title: Animated GIF alternative for iOS
body: <p>"Back in the day" animated GIFs were ubiquitous online.</p>
  
  <p>They were simple to use - just pop em' in wherever you want an animated image. </p>
  
  <p>I'd like to display an animated image within an iOS application (for example, a graphic illustrating a letter being opened from an envelope).</p>
  
  <p>But, I'm not sure how to go about this. </p>
  
  <p>Obviously I don't want to use an animated GIF.</p>
  
  <p>A video of some sort seems like it might be the preferred solution. But, what about transparency? Also, what about the retina display? </p>
  
  <p>Thanks.</p>