Question

我正在尝试以编程方式调用我的故事板。我的故事板包含以下内容：

[导航控制器] - ＆gt; [MainMenuView] - ＆gt; [的DetailsView]

“MainMenu”标识符放在[MainMenuView]

中

我遇到的问题是屏幕显示为空白。我需要做什么？

感谢。

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

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

    return YES
}

Answer 1

您需要先手动创建窗口，然后在其中添加rootViewController（之前的答案几乎是正确的）：

- (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;
}

Answer 2

您需要设置应用程序窗口的rootViewController属性：

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

    self.window.rootViewController = rootViewController;

    return YES;
}

以编程方式在委托中调用storyboard

2 个答案: