title: Rounded views not working in iOS 9
body: <p>I have a code that takes a view and rounds it corners - turning it into a circle:</p>
  
  <pre><code>imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 8, 8)];
  imageView.layer.cornerRadius = imageView.frame.size.width/2;
  imageView.layer.masksToBounds = YES;
  </code></pre>
  
  <p>This works great on iOS 7 and iOS 8 - but doesn't work on iOS 9.
  How can I fix it?</p>