Unity 5 Personal iOS Splash Screen Problem

For some reason when I build to my iPhone 5s to test my game out, the background will be gray and the Unity splash screen will not show up and then it will flash the unity logo very briefly (1/10 second), then the game starts. Sometimes the logo won’t even come up and just have that gray background until my game starts. This obviously looks awful and don’t want to put my game on the Apple App Store this way. This problem has persisted for a while now. I’m using Unity 5.3.4f1 and Xcode 7.3.1 currently, but this issue has gone on for previous versions of each program. I’ve searched on how to fix this to no avail, so any help would be greatly appreciated!!
Thank you

Hi,
I already such a problem and I had resolved with : ios 9 objective-c screen size issues