Protocols

The GeneratorDelegate protocol defines methods that allow you to respond to changes that are made to a generator.

The FontSelectorViewDelegate protocol defines methods that allow you to respond to the events of an instance of FontSelectorView.

A view controller that is pushed onto a toolbar controller must implement this protocol if it wants to present a toolbar item in the toolbar.

To use a custom progress HUD when saving a photo or while downloading stickers etc., your progress view must implement this protocol.

The ScalePickerDelegate protocol defines a set of methods you can use to receive value-change messages for ScalePicker objects.

The CanvasViewDataSource protocol defines methods that allow you to pass needed information to the canvas view.

The CanvasViewDelegate protocol defines methods that allow you to react to changes of the canvas view.

The PhotoEditToolControllerDelegate protocol defines methods that allow you respond to the events of an instance of PhotoEditToolController.

The PhotoEditViewControllerDelegate protocol defines methods that allow you to respond to the events of an instance of PhotoEditViewController.

Every frame builder must implement this protocol.

The methods declared by the CropAndStraightenViewDelegate protocol allow the adopting delegate to respond to message from the CropAndStraightenView class and thus respond to operations such as tracking.

A TransitionAnimator provides a custom transition animation.

Consumers of analytics screen views and events must implement this protocol. You can then forward all screen views and events to an analytics service of your choice. To receive events you must register your AnalyticsClient instance with Analytics.addAnalyticsClient(_:).

A controller that implements TransitionProviding provides a custom transition animator to use when presenting or dismissing the controller.