changedTouches

The touch points that contributed to the event.

Meaning of these points varies depending on the event type.

• For TOUCH_START, it is a list of the touches that became active with this event.
• For TOUCH_MOVE, it is a list of the touches that have changed since the last event.
• For TOUCH_CANCEL and TOUCH_END, it is a list of the touches that have just been removed, and no longer present on the screen.