- (NSUInteger)application:(UIApplication*)application supportedInterfaceOrientationsForWindow:(UIWindow*)window
{
	// No rootViewController setted because we are switching from one view controller to another, all orientations should enabled
	if ([window rootViewController] == nil)
		return UIInterfaceOrientationMaskAll;
	// Some presentation controllers (e.g. UIImagePickerController) require portrait orientation and will throw exception if not supported.
	// At the same time enabling all orientations by returning UIInterfaceOrientationMaskAll might cause unwanted orientation change
	// (e.g. when using UIActivityViewController to "share to" another application, iOS will use supportedInterfaceOrientations to possibly reorient).
	// So to avoid exception we are returning combination of constraints for root view controller and orientation requested by iOS.
	// _forceInterfaceOrientationMask updated in willChangeStatusBarOrientation, which called if some presentation controller insists on orientation change.
	return [[window rootViewController] supportedInterfaceOrientations] | _forceInterfaceOrientationMask;
}