title: UIView disappears after orientation change
body: <p>I have the current problem:
   From an NSObject i'm creating / loading and animating a view:</p>
  
  <pre><code>[UIView beginAnimations:@"slidein" context:nil];
  [UIView setAnimationDelegate:self];
  [UIView setAnimationDuration:0.5];
  [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
  [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];
  
  
  [content.view setAlpha:1.0];
  for (UIView *view in content.view.subviews) {
      [view setAlpha:1];
  }
  [content.view setFrame:CGRectMake(0, 0, self.contentEnclosure.size.width, self.contentEnclosure.size.height)];
  
  
  [UIView commitAnimations];
  </code></pre>
  
  <p>My problem is that, when orientation changes, my animated view disappears. If i make my view appear again, the orientation settings (frame size) are correct, so i'm guessing, that the resizing mask is applied correctly, i just don't understand what needs to be done, for my view not to disappear.</p>