Using Multiple Controllers with UINavigationController
Although some iOS apps are famous for their unique visuals, most apps share a common set of interface elements and interactions included with the SDK. Typical apps will have a persistent top bar (usually blue) with a title and some buttons; these apps use an instance of UINavigationController, one of the standard container controllers in iOS.
Containers are UIViewController subclasses that manage many other child UIViewControllers. Kind of wild, right? Containers have a view just like normal controllers, to which their children controllers’ views are added as subviews. Containers add their own UI around their children and resize their subviews accordingly. UINavigationController adds a ...
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