title: How to Set Superview From Outside of Delegate?
body: <p>I have a weird design pattern for one of my aps where I have a tool bar that acts as a tab bar. Basically I add this toolbar to all of my view controllers, and the tool bar itself contains pointers to the 3 different nav controllers in my app. When one of the toolbar buttons is pushed, it should be able to remove the nav controller that currently is on the window, and add the one the user has selected. My problem is I'm not sure how to add the new navcontroller to the superview. Would I instantiate an app delegate object and add it to that? Or would I need to send a pointer from my app delegate to the tool bar as a class variable? Any help would be appreciated.</p>