2010-07-02 201 views
1

看来,使用MBProgressHUD导致我的应用程序崩溃。如果没有HUD代码,以下运行得很好,但有了它,它崩溃:MBProgressHUD导致应用程序崩溃

{ 

    ... 

    HUD = [[MBProgressHUD alloc] initWithView:self.view]; 

    // Add HUD to screen 
    [self.view addSubview:HUD]; 

    // Register for HUD callbacks so we can remove it from the window at the right time 
    HUD.delegate = self; 

    HUD.labelText = @"Connecting"; 

    // Show the HUD while the provided method executes in a new thread 
    [HUD showWhileExecuting:@selector(runLocalNotificationHandler) onTarget:self withObject:nil animated:YES]; 

[[self navigationController] popViewControllerAnimated:YES]; 
} 

- (void) runLocalNotificationHandler 
{ 
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; 

[self createLocalNotificationWithBug:[self tempBug]]; 

    [self performSelectorOnMainThread:@selector(finishedUpdatingNotifications) withObject:nil waitUntilDone:NO]; 

    [pool release]; 
} 

- (void)finishedUpdatingNotifications 
{ 

    [[self navigationController] popViewControllerAnimated:YES]; 
} 

- (void)hudWasHidden { 
    // Remove HUD from screen when the HUD was hidden 
    [HUD removeFromSuperview]; 
    [HUD release]; 
} 

以下调试输出产生:

gdb) continue 
2010-07-02 00:07:55.224 Bugger[16796:207] >>> Entering -[HomeViewController viewDidAppear:] <<< 
2010-07-02 00:07:55.225 Bugger[16796:207] <<< Leaving -[HomeViewController viewDidAppear:] >>> 
2010-07-02 00:07:55.224 Bugger[16796:7007] <<< Leaving -[BugDetailViewController runLocalNotificationHandler] >>> 
2010-07-02 00:07:55.226 Bugger[16796:207] >>> Entering -[BugDetailViewController prepareToolbar] <<< 
2010-07-02 00:07:55.227 Bugger[16796:207] <<< Leaving -[BugDetailViewController prepareToolbar] >>> 
2010-07-02 00:07:55.229 Bugger[16796:207] >>> Entering -[BugDetailViewController dealloc] <<< 
[Switching to process 16796] 
2010-07-02 00:07:55.260 Bugger[16796:207] <<< Leaving -[BugDetailViewController dealloc] >>> 
[Switching to process 16796] 
Program received signal: “EXC_BAD_ACCESS”. 
(gdb) 

这是怎么回事?

编辑:回溯:在那个(gdb)提示

Program received signal: “EXC_BAD_ACCESS”. 
[Switching to process 23788] 
(gdb) bt 
#0 0x029b4a93 in objc_msgSend() 
#1 0x00000000 in ??() 
(gdb) 
+0

当我看到EXC_BAD_ACCESS时,我会将NSZombieEnabled环境变量设置为YES并进行调试。 – 0x8badf00d 2011-12-27 16:41:00

回答

0

如此接近....

bt<return>和后期回溯。

除此之外,我最好的猜测是您的代表 - 上述代码中的self - 正在发布和释放,没有首先从MBProgressHUD实例中删除代理。代表们通常是一个弱引用,因此,这肯定会导致你描述的崩溃。


Ewwww ...你的堆栈已被踩踏!发生这种事时我讨厌它。

回到最佳猜测;您的代表是否在作为MBProgressHUD的代表被删除之前被释放? ...你有没有在你的代码上运行“构建和分析”?

+0

不,回溯不是很有用: 编程接收信号:“EXC_BAD_ACCESS”。 [切换到进程23788] (gdb)bt #0 0x029b4a93 in objc_msgSend() #1 0x00000000 in ?? () (gdb) – 2010-07-02 13:57:51

+0

“构建和分析”不给我任何有用的文件...所以我不能告诉。据我所知,这个代表并没有被释放,但我显然不能说出来。该代码并不反映它应该是。 – 2010-07-02 16:57:57

1

我对MBProgress和navigationController的组合有类似的问题,由于某种原因看起来你不能从选择器调用中调用导航控制器的动作,你只能在主线程中使用导航事件,希望这有助于。