previewInteraction(_:didUpdateCommitTransition:ended:)
Informs the delegate of the preview interaction’s progress through the commit phase.
Declaration
optional func previewInteraction(_ previewInteraction: UIPreviewInteraction, didUpdateCommitTransition transitionProgress: CGFloat, ended: Bool)Parameters
- previewInteraction:
The preview interaction associated with the current user input.
- transitionProgress:
The progress through the commit phase of the transition. A Cgfloat Swift.struct with a value from
0to1. - ended:
A
Booleanwhose value indicates whether the commit phase of the transition is complete.
Discussion
This method is called repeatedly during the commit phase of the preview interaction. Use the supplied transitionProgress parameter to update the UI to reflect the progress of the interaction. For example, the pop effect in view controller preview transitions progressively increases the size of the child view controller as the transition progresses.
The ended parameter is false throughout the commit phase and becomes true when the phase is completed. At this point, the preview interaction is complete, and you should update the UI appropriately. For example, in view controller preview interactions, the child view controller becomes the main view controller.