我有這個崩潰。它與其他線程類似,但不一樣。 我想先顯示一個模式視圖控制器,用戶轉到特定的視圖控制器。按照提示,我在 - (void)viewDidAppear:(BOOL)上執行動畫,並按照我的建議應用延遲。崩潰呈現模態視圖控制器
- (void) viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[self performSelector:@selector(presentMyModal) withObject:nil afterDelay:1];
}
- (void) presentModal{
ModalViewController *modal = [[[ModalViewController alloc] init] autorelease];
[self presentModalViewController:modal animated:YES];
}
之後,ramdomly它崩潰。我在控制檯中收到此消息:
<Warning>: *** Assertion failure in -[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:], /SourceCache/UIKit/UIKit-1447.6.4/UIWindowController.m:186
Thu Feb 3 10:00:44 unknown MyApp[1830] <Error>: *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Attempting to begin a modal transition from <UINavigationController: 0x454260> to <ModalViewController: 0x47af00> while a transition is already in progress. Wait for viewDidAppear/viewDidDisappear to know the current transition has completed'
*** Call stack at first throw:
(
0 CoreFoundation 0x3759dc7b __exceptionPreprocess + 114
1 libobjc.A.dylib 0x32d9bee8 objc_exception_throw + 40
2 CoreFoundation 0x3759dac3 +[NSException raise:format:arguments:] + 70
3 Foundation 0x351a3e73 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 62
4 UIKit 0x359e92a8 -[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:] + 208
5 UIKit 0x359e8c98 -[UIViewController presentModalViewController:withTransition:] + 2792
6 UIKit 0x35a7b51c -[UIViewController _tryRecursivelyPresentModalViewController:withTransition:] + 116
7 UIKit 0x359e84c0 -[UIViewController presentModalViewController:withTransition:] + 784
8 UIKit 0x359e8060 -[UIViewController presentModalViewController:animated:] + 96
9 MyApp 0x0005d57f -[MyAppViewController presentMyModal] + 58
10 Foundation 0x351724db __NSFireDelayedPerform + 366
11 CoreFoundation 0x37552305 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 16
12 CoreFoundation 0x37551cd9 __CFRunLoopDoTimer + 988
13 CoreFoundation 0x37521a91 __CFRunLoopRun + 1184
14 CoreFoundation 0x3752150b CFRunLoopRunSpecific + 226
15 CoreFoundation 0x37521419 CFRunLoopRunInMode + 60
16 GraphicsServices 0x33e76d24 GSEventRunModal + 196
17 UIKit 0x3591d57c -[UIApplication _run] + 588
18 UIKit 0x3591a558 UIApplicationMain + 972
19 MyApp 0x0000e75f main + 50
20 MyApp 0x0000e6e8 start + 52
正如您所看到的,我一直等到查看出現。這可能是一個操作系統錯誤?它似乎試圖遞歸地呈現其他模式視圖控制器,導致崩潰。 非常感謝。
不能直接顯示ModalViewController而不是先顯示其他視圖? – willcodejavaforfood 2011-02-04 10:49:33
感謝您的回答。最好不要,我們想展示一下這個觀點。不過,我們會考慮到它。 – toupper 2011-02-04 11:06:58