同时关闭多个视图控制器

时间:2015-06-22 21:55:25

标签: ios swift viewcontroller dismiss

我正在使用SpriteKit制作游戏。 我有3个viewControllers:选择level vc,game vc和win vc。 游戏结束后,我想显示win vc,然后如果我按下win vc上的OK按钮,我想解雇win vc和游戏vc(从堆栈中弹出两个视图控制器)。但我不知道怎么做,因为如果我打电话

self.dismissViewControllerAnimated(true, completion: {})    

win vc(堆叠顶部)被解雇,所以我不知道在哪里再次调用它来解雇游戏vc。 有没有办法在不使用导航控制器的情况下解决这个问题?

这是第一个VC :(请注意以下以“//”开头的评论)

class SelectLevelViewController: UIViewController { // I implemented a UIButton on its storyboard, and its segue shows GameViewController
    override func viewDidLoad() {
        super.viewDidLoad()
    }
}

这是第二个VC:

class GameViewController: UIViewController, UIPopoverPresentationControllerDelegate {
    var scene: GameScene!
    var stage: Stage!

    var startTime = NSTimeInterval()
    var timer = NSTimer()
    var seconds: Double = 0
    var timeStopped = false

    var score = 0

    @IBOutlet weak var targetLabel: UILabel!
    @IBOutlet var displayTimeLabel: UILabel!
    @IBOutlet weak var scoreLabel: UILabel!
    @IBOutlet weak var gameOverPanel: UIImageView!
    @IBOutlet weak var shuffleButton: UIButton!
    @IBOutlet weak var msNum: UILabel!

    var mapNum = Int()
    var stageNum = Int()

    var tapGestureRecognizer: UITapGestureRecognizer!

    override func viewDidLoad() {
        super.viewDidLoad()

        let skView = view as! SKView
        skView.multipleTouchEnabled = false

        scene = GameScene(size: skView.bounds.size)
        scene.scaleMode = .AspectFill
        msNum.text = "\(mapNum) - \(stageNum)"

        stage = Stage(filename: "Map_0_Stage_1")
        scene.stage = stage
        scene.addTiles()
        scene.swipeHandler = handleSwipe

        gameOverPanel.hidden = true
        shuffleButton.hidden = true

        skView.presentScene(scene)

        Sound.backgroundMusic.play()

        beginGame()
    }

    func beginGame() {
        displayTimeLabel.text = String(format: "%ld", stage.maximumTime)
        score = 0
        updateLabels()

        stage.resetComboMultiplier()

        scene.animateBeginGame() {
            self.shuffleButton.hidden = false
        }

        shuffle()

        startTiming()
    }

    func showWin() {
        gameOverPanel.hidden = false
        scene.userInteractionEnabled = false
        shuffleButton.hidden = true

        scene.animateGameOver() {
            self.tapGestureRecognizer = UITapGestureRecognizer(target: self, action: "hideWin")
            self.view.addGestureRecognizer(self.tapGestureRecognizer)
        }
    }

    func hideWin() {
        view.removeGestureRecognizer(tapGestureRecognizer)
        tapGestureRecognizer = nil

        gameOverPanel.hidden = true
        scene.userInteractionEnabled = true

        self.performSegueWithIdentifier("win", sender: self) // this segue shows WinVC but idk where to dismiss this GameVC after WinVC gets dismissed...
    }

    func shuffle() {...}
    func startTiming() {...}
}

这是第三个VC:

class WinVC: UIViewController {

    @IBOutlet weak var awardResult: UILabel!

    @IBAction func dismissVC(sender: UIButton) {
        self.dismissViewControllerAnimated(true, completion: {}) // dismissing WinVC here when this button is clicked
    }

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

}

9 个答案:

答案 0 :(得分:87)

@Ken Toh的评论是在这种情况下对我有用的 - 在视图控制器中调用您想要在其他所有内容被解除之后显示的消除。

如果您有3个呈现的视图控制器“{堆叠”ABC,其中C位于顶部,则调用A.dismiss(animated: true, completion: nil)将同时解雇B和C.

