iPhone崩溃时呈现模态视图控制器 [英] iPhone crashing when presenting modal view controller

问题描述

 
我试图在模式显示另一个视图后直接显示模式视图（第二个是显示的加载视图） code>  - （void）viewDidAppear：（BOOL）animated {
 [super viewDidAppear：animated]; 
 //显示加载
 LoadViewController * loader = [[LoadViewController alloc] init]; 
 [self presentModalViewController：loader animated：NO]; 
 [loader release]; 
} 
  

但是当我这样做时，我得到一个程序接收信号：EXC_BAD_ACCESS 。错误。

堆栈跟踪是：

  0 0x30b43234 in  - [UIWindowController transitionViewDidComplete：fromView：toView：] 
 1 0x3095828e in  -  [UITransitionView notifyDidCompleteTransition：] 
 2 0x3091af0d in  -  [UIViewAnimationState sendDelegateAnimationDidStop：finished：] 
 3 0x3091ad7c in  -  [UIViewAnimationState animationDidStop：finished ：] 
 4 run_animation_callbacks中的0x0051e331 
 5 CA :: timer_callback中的0x0051e109 
 6 CFRunLoopRunSpecific中的
 6 0x302454a0 7 CFRunLoopRunInMode中的0x30244628 
 8 GSEventRunModal中的0x32044c31 
 9 0x32044cf6 in GSEventRun 
 10 0x309021ee in UIApplicationMain 
 11 0x00002154 in main.m：14 
  

任何想法？我完全被骗了！加载视图是空的，所以肯定没有发生在那里导致的错误。

感谢，

Mike

编辑：很奇怪...我稍微修改它，使加载视图显示一个微小的延迟后，这工作很好！所以它似乎是在同一个事件循环内的东西。

   - （void）viewDidAppear：（BOOL）animated {
 [super viewDidAppear：animated]; 
 //显示加载
 [self performSelector：@selector（doit）withObject：nil afterDelay：0.1]; 
} 
 
  - （void）doit {
 [self presentModalViewController：loader animated：YES]; 
} 
  

解决方案

加载视图显示一个微小的延迟后，这工作正常！所以它似乎是在同一个事件循环内的东西。

   - （void）viewDidAppear：（BOOL）animated {
 [super viewDidAppear：animated]; 
 //显示加载
 [self performSelector：@selector（doit）withObject：nil afterDelay：0.1]; 
} 
 
  - （void）doit {
 [self presentModalViewController：loader animated：YES]; 
} 
  

I'm trying to display a modal view straight after another view has been presented modally (the second is a loading view that appears).

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    // Show load
    LoadViewController *loader = [[LoadViewController alloc] init];
    [self presentModalViewController: loader animated:NO];
    [loader release];
}

But when I do this I get a "Program received signal: "EXC_BAD_ACCESS"." error.

The stack trace is:

0  0x30b43234 in -[UIWindowController transitionViewDidComplete:fromView:toView:]
1  0x3095828e in -[UITransitionView notifyDidCompleteTransition:]
2  0x3091af0d in -[UIViewAnimationState sendDelegateAnimationDidStop:finished:]
3  0x3091ad7c in -[UIViewAnimationState animationDidStop:finished:]
4  0x0051e331 in run_animation_callbacks
5  0x0051e109 in CA::timer_callback
6  0x302454a0 in CFRunLoopRunSpecific
7  0x30244628 in CFRunLoopRunInMode
8  0x32044c31 in GSEventRunModal
9  0x32044cf6 in GSEventRun
10 0x309021ee in UIApplicationMain
11 0x00002154 in main at main.m:14

Any ideas? I'm totally stumped! The loading view is empty so there's definitely nothing going on in there that's causing the error. Is it something to do with launching 2 views modally in the same event loop or something?

Thanks,

Mike

Edit: Very strange... I have modified it slightly so that the loading view is shown after a tiny delay, and this works fine! So it appears to be something within the same event loop!

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    // Show load
    [self performSelector:@selector(doit) withObject:nil afterDelay:0.1];
}

- (void)doit {
    [self presentModalViewController:loader animated:YES];  
}

解决方案

I have modified it slightly so that the loading view is shown after a tiny delay, and this works fine! So it appears to be something within the same event loop!

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    // Show load
    [self performSelector:@selector(doit) withObject:nil afterDelay:0.1];
}

- (void)doit {
    [self presentModalViewController:loader animated:YES];  
}

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