iOS 9 Xcode 7 - Application appears with black bars on top and bottom

Did you migrate your app from an earlier version of Xcode? If so then Xcode is now making an assumption about your screen size and you need a way of indicating the actual screen size at run time.

There are two ways:

a) If you use a launch screen.

You are missing a LaunchScreen.storyboard file. Create a Launch Screen object from the New File... dialog

b) If you don't use a launch screen.

Go to your Target's settings and choose General, then App Icons and Launch Images. Now set "Launch Screen File" to your "main.storyboard" (or another storyboard if appropriate)

My App does not use a launch image. Setting the "Launch Screen File" to my "main.storyboard" file fixed the issue for me.

This setting can be found under "Target->General->App Icons and Launch Images"

Use the following link for more information: http://oleb.net/blog/2014/08/replacing-launch-images-with-storyboards/