从第四个视图控制器的第三个转到根视图控制器 swift [英] Go from third of forth view controller to root view controller swift

问题描述

我有 3 个视图控制器，以模态方式呈现，如何关闭视图控制器并直接从第三个右侧返回到第一个(根)视图控制器.

I have 3 view controllers, presented modally, how do I dismiss the view controllers and go directly from the third right back to the first (root) view controller.

基本上，当我从第三个调用 dismissViewControllerAnimated 时，我希望它也关闭底层的第二个视图控制器并直接返回到第一个视图，从内存中释放其他视图.

Basically, when I call dismissViewControllerAnimated from the third I want it to also dismiss the underlying second view controller and return straight to the first view, releasing the others from memory.

编辑

简单地说，想从右侧的第三个视图返回到第一个视图，而不必经过并关闭中间的视图.显然我不能只呈现第一个和第三个，因为那会造成大量内存泄漏.

Simply, want to go from the third view on the right, back to the first without having to go through and dismiss the middle on. Obviously I can't just present the first one form the third, as thats a massive memory leak.

推荐答案

为此使用 NSNotificationCenter.当您想关闭所有视图控制器时，您可以发布通知:

Use NSNotificationCenter for that. You can post a notification when you want to dismiss all of your view controllers:

NSNotificationCenter.defaultCenter().postNotification("dismissNotification")

然后让这些视图控制器注册以在您的 viewWillAppear 函数中监听此类通知:

Then make these view controllers register to listen for such notifications in your viewWillAppear function:

 NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("dismissFunction"), name: "dismissNotificaiton", object: nil)

最后，您在 dismissFunction

self.dismissViewControllerAnimated(true, completion: nil)

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