excerpt to programmatically create a menu in OS X

gistfile1.txt

    NSMenu* menubar = [NSMenu new]; 

    NSMenuItem* appMenuItem = [NSMenuItem new];
    [menubar addItem:appMenuItem];

    [NSApp setMainMenu:menubar];

    NSMenu* appMenu = [NSMenu new];

    NSString* toggleFullScreenTitle = @"Toggle Full Screen";
    NSMenuItem* toggleFullScreenMenuItem = [[NSMenuItem alloc] initWithTitle:toggleFullScreenTitle
                                                 action:@selector(toggleFullScreen:)
                                          keyEquivalent:@"f"];
    [appMenu addItem:toggleFullScreenMenuItem];

    NSString* quitTitle = [@"Quit " stringByAppendingString:appName];
    NSMenuItem* quitMenuItem = [[NSMenuItem alloc] initWithTitle:quitTitle
                                                 action:@selector(terminate:)
                                          keyEquivalent:@"q"];
    [appMenu addItem:quitMenuItem];

    [appMenuItem setSubmenu:appMenu];