UINavigationController和UITabBarController合用。

 FirstViewControlle *firstViewControlle = [[FirstViewControlle alloc] init];
     UINavigationController *nav1 = [[UINavigationController alloc] initWithRootViewController: firstViewControlle];
     UITabBarItem *time = [[UITabBarItem alloc] initWithTitle: @"First" image: nil tag: 0];
     nav1.tabBarItem = time;

     SecondViewController *secondViewController = [[SecondViewController alloc] init];
     UINavigationController *nav2 = [[UINavigationController alloc] initWithRootViewController: secondViewController];
     UITabBarItem *time2 = [[UITabBarItem alloc] initWithTitle: @"second" image: nil tag: 1];
     nav2.tabBarItem = time2;

     UITabBarController *tabBarController = [[UITabBarController alloc] init];
     NSArray *array = [NSArray arrayWithObjects: nav1,nav2, nil];
     tabBarController.viewControllers = array;

     [self.window addSubview: tabBarController.view];