flypigz
in the didFinishLaunchingWithOptions method, should replace the DemoMenuController as DemoRootViewController in below codes: ``` for (int i=0; i<8; i++) { DemoMenuController *rootViewController = [[DemoMenuController alloc] init]; [rootViewController setTitle:[NSString stringWithFormat:@"Root VC %i", i+1]]; UINavigationController *rootNavController = [[UINavigationController alloc] initWithRootViewController:rootViewController]; [viewControllers addObject:rootNavController]; } ```