I have developed a new app from scratch using Xcode 6. I have built the app in the "Base" and I set the constraints for all iphones and works perfect. When I run the app on iPhone 5 or iPhone 5S for iOS 7 I have a black space from the top of the screen but the app is fine for theses devices on iOS8. (I added all the launchimages for all iOS(7+8) and for all sizes. This is a screenshot with the issue:
