更改情節提要后未調用Tabbar委托方法

Question

我在登錄情節提要中沒有登錄和注冊視圖控制器，而在主情節提要中沒有。

一旦注冊成功或登錄成功，然后將Login Storyboard更改為Main。 以下代碼有效，但是當我選擇任何選項卡時，它不會在AppDelegate中調用選項卡委托方法

但是，如果用戶已經成功注冊或登錄，則它將調用以下選項卡委托方法。

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：

沒有調用AppDelegate，但我想知道為什么以下代碼在用戶注銷后無法在AppDelegate中打開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

請找到下面的代碼。

- (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，從對象庫拖動對象 ，並把它下面急救員在標簽欄控制器的場景，設置對象類的AppDelegate，然后右鍵點擊標簽欄控制器，並設置委托給該對象類如下圖所示的圖像。

讓我知道它是否有效，我准備為解決方案提供幫助。