title: How to animate the background color of a UILabel?
body: <p>This looks like it should work, but doesn't. The color turns green at once.</p>
  
  <pre><code>self.labelCorrection.backgroundColor = [UIColor whiteColor];
  [UIView animateWithDuration:2.0 animations:^{
      self.labelCorrection.backgroundColor = [UIColor greenColor];
  }];
  </code></pre>