iOS TableView crash loading different data
- by jollyr0ger
Hi to all!
I'm developing a simple iOS app where there is a table view with some categories (CategoryViewController).
When clicking one of this category the view will be passed to a RecipesListController with another table view with recipes. This recipes are loaded from different plist based on the category clicked.
The first time I click on a category, the recipes list is loaded and shown correctely. If i back to the category list and click any of the category (also the same again) the app crash. And I don't know how. The viewWillAppear is ececuted correctely but after crash.
Can you help me?
If you need the entire project I can zip it for you. Ok?
Here is the code of the CategoryViewController.h
#import <Foundation/Foundation.h>
#import "RecipeRowViewController.h"
@class RecipesListController;
@interface CategoryViewController : UITableViewController {
NSArray *recipeCategories;
RecipesListController *childController;
}
@property (nonatomic, retain) NSArray *recipeCategories;
@end
The CategoryViewControoler.m
#import "CategoryViewCotroller.h"
#import "NavAppDelegate.h"
#import "RecipesListController.h"
@implementation CategoryViewController
@synthesize recipeCategories;
- (void)viewDidLoad {
// Create the categories
NSArray *array = [[NSArray alloc] initWithObjects:@"Antipasti", @"Focacce", @"Primi", @"Secondi", @"Contorni", @"Dolci", nil];
self.recipeCategories = array;
[array release];
// Set background image
UIImageView *bgImg = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"sfondo_app.png"]];
[self.tableView setBackgroundView:bgImg];
[bgImg release];
[self.tableView reloadData];
[super viewDidLoad];
}
- (void)viewDidUnload {
self.recipeCategories = nil;
// [childController release];
[super viewDidUnload];
}
- (void)dealloc {
[recipeCategories release];
// [childController release];
[super dealloc];
}
#pragma mark -
#pragma mark Table data source methods
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [recipeCategories count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellId = @"RecipesCategoriesCellId";
// Try to reuse a cell or create a new one
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellId];
if (cell == nil) {
cell = [[[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:CellId] autorelease];
}
// Get the right value and assign to the cell
NSUInteger row = [indexPath row];
NSString *rowString = [recipeCategories objectAtIndex:row];
cell.textLabel.text = rowString;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
[rowString release];
return cell;
}
#pragma mark -
#pragma mark Table view delegate methods
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (childController == nil) {
childController = [[RecipesListController alloc] initWithStyle:UITableViewStyleGrouped];
}
childController.title = @"Ricette";
childController.category = [indexPath row];
[self.navigationController pushViewController:childController animated:YES];
}
@end
The RecipesListController.h
#import <Foundation/Foundation.h>
#import "RecipeRowViewController.h"
#define kRecipeArrayLink 0
#define kRecipeArrayDifficulty 1
#define kRecipeArrayFoodType 2
#define kRecipeAntipasti 0
#define kRecipeFocacce 1
#define kRecipePrimi 2
#define kRecipeSecondi 3
#define kRecipeContorni 4
#define kRecipeDolci 5
@class DisclosureDetailController;
@interface RecipesListController : UITableViewController {
NSInteger category;
NSDictionary *recipesArray;
NSArray *recipesNames;
NSArray *recipesLinks;
DisclosureDetailController *childController;
}
@property (nonatomic) NSInteger category;
@property (nonatomic, retain) NSDictionary *recipesArray;
