Instance Method

presentationController(_:willPresentWithAdaptiveStyle:transitionCoordinator:)

Notifies the delegate that an adaptivity-related transition is about to occur.

Declaration

optional func presentationController(_ presentationController: UIPresentationController, willPresentWithAdaptiveStyle style: UIModalPresentationStyle, transitionCoordinator: UIViewControllerTransitionCoordinator?)

Parameters

presentationController

The presentation controller that is managing the adaptivity change.

style

The new presentation style. If the presentation style is not changing, this parameter is set to UIModalPresentationStyle.none.

transitionCoordinator

The transition coordinator that is managing the transition.

Discussion

When a size class change occurs, UIKit calls this method to let you know how the presentation controller will adapt. Use this method to make any additional changes. For example, you might use the transition coordinator object to create additional animations for the transition.