title: Odd background image resizing on animating UIView
body: <p>I have a UIView in the middle of a view that I am using as a game playing area (in a 2d cocoa view).
  This image has a background image of the same size as the view.
  Resizing the view I use animation to make it look smooth (and that works fine). However, when the animation starts, the background image immediately changes size, tiling or being clipped to a size that when the animation finishes, the background image is physically the same size.</p>
  
  <p>I don't want this, I want the image to always fit the view, regardless of the view size.</p>
  
  <pre><code>    UIImage *bgImage = [UIImage imageNamed:@"head.png"];
  ... // resize the image returning another image
  self.view.backgroundColor = [[UIColor alloc] initWithPatternImage:resizedImage];
  [UIView beginAnimations:@"resizeView" context:nil];
  [UIView setAnimationDuration:.5];
  int localViewSize = ... // work out view sizes
  self.view.frame = CGRectMake(... ,localViewSize,localViewSize); 
  [UIView commitAnimations];
  </code></pre>
  
  <p>It looks very odd as it jumps to a different size, then animates to the original size.</p>
  
  <p>I am guessing that maybe I would have to make a separate view underneath my main view but is that the only way?</p>