@property (nonatomic, retain) NSArray *recipesNames;
@property (nonatomic, retain) NSArray *recipesLinks;
@end
The RecipesListcontroller.m
#import "RecipesListController.h"
#import "NavAppDelegate.h"
#import "DisclosureDetailController.h"
@implementation RecipesListController
@synthesize category, recipesArray, recipesNames, recipesLinks;
- (void)viewDidLoad {
// Set background image
UIImageView *bgImg = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"sfondo_app.png"]];
[self.tableView setBackgroundView:bgImg];
[bgImg release];
[self.tableView reloadData];
[super viewDidLoad];
}
- (void)viewWillAppear:(BOOL)animated {
if (self.recipesArray != nil) {
// Release the arrays
[self.recipesArray release];
[self.recipesNames release];
}
// Load the dictionary
NSString *path = nil;
// Load a different dictionary, based on the category
if (self.category == kRecipeAntipasti) {
path = [[NSBundle mainBundle] pathForResource:@"recipes_antipasti" ofType:@"plist"];
} else if (self.category == kRecipeFocacce) {
path = [[NSBundle mainBundle] pathForResource:@"recipes_focacce" ofType:@"plist"];
} else if (self.category == kRecipePrimi) {
path = [[NSBundle mainBundle] pathForResource:@"recipes_primi" ofType:@"plist"];
} else if (self.category == kRecipeSecondi) {
path = [[NSBundle mainBundle] pathForResource:@"recipes_secondi" ofType:@"plist"];
} else if (self.category == kRecipeContorni) {
path = [[NSBundle mainBundle] pathForResource:@"recipes_contorni" ofType:@"plist"];
} else if (self.category == kRecipeDolci) {
path = [[NSBundle mainBundle] pathForResource:@"recipes_dolci" ofType:@"plist"];
}
NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:path];
self.recipesArray = dict;
[dict release];
// Save recipes names
NSArray *array = [[recipesArray allKeys] sortedArrayUsingSelector:
@selector(compare:)];
self.recipesNames = array;
[self.tableView reloadData];
[super viewWillAppear:animated];
}
- (void)viewDidUnload {
self.recipesArray = nil;
self.recipesNames = nil;
self.recipesLinks = nil;
// [childController release];
[super viewDidUnload];
}
- (void)dealloc {
[recipesArray release];
[recipesNames release];
[recipesLinks release];
// [childController release];
[super dealloc];
}
#pragma mark -
#pragma mark Table data source methods
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [recipesNames count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *RecipesListCellId = @"RecipesListCellId";
// Try to reuse a cell or create a new one
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:RecipesListCellId];
if (cell == nil) {
cell = [[[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:RecipesListCellId] autorelease];
}
// Get the right value and assign to the cell
NSUInteger row = [indexPath row];
NSString *rowString = [recipesNames objectAtIndex:row];
cell.textLabel.text = rowString;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
[rowString release];
return cell;
}
#pragma mark -
#pragma mark Table view delegate methods
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (childController == nil) {
childController = [[DisclosureDetailController alloc] initWithNibName:@"DisclosureDetail" bundle:nil];
}
childController.title = @"Dettagli";
NSUInteger row = [indexPath row];
childController.recipeName = [recipesNames objectAtIndex:row];
NSArray *recipeRawArray = [recipesArray objectForKey:childController.recipeName];
childController.recipeLink = [recipeRawArray objectAtIndex:kRecipeArrayLink];
childController.recipeDifficulty = [recipeRawArray objectAtIndex:kRecipeArrayDifficulty];
[self.navigationController pushViewController:childController animated:YES];
}
@end
This is the crash log
Program received signal: “EXC_BAD_ACCESS”.
