title: iphones 5, 6 don't show splash screen
body: <p>I've added splash screen images both to the project folder and to images.xcassets file, however only iPhone 4s (with ios7) shows the splash screen, the others (with ios8) show default launch screen or don't show anything if launchscreen.xib is deleted. </p>
  
  <p>what can cause it for iPhones >= 5 ? the files' names are :
  Default@2x.png, Default-568h@2x.png, Default-667h@2x.png, Default-Portrait-736h@3x.png</p>