title: Opening door effect using Core Animation
body: <p>I'm trying to create a transition/animation on a UIView that looks something like the image in the link below.  It would start with a UIView that is a standard rectangle shape, the view would then animate/transition like the left side is being pushed and it rotates on the right side corner, like a door opening slightly.  I'm sure this is a really easy thing to do in Core Animation, and I've tried searching for solutions, but haven't found any examples. </p>
  
  <p>Here's an example of what I am trying to achieve:</p>
  
  <p><img src="https://i.stack.imgur.com/wDy3p.jpg" alt="enter image description here"></p>