title: Making an animation to expand and shrink an UIView
body: <p>I want to create an animation that will resize an UIView and its contents by a factor. Basically, I want to make an animation that first expands the view then shrinks it back to the original size.</p>
  
  <p>What is the best way to do this? I tried CALayer.contentScale but it didn't do anything at all.</p>