title: Partial Curl get dissapears when home button clicks
body: <p>I am doing a partial curl using CATransition, It works fine but After home button click while the page is curved and trying to resume then the curved page gets disappear.</p>
  
  <p>Here is my code</p>
  
  <pre><code>self.animation = [CATransition animation];
  [self.animation setDelegate:self]; [animation setDuration:1.00];
  [self.animation setTimingFunction:UIViewAnimationCurveEaseInOut];
  
  if (!curled){
      self.animation.type = @"pageCurl"; 
      self.animation.fillMode = kCAFillModeForwards;
      self.animation.endProgress = 0.50; 
  }
  
  [self.animation setRemovedOnCompletion:NO];
  
  [[self view] exchangeSubviewAtIndex:0 withSubviewAtIndex:1];
  
  [[[self view] layer] addAnimation:self.animation forKey:@"pageCurlAnimation"];
  </code></pre>