title: Devices in Device Specific image set in asset catalog
body: <p>I want to update my app for the new iPhone 6 and iPhone 6 Plus. To do so I selected an image set from my asset catalog in Xcode 6. As I develop only for iPhone I selected "Device Specific" in the Xcode Attribute Inspector. Now I can chose between the following devices:</p>
  
  <ul>
  <li>iPhone</li>
  <li>Retina 4-inch</li>
  <li>iPad</li>
  <li>Mac</li>
  </ul>
  
  <p>Selecting only <strong>iPhone</strong> I get these sizes:</p>
  
  <ul>
  <li>1x</li>
  <li>2x</li>
  <li>3x</li>
  </ul>
  
  <p>Selecting only <strong>Retina 4-inch</strong> gives me only one size:</p>
  
  <ul>
  <li>Retina 4 2x</li>
  </ul>
  
  <p>Why is the 4-inch screen different from 3.5, 4.7 and 5.5 inches? It would make sense in my view to combine <em>1x</em> and <em>2x</em> as they are both available on devices with a 4:3 aspect ratio and <em>Retina 4 2x</em> and <em>3x</em> for devices with a 16:9 aspect ratio.</p>
  
  <p>My real question: What do I need to provide in order to support iOS 7.0 and later? I obviously don't need a <em>1x</em> image as my app does not support any non-retina devices. <em>2x</em> seems reasonable for the iPhone 4s. Do I need <em>Retina 4 2x</em> if I provide <em>2x</em> already? Will the iPhone 6 use the <em>2x</em> or the <em>Retina 2x</em>? <em>3x</em> is for the iPhone 6 Plus, no question about that.</p>
  
  <p>Thanks for your help.</p>