iOS Development-Advanced ui-responder Chain

The process of delivering a complete touch event with a delivery response
UIApplication---UIWindow to find the most appropriate control for handling events
The control calls the touches method and determines whether the touches method is implemented, and no implementation defaults to passing the event to the previous responder--Finding the previous responder
PS: If it doesn't respond to uiapplication, then the event is discarded.
1. Responder chain: A chain that is linked together by a number of respondents
Responder: An object that inherits from Uiresponder is called a responder object
2. Previous responder (the default practice is to pass the event up the responder chain, handing the event to the previous responder for processing)
How can I tell who is the last responder of the current responder?
1> determines whether the controller is currently a view, and if so, the last responder is the controller
2> If the view is not currently a controller, the previous responder is the parent control
3. What is the use of the responder chain?
Allows multiple responders to respond to the event at the same time when a touch event is audible
Touchesbegan in the implementation file of the subclass: Add the following code to the method
[Super Touchesbegan:touches Withevent:event];

iOS Development-Advanced ui-responder Chain