iOS - 从 ViewController 调用 App Delegate 方法 [英] iOS - Calling App Delegate method from ViewController

问题描述

我想要做的是单击一个按钮(在代码中创建)并让它调用一个不同的视图控制器，然后让它在新的视图控制器中运行一个函数.

What I am trying to do is click a button (that was created in code) and have it call up a different view controller then have it run a function in the new view controller.

我知道它可以在 IB 中相对容易地完成，但这不是一个选项.

I know it could be done relatively easily in IB but that isn't an option.

我想要做的一个例子是，如果你有两个视图控制器，一个带有房子的闪屏.另一个视图控制器可以在上面穿过房子，您可以按照设定的顺序穿过所有房间.启动画面将为每个房间提供按钮，让您可以在步行过程中跳转到任何点.

An example of what I want to do would be if you had two view controllers one with a splash screen of house. The other view controller had a walk through of the house on it that you could go through all the rooms in a set order. The splash screen would have buttons for each room that would allow you to jump to any point on the walk through.

推荐答案

您可以像这样访问委托:

You can access the delegate like this:

MainClass *appDelegate = (MainClass *)[[UIApplication sharedApplication] delegate];

将 MainClass 替换为您的应用程序类的名称.

Replace MainClass with the name of your application class.

然后，如果你有另一个视图控制器的属性，你可以调用类似的东西:

Then, provided you have a property for the other view controller, you can call something like:

[appDelegate.viewController someMethod];

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