Objective-c Small Talk: The law of Use of agent delegate

Find out who's Who's agent first (delegate)

Define proxy protocols, naming conventions for protocol names: control class name + Delegate

Defining proxy methods

Proxy methods are generally defined as @optional

Proxy method names begin with the control name

The proxy method has at least 1 parameters, passing the control itself out

Set proxy (delegate) object (e.g. myview.delegate = xxxx;)

Proxy Object Compliance Protocol

The implementation method of the Proxy object Implementation protocol

Invoke proxy object (delegate) proxy method at the right time to notify the agent what's going on

(Determines whether the agent implements the proxy method before calling)

Objective-c Small Talk: The law of Use of agent delegate