UIViewController的双向关系(Two way relation for UIViewController)

UIViewController的双向关系(Two way relation for UIViewController)

我有一个容器视图控制器说ContainerViewController和另一个UIViewController（PhotoViewcController）我将其添加为ContainerViewController中的childviewcontroller。 这条消息从ContainerViewController转发到PhotoViewcController。 但是，如何在父子视图控制器中使用双向关系？ 以便将消息从PhotoViewcController传递到ContainerViewController。

I have a container view controller say ContainerViewController and another UIViewController(PhotoViewcController) which i am adding as a childviewcontroller in ContainerViewController. So that message is forwarded from ContainerViewController to PhotoViewcController. But how can i use the two way relation in the parent child view controllers? so that message is passed form PhotoViewcController to ContainerViewController.

最满意答案

像这样在子类中创建一个属性

@property (assign) id pDelegate;

并合成它，当你转到子视图控制器时，在push / present之前将委托设置为self

childController.pDelegate = self;

现在，当您要发送消息时，请执行此操作

if([self.pDelegate respndsToSelector:@selector(popedBackFromChild:)]) { [self.pDelegate popedBackFromChild:<some object>]; }

告诉我你是否需要进一步解释

make a property in child class like this

@property (assign) id pDelegate;

and synthesize it, and when you go to child view controller, set the delegate as self before push/present as

childController.pDelegate = self;

now when you want to send the message, do this

if([self.pDelegate respndsToSelector:@selector(popedBackFromChild:)]) { [self.pDelegate popedBackFromChild:<some object>]; }

tell me if you need further explanation