title: CGAffineTransformIdentity not resetting a UIImageView after multiple transforms?
body: <p>I have created a simple app with a segmented control at the top. When I click on one of two segments of the control a UIImageView starts to rotate. I have a reset button hooked up to set its transform to CGAffineTransformIdentity.</p>
  
  <p>The problem occurs when the method that does the view rotation animation is called a second time by switching segments back and forth. Hitting reset only removes the most recent animation. I have to switch segments a second time to get the animations to stop with reset entirely.</p>
  
  <p>The following code is called when I select the segment to rotate the UIImageView and obviously called a second time when I click between segments.</p>
  
  <pre><code>// Begin the animation block and set its name
  [UIView beginAnimations:@"Rotate Animation" context:nil];
  
  // Set the duration of the animation in seconds (floating point value)
  [UIView setAnimationDuration:0.5];
  
  // Set the number of times the animation will repeat (NSIntegerMax setting would repeat indefinately) (floating point value)
  [UIView setAnimationRepeatCount:NSIntegerMax];
  
  // Set the animation to auto-reverse (complete the animation in one direction and then do it backwards)
  [UIView setAnimationRepeatAutoreverses:YES];
  
  // Animation curve dictates the speed over time of an animation (UIViewAnimationCurveEaseIn, UIViewAnimationCurveEaseOut, UIViewAnimationCurveEaseInOut, UIViewAnimationCurveLinear)
  [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
  
  // Changes the imageViews transform property to rotate the view using CGAffineTransformRotate
  // CGAffineTransformRotate(transformToStartFrom, angleToRotateInRadians)
  // Starting transform property can be set to CGAffineTransformIdentity to start from views original transform state
  // This can also be done using CGAffineTransformMakeRotation(angleInRadians) to start from the IdentityTransform without implicitly stating so
  self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, degreesToRadians(90));
  
  [UIView commitAnimations];
  </code></pre>
  
  <p>The reset button calls this code -</p>
  
  <pre><code>self.imageView.transform = CGAffineTransformIdentity;
  </code></pre>