Swift: How do I get access to the navigationController in AppDelegate

Question

I have added a NavigationController in the StoryBoard and made it the initial viewController. How do I get access to the NavigationController in the appDelegate. Ctrl-drag from navigationController to AppDelegate does not create an outlet.

Anceline

If it's your initial view controller you can access it through self.window.rootViewController – Recruitment

Answer 1

In didFinishLaunchingWithOptions:

let navigationController = application.windows[0].rootViewController as! UINavigationController

Ozone

Getting this SIGBART error : Could not cast value of type 'SwiftControlsTest.ViewController' (0x1006303f0) to 'UINavigationController' (0x101ecb670). – Tannatannage

That's because you don't have a navigation controller set as the root view controller of your application. Your root view controller is a SwiftControlsTest.ViewController – Joellejoellen

windows is deprecated as of iOS 15. Also, you'll get an error if you try to do self.window?.rootViewController in AppDelegate; you can, however, do this in SceneDelegate. – Unadvised

Answer 2

In custom functions use like this:

let navigationController = self.window?.rootViewController as! UINavigationController

Giraffe