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

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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.