Tells the delegate that the specified view controller is about to be hidden.
- iOS 2.0–8.0Deprecated
The split view controller that owns the specified view controller.
The view controller being hidden.
A button you can add to your toolbar.
The popover controller that uses taps in
barto display the specified view controller.
When the split view controller rotates from a landscape to portrait orientation, it normally hides one of its view controllers. When that happens, it calls this method to coordinate the addition of a button to the toolbar (or navigation bar) of the remaining custom view controller. If you want the soon-to-be hidden view controller to be displayed in a popover, you must implement this method and use it to add the specified button to your interface.