size classes - Project which created on Xcode 6 is not shown as full screen -

size classes - Project which created on Xcode 6 is not shown as full screen -

i'm considering convert old projects used xibs storyboard. created new project test size classes , run on simulator(iphone 5s(7.1)) screen not total screen.

even turned size classes alternative off, symptom's still exist. why happen? how can prepare it?

ok found answer. ios 7.x not back upwards launchscreen.xib. after added default-568h@2x.png, default.png, default@2x.png, screen full.

xcode size-classes