The completion process of the event's processing

1. The complete process of the event:
1> the event object from the top down (passed by the parent control to the child control), finds the most appropriate control to handle the event
2> calls the touches of the most appropriate control ..... Method
3> if a [super touches ...] is called; Will pass the event along the responder chain to the previous responder
4> then calls the last responder's touches .... Method


2. What is the responder chain?
1> Responder chain is a chain of multiple responder objects (what is the Responder object: the object that can handle the event)
2> uses the responder chain to allow multiple controls to handle the same touch event
3> How to use the chain to pass up? Who was the last responder


3. Who is the previous responder (Nextresponder)
1> If the current view is a view of the controller, then the controller is the last responder
2> If the current view is not the controller's view, then the parent control is the last responder

The completion process of the event's processing