僅在設備上運行應用程序時發生崩潰問題

Question

因此，我有一個非常奇怪的問題，當我在模擬器上運行我的應用程序並插入iPad（在插入電纜的設備上運行應用程序）時，它一切正常。它的插入，我試圖使用的應用程序後，在設備上運行後，但是，它崩潰..試圖尋找在設備崩潰日誌，我看到：

Thread 0 name: Dispatch queue: com.apple.main-thread 
Thread 0 Crashed: 
0 libobjc.A.dylib     0x3672bf78 objc_msgSend + 16 
1 App      0x000ca834 -[AHAppImageData dealloc] (AHInstagramImageData.m:122) 
2 libobjc.A.dylib     0x3672d16e _objc_rootRelease + 30 
3 CoreFoundation     0x33d792e0 CFRelease + 88 
4 CoreFoundation     0x33d8ea30 -[__NSArrayM removeObjectAtIndex:] + 288 
5 CoreFoundation     0x33d84adc -[NSMutableArray removeAllObjects] + 64 
6 App      0x000f717e -[AHImageDataSource clearDataSource] (AHImageDataSource.m:53) 
7 App      0x000c0a36 __49-[AHMainViewController loadRequestWithURLString:]_block_invoke_0 (AHMainViewController.m:91) 
8 libdispatch.dylib    0x32658c52 _dispatch_call_block_and_release + 6 
9 libdispatch.dylib    0x3265aee0 _dispatch_main_queue_callback_4CF$VARIANT$mp + 188 
10 CoreFoundation     0x33e032a6 __CFRunLoopRun + 1262 
11 CoreFoundation     0x33d8649e CFRunLoopRunSpecific + 294 
12 CoreFoundation     0x33d86366 CFRunLoopRunInMode + 98 
13 GraphicsServices    0x37d68432 GSEventRunModal + 130 
14 UIKit       0x36820cce UIApplicationMain + 1074 
15 App      0x000b2860 main (main.m:16) 
16 App      0x000b2820 0xb1000 + 6176 

知道爲什麼這僅僅發生在設備和當插入或模擬器運行應用程序時不行？

基於下面的評論，我顯示，負責該代碼：

[[AHMyAppAPIClient sharedClient] getPath:requestURLPath parameters:nil 
      success:^(AFHTTPRequestOperation *operation, id response) { 
       [self.progressHUD_ hide:YES]; 


       self.nextPaginationURL_ = [[response valueForKey:@"pagination"] valueForKey:@"next_url"]; 

       [self.collectionView_.pullToRefreshView stopAnimating]; 
       [[NSOperationQueue sharedOperationQueue] cancelAllOperations]; 


       NSArray *arr = [response valueForKey:@"data"]; 
       if ([arr count] > 0){ 
        [[AHImageDataSource sharedDataSource] clearDataSource]; 
       } 


       for (NSDictionary * data in arr){ 
        AHInstagramImageData * imgData = [[AHInstagramImageData alloc] initWithData:data]; 
        [[AHImageDataSource sharedDataSource] addObject:imgData]; 
        [imgData release]; 
       } 


       dispatch_async(dispatch_get_main_queue(), ^{ 
        [self.collectionView_ setContentOffset:CGPointMake(0, 0)]; 
        [self.collectionView_ reloadData]; 

       }); 

      } 
      failure:^(AFHTTPRequestOperation *operation, NSError *error) { 
       [self.progressHUD_ hide:YES]; 
       NSLog(@"Error fetching user data!"); 
       NSLog(@"%@", error);  

      }]; 

這是我如何設置數據源：

extern NSString * const kClearDataSource; 

@interface AHImageDataSource : NSObject 
+ (AHImageDataSource *)sharedDataSource; 
- (void) clearDataSource; 
- (void) addObject:(id) object; 
- (void) addObject:(id)object atIndex:(int) index; 
- (int) count; 
- (id) objectAtIndex:(int) index; 
@end 


NSString * const kClearDataSource = @"clearDataSource"; 

@interface AHImageDataSource() 
{ 
    NSMutableArray * imageDataSource_; 
} 

@property (nonatomic, retain) NSMutableArray * imageDataSource_; 

@end 

@implementation AHImageDataSource 
@synthesize imageDataSource_; 

+ (AHImageDataSource *)sharedDataSource { 
    static AHImageDataSource *_sharedClient = nil; 
    static dispatch_once_t oncePredicate; 
    dispatch_once(&oncePredicate, ^{ 
     _sharedClient = [[self alloc] init]; 
    }); 

    return _sharedClient; 
} 


- (id)init { 
    self = [super init]; 
    if (!self) { 
     return nil; 
    } 

    NSMutableArray * temp = [[NSMutableArray alloc] initWithCapacity:200]; 
    self.imageDataSource_ = temp; 
    [temp release]; 


    return self; 
} 

-(void) clearDataSource 
{ 
    if ([self.imageDataSource_ count] > 0){ 
     [self.imageDataSource_ removeAllObjects]; 
    } 

} 

- (void) addObject:(id) object 
{ 
    [self.imageDataSource_ addObject:object]; 
} 

- (void) addObject:(id)object atIndex:(int) index 
{ 
    [self.imageDataSource_ insertObject:object atIndex:index]; 
} 

- (int) count 
{ 
    return [self.imageDataSource_ count]; 
} 

- (id) objectAtIndex:(int) index 
{ 
    if (index >= 0 && index < [self.imageDataSource_ count]){ 
     return [self.imageDataSource_ objectAtIndex:index]; 
    } 

    return nil; 
} 

- (void) dealloc 
{ 
    [super dealloc]; 
    [imageDataSource_ release]; 
} 

@end 

編輯：

看來，NSZombieEnabled似乎隱藏了這個問題。當我禁用NSZombieEnabled時，它現在在模擬器和設備上崩潰。

Answer 1

我同意吉姆，看起來像一個雙發佈。

我會利用儀器的'zombie'配置文件來測試這種情況。它只能在模擬器中完成，但應該告訴你到底發生了什麼。

一旦100％清楚，解決這種情況通常很容易。

Answer 2

它看起來像是將AHInstagramImageData的實例放入字典中，然後降低保留數以使其被釋放。然後，當它從字典中被移除時，它會再次被釋放，它會嘗試爲不再存在的對象釋放內存。

發佈代碼負責，你可能會得到更詳細的幫助。一個崩潰日誌本身並不足以繼續。