message: Removed root for clarity
diff: rootView.backgroundColor = [[UIColor alloc] initWithRed:1.0f green:1.0f blue:1.0f alpha:1];
  self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
  - UIViewController *rootViewController = [UIViewController new];
  - rootViewController.view = rootView;
  - rootViewController.title = @"Scene";
  - rootViewController.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemSearch tag:0];
  - UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:rootViewController];
  + UIViewController *viewController = [UIViewController new];
  + viewController.view = rootView;
  + viewController.title = @"Scene";
  + viewController.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemSearch tag:0];
  + UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
  UITabBarController *tabBarController = [[UITabBarController alloc] init];
  [tabBarController setViewControllers:@[navigationController]];
  self.window.rootViewController = tabBarController;
  