View the center on the y axis when the view controller is integrated into the navigation controller

Question

Using auto-layout in Xcode 5, how can you center the view along the y axis when the view controller is built into the navigation controller.

I use storyboards and try to use an automaton. I have a navigation controller, and the root view controller on the nav controller is just a simple view controller with just a button in the view.

Now I can add the restriction "Center vertically in the container", but when I do that the button is centered in the entire view of the application, and not the actual view under the navigation controller.

View hierarchy:

Has the meaning?