title: Upgraded app to iOS 7 - error "Auto Layout on iOS Versions prior to 6.0" (but want iOS 7 not older)
body: <p>I have an iOS app that worked well on all devices in iOS 6.</p>
  
  <p>I recently upgraded my xcode to version 5.0 and tried to build the same app for iOS 7 on an iPhone 5.</p>
  
  <p>On building the app, the xCode upgraded something in the code settings, but failed to build with errors.</p>
  
  <p>On the iPad XIB, I get an error : "Illegal Configuration : Auto Layout on iOS Versions prior to 6.0".</p>
  
  <p>I tried enabling and disabling the "Use Autolayout" checkbox in the File Inspector, but it didn't work.</p>
  
  <p>Please help me fixing this issue.</p>