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

问题描述

我试图在另一个视图以模态方式呈现后立即显示一个模态视图(第二个是出现的加载视图).

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];
}

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

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

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  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

有什么想法吗?我完全被难住了！加载视图是空的，所以那里肯定没有任何事情会导致错误.这与在同一个事件循环中以模态方式启动 2 个视图有关吗?

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?

谢谢，

迈克

很奇怪...我稍微修改了一下，加载视图会在一点延迟后显示，这很好用！所以它似乎在同一个事件循环中！

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];  
}

推荐答案

我稍微修改了一下，加载视图会在一个微小的延迟后显示，效果很好！所以它似乎在同一个事件循环中！

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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