The Navigation Controller oversees in the navigation interface one or more child view controllers. In nearly all iOS applications, navigation controllers are used. Although one or several children's view controllers are maintained in a navigation stack, only one view controller is displayed on the screen. The view controller pushes a new viewer on the screen to select an item. The above view controller is animated and is hidden. See the browser interface that is utilised in the iOS settings app.
In the Navigation Controller, all view controllers feature a browsing bar with the titles and back button of the view controller. Tap the back button and remove the top view controller from the navigation stack. The back button for the root view of the stack is not given.
The View Controller is managed in the orderly array by a navigation controller which considers both the root view controller and the navigation stack bottom as the first item. The last item in the array is the top view controller currently shown. Using UINavigationController methods, we may push or pop View Controllers into the stack.
In addition, the navigation control maintains the navigation bar for all navigation stack view controllers, always displayed at the top of the screen. An optional toolbar at the bottom of the screen is also managed by the navigation control.
The behaviour of a navigation controller is maintained via a delegate object. The custom animations can be provided to push and pop the view controllers. The preferred navigation interface orientation can also be specified.
