Get notified when NSTextField resigns first-responder status without subclassing

Question

I have an NSTextField which I add to the view hierarchy of my custom view and set the position for when the user clicks inside that custom view.

If the text field resigns first-responder status, e.g. because the user has clicked inside another NSTextField in the window, I need to fetch its value and remove it from the view hierarchy again.

How can my custom view get notified of the NSTextField it owns resigning first-responder status without having to subclass this text field just for this single purpose?

The NSTextFieldDelegate method control:textShouldEndEditing: won't do because it only gets called when the user actually edited something in the text field. I also need to hide the text field if the user didn't make any edits in it.

Answer 1

NSTextField losing focus can be caught by :

- (void)controlTextDidEndEditing:(NSNotification *)aNotification

Answer 2

One more delegate method is there which will do the same thing:-

- (BOOL)control:(NSControl *)control textView:(NSTextView *)textView doCommandBySelector:(SEL)command
{
    if (command==@selector(insertTab:) || (command==@selector(insertBacktab:)))
    {
      //Your Code
    }
    return YES;
}

Note:- It will work only for tab and backTab key