title: black space in IOS app in 4inch Screen
body: <p>I am creating an App for IOS7 for both retina 4inch and 3.5 inch, when my target version is IOS7 every thing wrks fine. But when i set the version below 6.1 then there is a white space at the top and bottom bar. when i run it in IOS6.1 Simulator 4inch i get something like this.
  I have the Default-568h@2x.png for IOS6.1 and prior also in place.
  I am using Xcode 5DP</p>
  
  <p><img src="https://i.stack.imgur.com/f3jsD.png" alt="enter image description here"></p>
  
  <p>Screen shot when app has target version 7 
  <img src="https://i.stack.imgur.com/xy5ya.png" alt="enter image description here"></p>
  
  <p>Any help will be appreciated </p>