问如何在选项卡栏中安装NavigationController作为根视图？

EN

// First create your RootViewController:
UIViewController *rootViewController = [[UIViewController alloc] init];
// Then add the rootViewController to a UINavigationController
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:rootViewController];
// Now your RootViewController is a UINavigationController
// Add it to your UITabBarController
[tabBarController.viewControllers addObject:navigationController];
// You can now get rid of the RootViewController and UINavigationController
[rootViewController release];
[navigationController release];