objective c - iPhone - application displays a blank screen when loaded on a real device (sometimes) -


i have iphone application runs fine on simulator , runs fine on real device when connected mac , attached xcode debugger.

i can close app , open again no problem.

however when remove device mac usb , try use application tries load , gets stuck on blank black screen. other times load , if press home button , launch app again launches fine.

the device setup debugging , place app on running on xcode, problem? need change apps settings run on device without issue release version or along lines?

edit:

i have additional info seems reproduce everytime.

it happens if push app background pressing home button, leave device lying there around 5 minutes , when click on icon launch app again see app split second , black screen


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