将"initWithNibName“改为"storyboardWithName”

Question

我按照一些教程在应用程序启动期间创建了一个打开的门动画，但它调用了一个

xib文件和我想调用故事板，但我没有足够的经验。这是我的代码

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.
    self.viewController = [[[OpenDoorsViewController alloc] initWithNibName:@"OpenDoorsViewController" bundle:nil] autorelease];
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    return YES;
}

Answer 1

如果您只是想在应用程序启动时加载故事板的初始视图控制器，只需在application:didFinishLaunchingWithOptions:中返回YES即可。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    return YES;
}

如果您想要从storyboard加载特定的控制器，您需要首先通过以下方式获取storybard实例

UIStoryboard * storyboard = [UIStoryboard storyboardWithName:@"StoryboardName" bundle:nil];

然后使用它来实例化所需的控制器

UIViewController * controller = [storyboard instantiateViewControllerWithIdentifier:@"controllerIdentifier"];

其中controllerIdentifier已被指定为界面生成器中控制器的情节提要标识符。

下面是一个加载特定视图控制器的示例，在启动时呈现它。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    UIStoryboard * storyboard = [UIStoryboard storyboardWithName:@"StoryboardName" bundle:nil];
    UIViewController * controller = [storyboard instantiateViewControllerWithIdentifier:@"controllerIdentifier"];
    self.window.rootViewController = controller;
    return YES;
}

Answer 2

如果你开始一个新的iOS项目并选择“使用故事板”，故事板将自动为你预加载。

Storyboard是一个包含应用程序的所有控制器(场景)的地方，要引用一个控制器(场景)，您需要使用

    UIViewController *controller = [[UIStoryboard storyboardWithName:@"storyboard" bundle:[NSBundle mainBundle]] instantiateViewControllerWithIdentifier:@"an identifier"];