title: How to port an app from old iPhone to iPhone 4? (Retina Display)
body: <p>Sorry if im asking something stupid but please dont shoot me down!</p>
  
  <p>I have done a little playing in xcode but nothing more than a button press counter kindof thing..</p>
  
  <p>I was curious.. when developing with the retina display in mind you obviously produce higher resolutions png's and what not for the new display..</p>
  
  <p>How would you go about making the app run on a lower resolution iPhone?</p>
  
  <p>Would you use the same high res graphics and have the OS do the rest of the work or do you need to write in a chunk of code to switch the graphics based on the device?</p>
  
  <p>Again sorry if its in the documentation but i couldnt find it!</p>
  
  <p>Thanks in advance..</p>
  
  <ul>
  <li>Daniel</li>
  </ul>