问题
When a user is mid-editing a textfield on a tableview and decides to click the close button for the window, the changes he/she made does not get saved. How can I force a tableview (view based) to end editing (not abort editing) ?
回答1:
The simplest way to do this is to assign a delegate for your window and respond to NSWindow's -windowShouldClose: delegate method. In it, invoke -makeFirstResponder: to make the window itself the first responder, noting the BOOL answer it gives. You should return whatever -makeFirstResponder: answers as the answer to the delegate ...ShouldClose: message since it may not be able to end editing / resign first responder. Assuming it's successful, it'll end editing and trigger whatever action / bindings machinery you set up prior to actually closing. This works because NSTableView and the views it uses in view-based mode are subclasses of NSControl and automatically handles the responder status changes by ending editing, etc. Hope this helps.
来源：https://stackoverflow.com/questions/22383709/end-editing-on-nstableview-view-based