title: Creating a bounding box for a UIImageView
body: <p>How can a bounding box be created for a UIImageView that is not a CGRect?</p>
  
  <p>I would like to have objects in my view which should display images as well as detection collisions.  </p>
  
  <p>The issue is I would like these object to be whatever shape they are rather than fitting them into a CGRect and detecting collisions on areas which are inside the box but are nit the actual image.</p>
  
  <p>How does one achieve this?</p>