How can "First Responder" be used in a xib file?

Question

i read about responder chains, and basically i read about how the events from the UI are passed up on the responder chain, how to handle them and how to pass along. I also used -becomeFirstResponder and -resignFirstResponder, but i was using these only for basic tasks, like showing keyboard on iOS and handling shake events.

What I would like to know is how can I use the "First Responder" proxy object in the MainWindow.xib that Xcode generates. I see some received actions and also i see that i can create actions on the Identity inspector tab.

So my question is: how can I use these actions, and when should I use this proxy object in IB ?!

Thanks in advance.

Answer 1

Assigning an action to the first responder object is the same as adding an action to a control with a nil target programatically. When the action is triggered, the application will go through the responder chain and send the action to the first responder that accepts it. On the mac, it is often used to automatically send menu commands to the current window or document. You should use it if you have multiple objects which you want to send messages to with the same button.