title: Add CALayer below UIView
body: <p>I got a <code>UIView</code> (let's call it superview) which contains another <code>UIView</code> (lets call it subview). </p>
  
  <p>I'd like to add a <code>CALayer</code> so that it is visible on top of my superview, but under my subview.
  In other words, my subview's background should override the layer.</p>
  
  <p>I've had a look at <code>addLayer:below:</code> and others, but I'm not sure how to use it.
  Thanks.</p>
  
  <p><strong>EDIT</strong>: My bad, I had another view between superview and subview, and I was messing with it. Thanks guys !</p>