How to set view outlet for a UIViewController that contains a UITabBarController?

I have a UIViewController that contains a UITabbarController which contains a UINavigat开发者_JS百科ionController.

When I am setting up my IB outlets, what should the File's Owner view outlet be set to?

I think that it should be set to UITabbarController. Later, if you need to access to UINavigationController just call like this [tabBar.navigationController pushViewController:animated];