从 SceneKit 检测 SpriteKit 按钮按下覆盖

Question

我有一个简单的 HUD，它是使用 sprite kit 构建的，它是我的 3d 场景套件游戏的叠加层。我有一个可见的“主菜单”按钮，但在我的一生中，我无法检测到它被按下了。

下面是叠加层的设置方式。

    sceneView = self.view as! GameSCNView
    scene = SCNScene(named: "art.scnassets/MainScene.scn")
    sceneView.scene = scene
    sceneView.overlaySKScene = OverlayScene(size: sceneView.bounds.size)
    overlayScene = sceneView.overlaySKScene as! OverlayScene
    overlayScene.isUserInteractionEnabled = false

现在这里是正在创建的叠加场景。

class OverlayScene : SKScene {

var timeLabel:SKLabelNode!
var mainMenu:SKSpriteNode!

override init(size: CGSize) {
    super.init(size: size)

    //setup the overlay scene
    self.anchorPoint = CGPoint(x: 0.5, y: 0.5)

    //automatically resize to fill the viewport

    let widthScale = size.width / 1024
    let heightScale = size.height / 768

    self.scaleMode = .resizeFill

    // Initialize the Score
    timeLabel = SKLabelNode(text: "Time: 0")
    timeLabel.position = CGPoint(x: -size.width * 0.35, y: size.height*0.45)
    timeLabel.fontName = "AmericanTypewriter-Bold"
    timeLabel.fontSize = 36 * widthScale
    timeLabel.fontColor = UIColor.white
    addChild(timeLabel)

    mainMenu = SKSpriteNode(imageNamed: "MainMenu_ButtonHighlighted-IpadMini.png")
    mainMenu.anchorPoint = CGPoint(x: 0, y: 0)
    mainMenu.xScale = widthScale
    mainMenu.yScale = heightScale
    mainMenu.position = CGPoint(x: -size.width * 0.35, y: size.height*0.45)
    mainMenu.isUserInteractionEnabled = false
    mainMenu.zPosition = 0
    addChild(mainMenu)
}

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch: AnyObject in touches {

        let location = touch.location(in: self)

        if mainMenu.contains(location) {
            print("Main Menu Touch Began")
        }
    }
}


override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch: AnyObject in touches {

        let location = touch.location(in: self)

        if mainMenu.contains(location) {
            print("Main Menu Touch Ended")
        }
    }
}
}

我的预期输出是看到“主菜单触摸开始”和“主菜单触摸结束”，但我什么也没得到。任何帮助将不胜感激。

Answer 1

1) 通过在您的叠加层上将 isUserInteractionEnabled 设置为 false，您的叠加层将永远不会接收触摸事件。

2) 手动缩放时，您可以打开自己的数学题。 SpriteKit 旨在为您处理缩放，这就是 scaleMode 存在的原因。在最后的过程中扩展一次，然后不断地扩展每一件小事，这更有意义。

进行以下更改，它应该适合您。

设置

overlayScene.isUserInteractionEnabled = true

为了让您的场景能够接收触摸，

然后清理你的代码：

class OverlayScene : SKScene {

    var timeLabel:SKLabelNode!
    var mainMenu:SKSpriteNode!
    override init(size: CGSize) {
        super.init(size:size)
    }
    convenience override init() {

        self.init(size: CGSize(width:1024,height:768))

            //setup the overlay scene
            self.anchorPoint = CGPoint(x: 0.5, y: 0.5)

            //automatically resize to fill the viewport



            self.scaleMode = .fill

            // Initialize the Score
            timeLabel = SKLabelNode(text: "Time: 0")
            timeLabel.position = CGPoint(x: size.width * 0.35, y: size.height*0.45)
            timeLabel.fontName = "AmericanTypewriter-Bold"
            timeLabel.fontSize = 36
            timeLabel.fontColor = UIColor.white
            addChild(timeLabel)

            mainMenu = SKSpriteNode(imageNamed: "MainMenu_ButtonHighlighted-IpadMini.png")
            mainMenu.anchorPoint = CGPoint(x: 0, y: 0)

            mainMenu.position = CGPoint(x: size.width * 0.35, y: size.height*0.45)
            mainMenu.isUserInteractionEnabled = false
            mainMenu.zPosition = 0
            addChild(mainMenu)
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        for touch: AnyObject in touches {

            let location = touch.location(in: self)

            if mainMenu == self.atPoint(location) {
                print("Main Menu Touch Began")
            }
        }
    }


    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        for touch: AnyObject in touches {

            let location = touch.location(in: self)

            if mainMenu == self.atPoint(location) {
                print("Main Menu Touch Ended")
            }
        }
    }
}

并使用：

sceneView.overlaySKScene = OverlayScene()