UINavigationController

extension UINavigationController


                    
                    
                    pushViewController(_:animated:completion:)

Pushes a view controller onto the receiver’s stack and updates the display with a completion handler.

This method also calls the pushViewController(_, animated:) of the UINavigation controller. The difference is that it has an attached completion closure to be executed once the presentation finishes. If the presentation is animated, the completion closure is executed at the same time as the view controller transition animations. Otherwise, if the presentation is not animated, the completion closure is executed in the main queue.

Declaration

Swift

public func pushViewController(_ viewController: UIViewController,
                               animated: Bool,
                               completion: (() -> Void)?)

Parameters

`viewController`	The `UIViewController` where it will be pushed into
`animated`	Specify true to animate the transition or false if you do not want the transition to be animated. You might specify false if you are setting up the navigation controller at launch time.
`completion`	The closure to execute after the presentation finishes. This closure has no return value and takes no parameters. You may specify nil for this parameter.


                    
                    
                    popViewController(animated:completion:)

Pops the top view controller from the navigation stack and updates the display with a completion handler.

This method also calls the popViewController(animated:) of the UINavigation controller. The difference is that it has an attached completion closure to be executed once the presentation finishes. If the presentation is animated, the completion closure is executed at the same time as the view controller transition animations. Otherwise, if the presentation is not animated, the completion closure is executed in the main queue.

Declaration

Swift

public func popViewController(animated: Bool,
                              completion: (() -> Void)?)

Parameters

`viewController`	The `UIViewController` where it will be pushed into
`animated`	Specify true to animate the transition or false if you do not want the transition to be animated. You might specify false if you are setting up the navigation controller at launch time.
`completion`	The closure to execute after the presentation finishes. This closure has no return value and takes no parameters. You may specify nil for this parameter.