App is running wrong on iOS 7.1(screen size)

Question

When I run the app on iOS 7.1, I have a problem with screen size. On iOS 7.1 it is smaller than it should be(between black spaces). Where to move to find the error? Thanks.

Here is the screenshots:

iOS 7.1:

iOS 9.1:

Answer 1

Assuming you have setup a launch screen storyboard, you need to realize that it will only be used on devices with iOS 8.0 or later. For older versions of iOS, you still need to provide all of the appropriate launch images.