Methods you use to track editing-related changes in a canvas view.
Implement the methods of the PKCanvasViewDelegate protocol to monitor drawing-related events happening in a PKCanvasView object. Specifically, determine the start and end-of-event sequences using the currently selected tool, and determine when those events affect the drawn content.
The object you use to respond to changes in the drawn content or in the selected tool.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.