title: what is the relationship between a UIView.frame and CALayer.frame? (both pre and post a CATransform3D)
body: <p>How is a <code>CALAyer.frame</code> related to its <code>UIView.frame</code>? (in this case specifically a <code>UIImageView.frame</code>).</p>
  
  <p>Given that the values for a <code>CALayer.frame</code> potentially differ from its <code>UIView.frame</code> following a <code>CAtransform3D</code> transformation, do they no longer have any connection?  (and subsequently, should I be more concerned about managing the dimensions of my <code>CALayer</code> rather than my <code>UIImageView</code> in my superview?).</p>