The navigation bar managed by the navigation controller.
- iOS 2.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
It is permissible to customize the appearance of the navigation bar using the methods and properties of the
UINavigation class but you must never change its
alpha values or modify its view hierarchy directly. To show or hide the navigation bar, you should always do so through the navigation controller by changing its
navigation property or calling the