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POremoveFromSuperview crash if don't use UIViewAnimation
 

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  1. POremoveFromSuperview crash if don't use UIViewAnimation
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    <p>I meet a strange problem. I use removeFromSuperview cause my app crush. but if I use [UIView animationWithDuration], it's gone be ok.</p> <p>see below This can be run successful.</p> <pre><code> [self willMoveToParentViewController:nil]; [UIView animateWithDuration:0.5 animations:^(void){ CATransition *transition = [CATransition animation]; transition.type = kCATransitionReveal; transition.subtype = kCATransitionFromBottom; transition.duration = 0.5; [self.view.superview.layer addAnimation:transition forKey:nil]; } completion:^(BOOL finished){ [self.view removeFromSuperview]; [self removeFromParentViewController]; }] ; </code></pre> <p>but if I remove the [UIView animationWithDuration] like this.</p> <pre><code> [self willMoveToParentViewController:nil]; [self.view removeFromSuperview]; [self removeFromParentViewController]; </code></pre> <p>It's gone be crashed.</p> <p>and here is how I add the subview</p> <pre><code> [self.tabBarController addChildViewController: vc]; CATransition *transition = [CATransition animation]; transition.type = kCATransitionMoveIn; transition.subtype = kCATransitionFromTop; transition.duration = 0.5; [self.tabBarController.view.layer addAnimation:transition forKey:nil]; [self.tabBarController.view addSubview:vc.view]; [self.tabBarController didMoveToParentViewController:vc]; </code></pre> <p>I have no idea why this happened. Hope someone can help me . It's a weird problem. <img src="https://i.stack.imgur.com/17jx9.png" alt="enter image description here"></p>
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    1. PTQuestion
    1. USzedzhao
    1. USzedzhao
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    1. This table or related slice is empty.
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    1. COIt'll help if you add the crash message as well.
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      1. POremoveFromSuperview crash if don't use UIViewAnimation
      1. USalexbumbu
    2. COThere is no crash message in output, only stop and the Xcode will navigate to the assembly language.
      singulars
      1. POremoveFromSuperview crash if don't use UIViewAnimation
      1. USzedzhao
    3. COAre you adding the `transition` to the `self.view.superview.layer` before `[self willMoveToParentViewController:nil];` ?
      singulars
      1. POremoveFromSuperview crash if don't use UIViewAnimation
      1. USalexbumbu
 

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