objective-c - 以编程方式在委托(delegate)中调用 Storyboard

Question

我正在尝试以编程方式调用我的 Storyboard。我的 Storyboard包括以下内容:

[导航 Controller ] -> [MainMenuView] -> [DetailsView]

“MainMenu”标识符被放置在 [MainMenuView] 中

我遇到的问题是屏幕显示空白。我需要做什么？

谢谢。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{       
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];

    MainMenuView *rootViewController = [storyboard instantiateViewControllerWithIdentifier:@"MainMenu"];

    return YES
}

Answer 1

需要先手动创建窗口，然后在其中添加rootViewController(之前的回答几乎是正确的):

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];

    UIViewController *mainViewController = [storyboard instantiateInitialViewController];

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.rootViewController = mainViewController;
    [self.window makeKeyAndVisible];

    return YES;
}