问题
I would like to get some help on how to handle app (storyboard) is set to Universal.
When app run (with a single viewcontroller with a navbar) on a iPhone 5s simulator (with iOS 7.x), a thick black appears on top & bottom iPhone 5s with iOS 7.x SDK
When switch to iPhone 5.0 with iOS 8.x simulator, no issue. iPhone 5s with iOS 8.x SDK
Is there any code to fix (remove header & footer) gap in black?
回答1:
The thick black bars on top and bottom (also known as letterboxing) are because you have no launch image for the 4-inch screen. Add one. Without this, your app is treated as if it were running on a 4s (3.5-inch screen).
来源：https://stackoverflow.com/questions/26748546/ios-universal-storyboard-on-iphone-5-5s-issue