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POAnimation doesn't start without view update
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  1. POAnimation doesn't start without view update
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    copied!<p><a href="https://github.com/SoundBlaster/ImageAnimationIssue" rel="nofollow">Sample on GitHub</a></p> <p>I have a strange problem.</p> <p>I have Navigation-based app with two UIViewControllers and Curl effect for transition between these.</p> <p>I add to bar button and add custom action: </p> <pre><code>-(IBAction)pushPage { NSLog(@"push page"); SecondViewController *secondView = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil]; [UIView beginAnimations:@"animation" context:nil]; [UIView setAnimationDuration:0.75]; [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self.navigationController.view cache:NO]; [self.navigationController pushViewController:secondView animated:NO]; [UIView commitAnimations]; [secondView release]; } </code></pre> <p>In SecondView I have a button with action:</p> <pre><code>-(IBAction)back { [imageAnimationIssueAppDelegate backPage]; } </code></pre> <p>Method <code>backPage</code> in AppDelegate:</p> <pre><code>-(void)backPage { NSLog(@"backPage"); [UIView beginAnimations:@"animation" context:nil]; [UIView setAnimationDuration:0.75]; [UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.navigationController.view cache:NO]; [self.navigationController popToRootViewControllerAnimated:NO]; [UIView commitAnimations]; } </code></pre> <p>PROBLEM: On the RootView I have <code>UIImageView</code> with animation:</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; animImage.animationImages = [NSArray arrayWithObjects: [UIImage imageNamed:@"1.png"], [UIImage imageNamed:@"2.png"], [UIImage imageNamed:@"3.png"], [UIImage imageNamed:@"4.png"], [UIImage imageNamed:@"3.png"], [UIImage imageNamed:@"2.png"], nil]; animImage.animationDuration = 0.5; animImage.animationRepeatCount = 0; } </code></pre> <p>I start it in <code>viewDidAppear</code>:</p> <pre><code>- (void)viewDidAppear:(BOOL)animated { NSLog(@"First view - viewDidAppear"); [super viewDidAppear:animated]; [animImage startAnimating]; } </code></pre> <p>I stop it in <code>viewDidDisapear</code>:</p> <pre><code>- (void)viewDidDisappear:(BOOL)animated { NSLog(@"First view - viewDidDisappear"); [super viewDidDisappear:animated]; [animImage stopAnimating]; } </code></pre> <p>When I back from SecondView animation is stoped! But <code>[animImage isAnimating]</code> say <code>YES</code>! It doesn't start witout update screen - you can click to button on the bottom and see it!</p> <p><strong>Is it bug?</strong></p> <p>Animation works without custom transitions.</p> <p>When I set <code>animated:YES</code> for push or pop view, animation works with custom transitions between views.</p> <p><strong>Why?</strong> Is there simple way to update displaying view to start animation?</p>
 

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