title: Animated Images in a UIButton
body: <p>What is the best way to animate images of a button?</p>
  
  <p>Say I want to cycle through like 6 frames and have the user still be able to click the button?</p>
  
  <p>Should I animate the images and just have an invisible button on top of it in interface builder?  </p>
  
  <p>Is there a way to animate them within defining the <code>UIButton</code>?</p>
  
  <p>Or is it better to animate images and find the users touch point and act on that?</p>