self;
}
*/
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
UIBarButtonItem *barButton=[[UIBarButtonItem alloc]initWithTitle:#"Back" style:UIBarButtonItemStylePlain target:nil action:nil];
self.navigationItem.backBarButtonItem=barButton;
[barButton release];
searchListArray =[[NSMutableArray alloc]init];
[searchListArray addObject:#"City"];
[searchListArray addObject:#"Populair"];
[searchListArray addObject:#"Date"];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Return the number of rows in the section.
return [searchListArray count];
}
// Customize the appearance of table view cells.
- (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];
cell.selectionStyle= UITableViewCellSelectionStyleBlue;
// cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
cell.backgroundColor=[UIColor blueColor];
cell.textLabel.text=[searchListArray objectAtIndex:indexPath.row];
switch (indexPath.row) {
case 0:
cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
break;
case 2:
cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
break;
default:
break;
}
}
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
switch (indexPath.row) {
case 0:
NSLog(#"searchdetailedview");
SearchDetailViewController *searchDetailViewController = [[SearchDetailViewController alloc] initWithNibName:#"SearchDetailViewController" bundle:nil];
[self.navigationController pushViewController:searchDetailViewController animated:YES];
// self.navigationItem.title = #"Back";
[searchDetailViewController release];
searchDetailViewController=nil;
break;
case 2:
NSLog(#"eventviewController");
EventViewController *eventViewController=[[EventViewController alloc]initWithNibName:#"EventViewController" bundle:nil];
[self.navigationController pushViewController:eventViewController animated:YES];
[eventViewController release];
eventViewController=nil;
break;
default:
break;
}
}
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
- (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 {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[searchListArray release];
[super dealloc];
}
EventViewController
#import "EventViewController.h"
#implementation EventViewController
#synthesize eventsList;
#synthesize eventStore;
#synthesize defaultCalendar;
#synthesize detailViewController;
#pragma mark -
#pragma mark View lifecycle
- (void)viewDidLoad {
[super viewDidLoad];
self.title=#"Event List";
self.eventStore=[[EKEventStore alloc]init];
self.eventsList=[[NSMutableArray alloc]initWithArray:0];
self.defaultCalendar=[self.eventStore defaultCalendarForNewEvents];
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
UIBarButtonItem *addButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:
UIBarButtonSystemItemAdd target:self action:#selector(addEvent:)];
self.navigationItem.rightBarButtonItem = addButtonItem;
[addButtonItem release];
self.navigationController.delegate = self;
[self.eventsList addObjectsFromArray:[self fetchEventsForToday]];
[self.tableView reloadData];
}
- (IBAction) addEvent:(id)sender{
EKEventEditViewController *addController = [[EKEventEditViewController alloc] initWithNibName:nil bundle:nil];
// set the addController's event store to the current event store.
addController.eventStore = self.eventStore;
// present EventsAddViewController as a modal view controller
[self presentModalViewController:addController animated:YES];
addController.editViewDelegate = self;
[addController release];
}
- (NSArray *) fetchEventsForToday{
NSDate *startDate = [NSDate date];
// endDate is 1 day = 60*60*24 seconds = 86400 seconds from startDate
NSDate *endDate = [NSDate dateWithTimeIntervalSinceNow:86400];
// Create the predicate. Pass it the default calendar.
NSArray *calendarArray = [NSArray arrayWithObject:defaultCalendar];
NSPredicate *predicate = [self.eventStore predicateForEventsWithStartDate:startDate endDate:endDate
calendars:calendarArray];
// Fetch all events that match the predicate.
NSArray *events = [self.eventStore eventsMatchingPredicate:predicate];
return events;
}
- (void)viewWillAppear:(BOOL)animated {
// [super viewWillAppear:animated];
[self.tableView deselectRowAtIndexPath:self.tableView.indexPathForSelectedRow animated:NO];
}
/*
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
}
*/
/*
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
}
*/
/*
- (void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
}
*/
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark -
#pragma mark Table view data source
//- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// // Return the number of sections.
// // return <#number of sections#>;
//}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Return the number of rows in the section.
return [eventsList count];
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCellAccessoryType editableCellAccessoryType =UITableViewCellAccessoryDisclosureIndicator;
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
cell.accessoryType=editableCellAccessoryType;
cell.textLabel.text=[[self.eventsList objectAtIndex:indexPath.row]title];
// Configure the cell...
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;
}
*/
/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// 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 -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Navigation logic may go here. Create and push another view controller.
// Upon selecting an event, create an EKEventViewController to display the event.
self.detailViewController = [[EKEventViewController alloc] initWithNibName:nil bundle:nil];
detailViewController.event = [self.eventsList objectAtIndex:indexPath.row];
// Allow event editing.
detailViewController.allowsEditing = YES;
// Push detailViewController onto the navigation controller stack
// If the underlying event gets deleted, detailViewController will remove itself from
// the stack and clear its event property.
[self.navigationController pushViewController:detailViewController animated:YES];
}
#pragma mark -
#pragma mark Navigation Controller delegate
- (void)navigationController:(UINavigationController *)navigationController
willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{
if (viewController == self && self.detailViewController.event.title == NULL) {
[self.eventsList removeObject:self.detailViewController.event];
[self.tableView reloadData];
}
}
- (void)eventEditViewController:(EKEventEditViewController *)controller
didCompleteWithAction:(EKEventEditViewAction)action{
NSError *error=nil;
EKEvent *thisEvent=controller.event;
switch (action) {
case EKEventEditViewActionCanceled:
break;
case EKEventEditViewActionSaved:
if (self.defaultCalendar ==thisEvent.calendar) {
[self.eventsList addObject:thisEvent];
}
[controller.eventStore saveEvent:controller.event span:EKSpanThisEvent error:&error];
[self.tableView reloadData];
break;
case EKEventEditViewActionDeleted:
if (self.defaultCalendar == thisEvent.calendar) {
[self.eventsList removeObject:thisEvent];
}
[controller.eventStore removeEvent:thisEvent span:EKSpanThisEvent error:&error];
[self.tableView reloadData];
break;
default:
break;
}
[controller dismissModalViewControllerAnimated:YES];
}
- (EKCalendar *)eventEditViewControllerDefaultCalendarForNewEvents:(EKEventEditViewController *)controller{
EKCalendar *calendarForEdit=self.defaultCalendar;
return calendarForEdit;
}
#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;
self.eventsList = nil;
[self.detailViewController release];
}
- (void)dealloc {
[super dealloc];
}
This is what i did.... Help me out.
#thanks in advance.
Please do the following steps:
1) Press Build and Debug (Build -> Build and Debug - Breakpoints on)
2) Open your Debugger
3) Create the crash
4) Now, go to the debugger and search for a black item on the left side
5) Press this item and you'll find where the app is crashing
If you have done this, please write where your application crashs - this will be much easier. And maybe, you'll find the error.
I think your problem could be the self.navigationController.delegate = self; in -[EventViewController viewDidLoad]. When you hit the back button, the EventViewController is released, but the navigationController still thinks it is its delegate. Therefore, when it asks if it is OK to open the next view controller, it is calling methods on a released object and causing a crash.