从另一个类调用方法

发布于 2024-12-08 22:39:40 字数 371 浏览 0 评论 0原文

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:  (NSDictionary *)launchOptions
{
  facebook = [[Facebook alloc] initWithAppId:@"xxx" andDelegate:self];
}

我在我的 AppViewDelegate 中声明了 Facebook。我想使用我的 UIViewController 或其他类中的 Facebook 类。我搜索了 sharedApplication 标题，但我没有搜索。

感谢您的回答。

原文

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:  (NSDictionary *)launchOptions
{
  facebook = [[Facebook alloc] initWithAppId:@"xxx" andDelegate:self];
}

I declared Facebook in my AppViewDelegate. I want use this Facebook class from my UIViewController or another class. I searched sharedApplication title but i didn't that.

Thanks for your answer.

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黑凤梨 2024-12-15 22:39:40

可以通过以下方式获得它：

[(AppViewDelegate *)[[UIApplication sharedApplication] delegate] facebook];

我将转换为 AppViewDelegate 假设这是您的 AppDelegate 的名称。然而，这样做的问题是，您通常不想从另一个类引用您的 AppDelegate 来将其用作保存全局变量的类。

在这种情况下我会做的是对 Facebook 类使用 Singleton 模式。检查此链接单例模式

It is possible to get it by doing:

[(AppViewDelegate *)[[UIApplication sharedApplication] delegate] facebook];

I put the cast to AppViewDelegate assuming that is the name of your AppDelegate. However, the problem with this is that you normally don't want to reference your AppDelegate from another class to use it as a class that holds a global variable.

What I would do in this situation is to use a Singleton pattern for Facebook class. Check this link Singleton Pattern

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