UIPageControl design challenge

My app has a UITabBarController that loads many different UINa开发者_JAVA技巧vigationControllers. I want a UIPageControl to switch between the different UINavigationControllers. Do I place the UIPageControl in my UINavigationController or in my appDelegate? Suggestions and best practices are welcome.

I'm a relative noob, but I believe the UIPageControl is just an element that you send messages to to visually display to users what page they're on within a set of pages. My understanding is that UIPageControl is not a "controller", but just a visual queue element. Thus, I believe it belongs near the view element that's being paged through by the user.

I could be wrong.