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POiPhone crashing when presenting modal view controller
 

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  1. POiPhone crashing when presenting modal view controller
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    <p>I'm trying to display a modal view straight after another view has been presented modally (the second is a loading view that appears).</p> <pre><code>- (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; // Show load LoadViewController *loader = [[LoadViewController alloc] init]; [self presentModalViewController: loader animated:NO]; [loader release]; } </code></pre> <p>But when I do this I get a "Program received signal: "EXC_BAD_ACCESS"." error.</p> <p>The stack trace is:</p> <pre><code>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 </code></pre> <p>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?</p> <p>Thanks,</p> <p>Mike</p> <p>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!</p> <pre><code>- (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]; } </code></pre>
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    1. COJust where is the EXC_BAD_ACCESS coming from? You give us a stack trace here, but I'm not sure that the error is happening in this chunk of code. Can you edit the post to give us the full log with traces of where all the threads were?
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    2. COI'm not sure where it's coming from. That's the only trace I have, it would appear the bad access isn't coming from my code, so it's something internally accessing something, so I can't pinpoint it! I've ensured everything is retained so I've got no idea what's going on!
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    3. COTry putting `loader` in the autorelease pool. I think that loader is disappearing too soon, probably because the current view controller has to get out of the way for the new view and view controller. Other ideas: use the debugger and watch loader. If it is what's causing the trouble, you'll discover it that way. If not, keep poking around in the debugger and you might figure it out.
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