Everything I've seen seems to suggest that tab bars should be added to the UIWindow from within the app delegate. I note that the Elements example does this. However, in my app I'd like to have a tab bar on a page which lies a couple levels deep (using nav controller). This page shows a list of data and I'd like to use the tab bar to be a means of re-ordering that data in different ways, similar to the Elements example, only from deeper in the app. I know the docs say to not add a tab bar controller to a nav controller, but does this apply for tab bar controllers composited in a "normal" view controller as well? My testing seems to be confirming that tab bar controllers indeed cannot be used in any way from within a nav controller stack. Any quick pointers would be appreciated. TIA.