Question

Problem:
If user is not logged into GameCenter account – GameCenter authentication view is launched in portrait mode (in ios 5 there were a modal dialog) asking to log in. But if I disable Portrait mode in xcode (Project Summary) or in supportedInterfaceOrientationsForWindow: (as my app supposed to run in landscape mode ONLY) I get:

Terminating app due to uncaught exception ‘UIApplicationInvalidInterfaceOrientation’, reason: ‘Supported orientations has no common orientation with the application, and shouldAutorotate is returning YES’

If I enable Portrait for ipad/iphone (and/or comment out supportedInterfaceOrientationsForWindow:) it works without crash, but I don’t want portrait mode to be enabled.

Answer 1

While writing this question and experimenting with code, it seems that I’ve found a solution:
enable all orientations in project summary and remove application:supportedInterfaceOrientationsForWindow.

Add this code to ViewController:

- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskLandscape;
}

Now it works seamlessly.