Why i can not push a view controller in my navigationController?

In my navigation based application, first view is sign in or signup view. After that i am using a view which is using tab view controller. That view h开发者_JAVA百科as three tab items. Now i want to create a new view and push in navigationController. But its not working. But adding new view as subView in tabBarController View works. I want navigation for subViews for each tabBarItem? How can i do that?

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See this

In your case just create three items and make them all UINavigationControllers like the first tab item in the above example.