调用另一类中的方法 [英] Invoke method in another class

问题描述

我有两个具有各自视图的视图控制器(viewControllerA和viewControllerB).当用户触摸viewControllerA视图中的按钮时，我可以加载viewControllerB的视图.

I have two view controllers (viewControllerA and viewControllerB) with their own views. When the user touches a button in the view of viewControllerA, I am able to load the view of the viewControllerB.

但是，我不知道如何在viewControllerB的类中调用方法！

However, I don't know how to invoke a method in viewControllerB's class!

推荐答案

没有太多要继续的信息，我将假定A和A B是同一类的(尽管不是必须的).您总是可以声明一个属性，然后将其从另一个指向另一个:

Without much info to go on I'll assume that both A & B are of the same class (though they wouldn't have to be). You could always declare a property that would then point from one to the other:

MyViewController.h:

MyViewController.h:

@interface MyViewController : UIViewController {
    MyViewController *altViewController;
}

@property (nonatomic, retain) MyViewController *altViewController
@end

只要确保实例化后，就使用指向另一个VC的指针填充该属性.然后，您可以通过以下方法轻松地在另一个视图控制器上调用方法: [altViewController doMethod];

Just be sure that once instantiated you populate that property with a pointer to the other VC. Then you can easily call a method on the other view controller simply by: [altViewController doMethod];

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