如果您没有对堆栈根目录的引用,则可以对presentingViewController进行几次访问以获取它。像这样:

self.presentingViewController?.presentingViewController?.dismiss(animated: true, completion: nil)

答案 1 :(得分:27)

您可以在完成块中解除WinVC的呈现控制器(GameViewController):

let presentingViewController = self.presentingViewController
self.dismissViewControllerAnimated(false, completion: {
  presentingViewController?.dismissViewControllerAnimated(true, completion: {})
})

或者,您可以联系到根视图控制器并调用dismissViewControllerAnimated,这将在单个动画中关闭两个模态视图控件:

self.presentingViewController?.presentingViewController?.dismissViewControllerAnimated(true, completion: {})

答案 2 :(得分:7)

您应该可以致电:

self.presentingViewController.dismissViewControllerAnimated(true, completion: {});

(您可能需要在某处添加?! - 我不是一个快速的开发者)

答案 3 :(得分:5)

用于将视图堆栈回滚到某个视图控制器的特殊展开segue 。请在此处查看我的回答:how to dismiss 2 view controller in swift ios?

答案 4 :(得分:2)

在我的应用程序中尝试接受的答案时,我遇到了一些动画问题。先前显示的视图将闪烁或尝试在屏幕上制作动画。这是我的解决方案:

     if let first = presentingViewController,
        let second = first.presentingViewController,
            let third = second.presentingViewController {
                second.view.isHidden = true
                first.view.isHidden = true
                    third.dismiss(animated: true)

     }

答案 5 :(得分:0)

Swift 4.0

 let presentingViewController = self.presentingViewController               
 presentingViewController?.presentingViewController?.presentingViewController?.dismiss(animated: false, completion: nil)

答案 6 :(得分:0)

在致电

时添加到Phlippie Bosman的答案
self.presentingViewController?.presentingViewController?.dismiss(animated: true, completion: nil)

如果您不希望看到presentingViewController,可以执行

self.presentingViewController?.view.addSubview(self.view)

这似乎有点棘手,但是到目前为止,这是我能够使两个视图控制器一致关闭的唯一方法。

答案 7 :(得分:0)

快速5(可能还有4、3等)

presentingViewController?.presentingViewController?不太优雅,在某些情况下不起作用。而是使用segues

假设我们有ViewControllerAViewControllerBViewControllerC。我们在ViewControllerC(我们通过ViewControllerA-> ViewControllerB降落在这里,因此如果执行dismiss,我们将回到ViewControllerB)。我们希望从ViewControllerC直接跳回到ViewControllerA

ViewControllerA中,在ViewController类中添加以下操作:

@IBAction func unwindToViewControllerA(segue: UIStoryboardSegue) {}

是的,此行位于您要返回的ViewController的ViewController中!

现在,您需要从ViewControllerC的故事板(StoryboardC)中创建退出脚本。继续并打开StoryboardC并选择情节提要。按住CTRL键并拖动以退出,如下所示:

enter image description here

系统会为您提供一系列的选择,包括我们刚刚创建的选择:

enter image description here

您现在应该拥有一个segue,单击它:

enter image description here

进入检查器并设置唯一的ID: enter image description here

ViewControllerC上您要撤消并返回到ViewControllerA的位置,执行以下操作(使用我们先前在检查器中设置的ID):

self.performSegue(withIdentifier: "yourIdHere", sender: self)

答案 8 :(得分:0)

尽管Rafeels的答案是可以接受的。并不是每个人都使用Segue的。

对我来说,以下解决方案效果最好

if let viewControllers = self.navigationController?.viewControllers {
   let viewControllerArray = viewControllers.filter { 
       $0 is CustomAViewController || $0 is CustomBViewController  }

    DispatchQueue.main.async {
      self.navigationController?.setViewControllers(viewControllerArray,
                                                    animated: true)
    }
}