更改情节提要后未调用Tabbar委托方法

Question

我在登录情节提要中没有登录和注册视图控制器，而在主情节提要中没有。

一旦注册成功或登录成功，然后将Login Storyboard更改为Main。 以下代码有效，但是当我选择任何选项卡时，它不会在AppDelegate中调用选项卡委托方法

但是，如果用户已经成功注册或登录，则它将调用以下选项卡委托方法。

LoginViewController.m

if(isLoginSuccess)
{
    UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    CustomTabBarViewController *tbc = [mainStoryboard instantiateViewControllerWithIdentifier:@"tabbar"];
    tbc.selectedIndex = 2;
    [self presentViewController:tbc animated:YES completion:nil];
}

AppDeletage.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    CustomTabBarViewController *tabBarController = (CustomTabBarViewController *)self.window.rootViewController;
    tabBarController.delegate = self;
    return YES;
}

-(void) tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{
    if (tabBarController.selectedIndex == 2) {
        if(![self isRegistered])
        {
            UIStoryboard *loginStoryboard = [UIStoryboard storyboardWithName:@"LoginStoryboard" bundle:nil];
            UIViewController *vc = [loginStoryboard instantiateViewControllerWithIdentifier:@"LoginViewController"];
            [ROOTVIEW presentViewController:vc animated:YES completion:nil];
        }
        else
        {
            tabBarController.selectedIndex = 2;
        }
    }
}

更新：

没有调用AppDelegate，但我想知道为什么以下代码在用户注销后无法在AppDelegate中打开Loginstoryboard。

#define ROOTVIEW [[[UIApplication sharedApplication] keyWindow] rootViewController]


UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"LoginStoryboard" bundle:nil];
UIViewController *vc = [mainStoryboard instantiateViewControllerWithIdentifier:@"LoginViewController"];
[ROOTVIEW presentViewController:vc animated:YES completion:nil];

Answer 1

请找到下面的代码。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    UIStoryboard *main = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    UITabBarController *tabController = [main instantiateViewControllerWithIdentifier:@"TabbarController"];
    tabController.delegate = self;
    return YES;
}

-(void) tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController{
    NSLog(@"Selected Index - %lu",(unsigned long)tabBarController.selectedIndex);
}

在ViewController的Button Click方法上，

- (IBAction)btnLoginTapped:(id)sender {
    UIStoryboard *main = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    UITabBarController *tabController = [main instantiateViewControllerWithIdentifier:@"TabbarController"];
    tabController.selectedIndex = 1;
    [self presentViewController:tabController animated:YES completion:nil];
}

然后Main.storyboard，从对象库拖动对象 ，并把它下面急救员在标签栏控制器的场景，设置对象类的AppDelegate，然后右键点击标签栏控制器，并设置委托给该对象类如下图所示的图像。

让我知道它是否有效，我准备为解决方案提供帮助。