Objective C - Accessing UINavigationController from TabController application

How can I access the UINavigationController from the AppDelegate class in a UITabBarController application?

Like when I'm in a section within the UITabBarController item, I can do self.navigationController.

However, that doesn't exist in the AppDelegate.

Thank 开发者_开发百科you,

Tee

There's no correspondence between navigation controller and app delegate the way there is between navigation controller and the view controllers under it. If your app delegate sets up the navigation controller for a given tab item, it can certainly keep a reference to it in a property or ivar, but you'll need to manage that yourself.