Instance Method

viewWillAppear(_:)

Notifies the view controller that its view is about to be added to a view hierarchy.

Declaration

@objc override dynamic func viewWillAppear(_ animated: Bool)

Parameters

animated

If true, the view is being added to the window using an animation.

Discussion

SwiftUI calls this method before adding the hosting controller's root view to the view hierarchy. You can override this method to perform custom tasks asssociated with the appearance of the view. If you override this method, you must call super at some point in your implementation.