(gdb) bt
#0 0x00f0da63 in objc_msgSend ()
#1 0x04b27ca0 in ?? ()
#2 0x00002665 in -[RecipesListController viewWillAppear:] (self=0x4b38a00, _cmd=0x6d81a2, animated=1 '\001') at /Users/claudiocanino/Documents/iOS/CottoMangiato/Classes/RecipesListController.m:67
#3 0x00370c9a in -[UINavigationController _startTransition:fromViewController:toViewController:] ()
#4 0x0036b606 in -[UINavigationController _startDeferredTransitionIfNeeded] ()
#5 0x0037283e in -[UINavigationController pushViewController:transition:forceImmediate:] ()
#6 0x04f49549 in -[UINavigationControllerAccessibility(SafeCategory) pushViewController:transition:forceImmediate:] ()
#7 0x0036b4a0 in -[UINavigationController pushViewController:animated:] ()
#8 0x00003919 in -[CategoryViewController tableView:didSelectRowAtIndexPath:] (self=0x4b27ca0, _cmd=0x6d19e3, tableView=0x500c200, indexPath=0x4b2d650) at /Users/claudiocanino/Documents/iOS/CottoMangiato/Classes/CategoryViewCotroller.m:104
#9 0x0032a794 in -[UITableView _selectRowAtIndexPath:animated:scrollPosition:notifyDelegate:] ()
#10 0x00320d50 in -[UITableView _userSelectRowAtPendingSelectionIndexPath:] ()
#11 0x000337f6 in __NSFireDelayedPerform ()
#12 0x00d8cfe3 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ ()
#13 0x00d8e594 in __CFRunLoopDoTimer ()
#14 0x00ceacc9 in __CFRunLoopRun ()
#15 0x00cea240 in CFRunLoopRunSpecific ()
#16 0x00cea161 in CFRunLoopRunInMode ()
#17 0x016e0268 in GSEventRunModal ()
#18 0x016e032d in GSEventRun ()
#19 0x002c342e in UIApplicationMain ()
#20 0x00001c08 in main (argc=1, argv=0xbfffef58) at /Users/claudiocanino/Documents/iOS/CottoMangiato/main.m:15
Another bt log:
(gdb) bt
#0 0x00cd76a1 in __CFBasicHashDeallocate ()
#1 0x00cc2bcb in _CFRelease ()
#2 0x00002dd6 in -[RecipesListController setRecipesArray:] (self=0x6834d50, _cmd=0x4293, _value=0x4e3bc70) at /Users/claudiocanino/Documents/iOS/CottoMangiato/Classes/RecipesListController.m:16
#3 0x00002665 in -[RecipesListController viewWillAppear:] (self=0x6834d50, _cmd=0x6d81a2, animated=1 '\001') at /Users/claudiocanino/Documents/iOS/CottoMangiato/Classes/RecipesListController.m:67
#4 0x00370c9a in -[UINavigationController _startTransition:fromViewController:toViewController:] ()
#5 0x0036b606 in -[UINavigationController _startDeferredTransitionIfNeeded] ()
#6 0x0037283e in -[UINavigationController pushViewController:transition:forceImmediate:] ()
#7 0x091ac549 in -[UINavigationControllerAccessibility(SafeCategory) pushViewController:transition:forceImmediate:] ()
#8 0x0036b4a0 in -[UINavigationController pushViewController:animated:] ()
#9 0x00003919 in -[CategoryViewController tableView:didSelectRowAtIndexPath:] (self=0x4b12970, _cmd=0x6d19e3, tableView=0x5014400, indexPath=0x4b2bd00) at /Users/claudiocanino/Documents/iOS/CottoMangiato/Classes/CategoryViewCotroller.m:104
#10 0x0032a794 in -[UITableView _selectRowAtIndexPath:animated:scrollPosition:notifyDelegate:] ()
#11 0x00320d50 in -[UITableView _userSelectRowAtPendingSelectionIndexPath:] ()
#12 0x000337f6 in __NSFireDelayedPerform ()
#13 0x00d8cfe3 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ ()
#14 0x00d8e594 in __CFRunLoopDoTimer ()
#15 0x00ceacc9 in __CFRunLoopRun ()
#16 0x00cea240 in CFRunLoopRunSpecific ()
#17 0x00cea161 in CFRunLoopRunInMode ()
#18 0x016e0268 in GSEventRunModal ()
#19 0x016e032d in GSEventRun ()
#20 0x002c342e in UIApplicationMain ()
#21 0x00001c08 in main (argc=1, argv=0xbfffef58) at /Users/claudiocanino/Documents/iOS/CottoMangiato/main.m:15
Thanks
