A device with a touch-sensitive surface detects one or more touches that start within a view on the touch-sensitive surface, and processes the one or more touches on the touch-sensitive surface with a software element associated with the view. The device receives, at the software element associated with the view, a touch event that includes data structure including a phase value indicating that a respective touch on the touch-sensitive surface has been canceled by the device. The device responds to receiving the touch event by ignoring the respective touch on the touch-sensitive surface.