ios build hangs at splash screen

i have created a game which run good in unity and in android and i want to release it in IOS but the game hangs at splash screen, and not showing any error’s in Xcode .

i’m using unity 4.6.4p1and Xcode 6.2 … i have tried so many solutions that i found in the internet but still no result .

please some one guide me out …

use an app like deviceconsole to capture the iOS log and look for clues.