YES if a responder object handled the action message, no if no object in the responder chain handled the message.

如果接受对象接收到事件信息就返回YES，在响应链中没有对象响应消息就返回NO。

youdao

Channels send each object along a chain of channel sink objects prior to sending or after receiving a message.

信道在发送消息之前或接收消息之后沿信道接收器对象链发送每个对象。

youdao

Channels send each object along a chain of channel sink objects prior to sending or after receiving a message.

信道在发送消息之前或接收消息之后沿信道接收器对象链发送每个对象。

youdao