关闭发件人视图控制器后执行segue [英] Performing segue after sender view controller is dismissed

问题描述

基本上，我在滑出菜单中有一个按钮(它是它自己的视图控制器，覆盖了Origin屏幕的一部分，我们称它为Menu)，当按下该按钮时，它会与另一个菜单执行模态搜索控制器，例如Destination.

Basically, I have a button in a slide-out menu (which is its own view controller that covers part of the Origin screen, let's call it Menu) that, when pressed, performs a modal segue to another controller, let's say Destination.

是否可以通过按下Menu中的按钮(转到Destination)，将Menu退回到Origin，然后选择Destination?

Is there any way that upon pressing the button in Menu (to go to Destination), that I can dismiss Menu back to Origin, and THEN segue to Destination?

听起来很傻，但这是我以前见过的应用程序所做的事情.在我的情况下，要这样做的原因是，当我在Destination上按完成"时，它将控制器退回到Menu，而当我希望将其退回到Origin时.我不能只是从Destination回到Origin进行搜索.

It sounds silly but it's something that I think I've seen apps do before. In my case, the reason for wanting to do this is that once I press "Done" on Destination, it dismisses that controller back to Menu, when I want it to just dismiss back to Origin. I can't just perform a segue back to Origin from Destination.

代码:

这是我从Origin打开Menu的方式:

let interactor = Interactor()

@IBAction func openMenu(_ sender: AnyObject) {
    performSegue(withIdentifier: "openMenu", sender: nil)
}


@IBAction func edgePanGesture(sender: UIScreenEdgePanGestureRecognizer) {
    let translation = sender.translation(in: view)

    let progress = MenuHelper.calculateProgress(translationInView: translation, viewBounds: view.bounds, direction: .Right)

    MenuHelper.mapGestureStateToInteractor(
        gestureState: sender.state,
        progress: progress,
        interactor: interactor){
            self.performSegue(withIdentifier: "openMenu", sender: nil)
    }
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if let destinationViewController = segue.destination as? MenuViewController {
        destinationViewController.transitioningDelegate = self
        destinationViewController.interactor = interactor
        destinationViewController.currentRoomID = self.currentRoomID
    }
}

这是我目前从Menu到Destination的prepareForSegue，没什么好看的:

This is my prepareForSegue from Menu to Destination currently, nothing fancy:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    super.prepare(for: segue, sender: sender)

    let inviteVC = segue.destination as! InviteVipViewController
    inviteVC.currentRoomID = self.currentRoomID
}

最后解散Destination只是一个简单的

And finally to dismiss Destination is just a simple

@IBAction func cancelButtonPressed(_ sender: Any) {
    self.dismiss(animated: true, completion: nil)
}

我看到了这个问题，基本上是我要尝试的问题，但不幸的是没有答案:

I saw this question which is basically what I'm trying to do but there was no answer unfortunately: Performing segue after dismissing modal swift

抱歉，这听起来令人困惑，但是如果有人知道我在说什么，并且可以让我知道如何设置segues/prepareForSegue使其起作用，那么任何输入都会受到赞赏！

Sorry if this sounds confusing, but if anyone knows what I'm talking about and can let me know how I can set up the segues/prepareForSegues to make it work, any input would be appreciated!

推荐答案

基于对

Based on a modification to this answer, the following should work:

在情节提要中，删除通过单击菜单按钮触发的segue，然后转到Destination.

In your storyboard, remove the segue that is triggered by tapping your menu button and goes to Destination.

创建一个新的序列，该序列从Origin视图控制器到Destination视图控制器.此任务将手动执行.

Create a new segue that goes from the Origin view controller to Destination view controller. This segue is going to be manually performed.

在菜单"中选择目标"选项后，让菜单自行关闭，然后在Origin上执行目标"序列，如下所示:

When your Destination option is selected in Menu, have Menu dismiss itself and then perform the Destination segue on Origin, like this:

    // This code goes in Menu, and you should call it when
    //    the menu button is tapped.
    //
    // presentingViewController is Origin
    weak var pvc = self.presentingViewController

    self.dismiss(animated: true) {

        // Menu has been dismissed, but before it is destroyed
        //  it calls performSegue on Origin
        pvc?.performSegue(withIdentifier: "openDestination", sender: nil)
    }

关闭目的地"后，您应该会看到起源"，而根本不会看到菜单".

When Destination is dismissed, you should see Origin, without seeing Menu at all.

我在一个示例应用程序中对此进行了测试，其中菜单"不是滑出菜单，而是完整的模态视图控制器，并且对我有用.

I tested this in a sample app where "Menu" was not a slide out, but a full modal view controller, and it worked for me.

编辑:在使用@KingTim进行故障排除时，他发现我们需要将Segue从UINavigationController(而不是Origin)连接到Destination.这是因为Origin在导航控制器内部.发现之后，它就起作用了.

While troubleshooting with @KingTim, he found that we needed to wire the segue from the UINavigationController, not Origin, to the Destination. This is because Origin is inside a navigation controller. After that discovery, it worked.

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