title: Make iOS application compatible with iPhone6 and iPhone6+ sizes
body: <p>I have created an application in which I have used an .xib for layout. Currently I use two different .xibs, one for iPhone4 320*480 and one for iPhone5 320*568. I am not using auto layout.</p>
  
  <p>Now iPhone6 and iPhone6+ are available, with two different sizes, 4.7 inch and 5.5 inch.</p>
  
  <p>How can I make my app compatible with these sizes?</p>