UINavigationController issue in iOS7

#if EXPERIEMENTAL_ORIENTATION_SUPPORT
UINavigationController *container = [[UINavigationController alloc] initWithRootViewController:navController];
// UINavigationController *container = [[UINavigationController alloc] init];
[container setNavigationBarHidden:YES animated:NO]; [container setViewControllers:[NSArray arrayWithObject:navController] animated:NO];
self.window.rootViewController = container;#else
self.window.rootViewController = navController;
#endif

the above code is working fine in iOS6 but not in iOS7.

i don't know what change in iOS7 UINavigationController. So, plzzz do help!

Thanks!