ios - 将 UINavigationController 添加到现有 UIViewController 的正确方法

Question

我正在尝试通过在 ViewDidLoad 中添加一个 UINavigationController 到我现有的 View Controller :

- (void)viewDidLoad
{
    [super viewDidLoad];

    navController = [[UINavigationController alloc]init];

    [self.view addSubview:navController.view];
}

但是这样一来，完全挡住了我的视线。它将 UINavigationBar 放在顶部，但 View 的其余部分不响应输入。

这就是我呈现观点的方式。 SecondViewController 是我想要的 NavController:

UITabBarController *tabController = [[UITabBarController alloc] init];

FirstViewController *viewController1 = [[FirstViewController alloc] initWithNibName:@"CardsViewController" bundle:nil];

UITabBarItem *tab1 = [[UITabBarItem alloc] initWithTitle:@"First" 
                                                   image:[UIImage imageNamed:@"img1.png"] tag:1];
[viewController1 setTabBarItem:tab1];    

SecondViewController *viewController2 = [[SecondViewController alloc] initWithNibName:@"ShoppingViewController" bundle:nil];

UINavigationController *SecondViewNavCont = [[UINavigationController alloc]initWithRootViewController:viewController2];

UITabBarItem *tab2 = [[UITabBarItem alloc] initWithTitle:@"Second" 
                                                   image:[UIImage imageNamed:@"img2.png"] tag:2];
[SecondViewNavCont setTabBarItem:tab2];

UIViewController *viewController3 = [[UIViewController alloc] init];
UITabBarItem *tab3 = [[UITabBarItem alloc] initWithTitle:@"Third" 
                                                   image:[UIImage imageNamed:@"img3.png"] tag:3];
[viewController3 setTabBarItem:tab3];


tabController.viewControllers = [NSArray arrayWithObjects:viewController1, 
                                 viewController2, 
                                 viewController3, 
                                 nil];

[self.view addSubview:tabController.view];

Answer 1

你不能将它添加到当前 View Controller 您需要做的不是呈现 ViewController，而是将此 viewcontroller 添加到 navigationview Controller 并呈现它

UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:YourPresentedViewController];
//then present the navController
[self presentModalViewController:navController animated:YES];

现在，当您展示它时，请执行以下操作

NSArray arrayWithObjects:viewController1, 
                                 SecondViewNavCont, 
                                 viewController3, 
                                 nil];