StackOverflow2013

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copied!<p>The problem is that <code>UIDeviceOrientationDidChangeNotification</code> will be fired independently from <code>shouldAutorotateToInterfaceOrientation</code>. And you don't handle the cases <code>UIInterfaceOrientationPortraitUpsideDown</code>, <code>UIDeviceOrientationFaceUp</code> and <code>UIDeviceOrientationFaceDown</code> in the method <code>orientationChanged:</code>. So when the device is rotated to one of these orientations, your code is equivalent to:</p> <pre><code>-(void)orientationChanged:(NSNotification *)object { [UIView commitAnimations]; [self dismissModalViewControllerAnimated:NO]; } </code></pre> <p>So you should remove the lines:</p> <pre><code>[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationChanged:)name:@"UIDeviceOrientationDidChangeNotification" object:nil]; </code></pre> <p>and put you code in the method <code>willRotateToInterfaceOrientation</code>:</p> <pre><code>- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation duration:(NSTimeInterval)duration { [UIView beginAnimations:@"View Flip" context:nil]; [UIView setAnimationDuration:0.5f]; [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; if (UIInterfaceOrientationIsPortrait(interfaceOrientation)) { self.view = self.portraitView; } else { self.view = self.landscapeView; } [UIView commitAnimations]; [self dismissModalViewControllerAnimated:NO]; } </code></pre> <p><strong>Edit</strong></p> <p>If you want to keep <code>orientationChanged</code>, then modify it as follows:</p> <pre><code>-(void)orientationChanged:(NSNotification *)object{ UIDeviceOrientation deviceOrientation = [[object object] orientation]; if (deviceOrientation == UIInterfaceOrientationPortrait) { [UIView beginAnimations:@"View Flip" context:nil]; [UIView setAnimationDuration:0.5f]; [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; self.view = self.portraitView; [UIView commitAnimations]; [self dismissModalViewControllerAnimated:NO]; } else if (deviceOrientation == UIInterfaceOrientationLandscapeLeft || deviceOrientation == UIInterfaceOrientationLandscapeRight) { [UIView beginAnimations:@"View Flip" context:nil]; [UIView setAnimationDuration:0.5f]; [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; self.view = self.landscapeView; [UIView commitAnimations]; [self dismissModalViewControllerAnimated:NO]; } } </code></pre>

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