title: Creating iOS Universal App, How To Detect All 5 Resolutions?
body: <p>Title pretty well says it. I'm creating an iOS app and am at the point of add art assets. I have 5 backgrounds for iPhone low res(iPhone 3GS or lower ), iPhone retina (iPhone 4 or higher), iPhone 5, iPad low res, and iPad high res. </p>
  
  <p>What's the best way to handle which background gets loaded based on the device?</p>
  
  <p>Also, is there a way to test what all 5 looks like in the simulator? Right now, of course, you can only test iPhone and iPad.</p>
  
  <p>Also, this is a game and I'm using cocos2d if that would make a difference.</p>