Question

In a class I do something like the following:

- (void)windowDidLoad
{
    [super windowDidLoad];

    [[NSNotificationCenter defaultCenter] addObserver:self 
                                             selector:@selector(windowWillClose:) 
                                                 name:NSWindowWillCloseNotification 
                                               object:self.window];
}

- (void)windowWillClose:(NSNotification *)notification {
    NSLog(@"closing");
}

Then I subclass this class. There’s only one problem. When I subclass this class, the notification is never sent. Is there a reason for this?

Answer 1

Does your subclass override windowDidLoad and/or windowWillClose:? If so, do your subclass’s implementation(s) call super?