Question

我有一个UINavigationBar，里面有一个AuthenticateViewController。然后当用户登录导航控件的右上角时，我想显示一个UITabBar控制器。我还在appDelegate中创建吗？如何“突破”UINavigation控制器？

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.

// Add methods for layout of this view controller here

//1
AppDelegate* appDelegate = [UIApplication sharedApplication].delegate;
//2
self.managedObjectContext = appDelegate.managedObjectContext;

[self.navigationItem setHidesBackButton:YES];

// Now add the Sign In button
UIBarButtonItem *signinButton = [[UIBarButtonItem alloc] initWithTitle:@"Sign In" style:UIBarButtonItemStylePlain target:self action:@selector(signinButtonPressed:)];

self.navigationItem.rightBarButtonItem = signinButton;
}

- (void) signinButtonPressed:(UIBarButtonItem *) sender
{
    // What goes here to start the UITabBars
}

Answer 1

登录后将TabBarController设为rootViewController。

您的按钮操作如下：

UITabBarController *tabBarController = [[UITabBarController alloc] init];
tabBarController.viewControllers = @[<your viewControllers>];

AppDelegate *appDelegate = [UIApplication sharedApplication].delegate;
[appDelegate.window setRootViewController:tabBarController];

编辑：您可能无法使用@[]创建数组。所以这是一个解释：

UIViewController *viewController1 = [[UIViewController alloc] init];
UIViewController *viewController2 = [[UIViewController alloc] init];

// Two methods of adding item to array

// First method
NSArray *array = [NSArray arrayWithObjects:viewController1, viewController2, nil];

// or 
NSArray *array = @[viewController1, viewController2];

tabBarController.viewControllers = array;

Answer 2

您需要modalTransition跳出navigationController ..这会将AuthenticateViewController保持为RootViewController window RootViewController如果您想要更改RootViewController，那么您需要获取AppDelegate的窗口，并将其TabBarController更改为{{1}}您＆＃39}在这里做...希望你明白了......

在打破UINavigationBar后获取UITabBar

2 个答案: