Can't copy or paste text in Cocoa after deleted edit menu item

I can't copy or paste any text on nstextfield after deleted edit menu item o开发者_运维知识库n Interface Builder. I've re-added edit menu item but still can't. Anyone know how to fix it ?

Thanks in advance.

You need to reconnect the menu items to a target. In this case, connecting the selector property of the item to the First Responder's appropriate action method will do the trick.

You need to send the cut:, copy: and paste: messages to the First Responder from the "Sent Action" of the respective menu items.