Question

So I have the following hierarchy:

UINavigationController –> RootViewController (UIViewController) –> UITableViewController –> DetailViewController (UIViewController)

I want to lock the orientation on RootViewController to Portrait only, but leave all orientations for the rest view controllers.

If I put this to subclassed UINavigationController:

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

-(NSUInteger)supportedInterfaceOrientations{
    return UIInterfaceOrientationMaskPortrait;
}

All view controllers are then locked to portrait.

My question is, is there a way to lock only RootViewController to Portrait, but leave all options for other view controllers?

Answer 1

check the link here for fixing autorotation in iOS 6 and set orientation support per view basis: http://www.disalvotech.com/blog/app-development/iphone/ios-6-rotation-solution/

Here is what you could do:

1. Create a custom navigation controller that is a subclass of UINavigationController, in your .m file:

    - (BOOL)shouldAutorotate
    {
         return self.topViewController.shouldAutorotate;
    }
    - (NSUInteger)supportedInterfaceOrientations
    {
         return self.topViewController.supportedInterfaceOrientations;
    }
   

2. In your AppDelegate.h,

     @interface AppDelegate : UIResponder <UIApplicationDelegate> {
   
         UINavigationController *navigationController;
         ViewController *viewController;
     }
   
     @property (strong, nonatomic) UIWindow *window;
     @property (strong, nonatomic) ViewController *viewController;
   

   and in AppDelegate.m,

     - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
     {
           // set initial view
          self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
   
          viewController = [[ViewController alloc] initWithNibName:@"RootViewController" bundle:nil];
   
          navigationController = [[CustomNavigationController alloc]
                       initWithRootViewController:viewController]; // iOS 6 autorotation fix
          [navigationController setNavigationBarHidden:YES animated:NO];
   
           self.window = [[UIWindow alloc]
              initWithFrame:[[UIScreen mainScreen] bounds]];
   
           [self.window setRootViewController:navigationController]; // iOS 6 autorotation fix
           //[self.window addSubview:navigationController.view];
   
           [self.window makeKeyAndVisible];
   
   
            return YES;
     }
   
   
     - (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window  // iOS 6 autorotation fix
     {
             return UIInterfaceOrientationMaskAll;
   
     }
   

3. in your rootViewController, for whatever the event push the second view controller, do this:

     - (IBAction)pushSecondViewController:(id)sender {
   
       // push second view controller
       SecondViewController *secondViewController = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];
       [self.navigationController pushViewController:secondViewController animated:YES];
      }
   

4. in your each view controller, add

      - (BOOL)shouldAutorotate{}
      - (NSUInteger)supportedInterfaceOrientations{}
   

   for iOS 6, you can set each view controller whatever the orientation support you want individually.

   for iOS 5 and below, you can set

      - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{}
   

All the credits goes to John DiSalvo who wrote the sample app in the link.

Hope this helps.