Removing NavigationController Programmatically

Question

the application contains more than one navigation controller. (example below)

NavigationController1 ----> ViewController1 ---> TabBarController -->          


        

Answer 1

The black screen is nothing but UIWindow. When you are removing NavigationController , the windows doesn't have any NavigationController. So you will have to set NavigationController for window as soon as you remove your first NavigationController.

You can try like this:

 let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate

 appDelegate.window?.rootViewController = YOUR_NAVIGATION_CONTROLLER_OBJECT;

Answer 2

May be this can help:

[self.window addSubview:secondNavigationController.view];

Add the view of second navigation controller in the window.