Xcode Swift 3 / SpriteKit：点击精灵

Question

我一直在研究，并且肯定尝试了一段时间，以找到一种在您点击精灵时激活功能的方法。例如：如果您点击蓝色精灵，它会激活blue()。点击红色精灵，它会激活red()。我一直在寻找一段时间，所有的答案要么是旧版本的，要么完全不适合我。有人有什么想法吗？

编辑： 这是我正在使用的一些代码。

class GameScene: SKScene {

        var blue = SKSpriteNode()
        var red = SKSpriteNode()
        var green = SKSpriteNode()
        var help = SKLabelNode()
        var score = SKLabelNode()
        var points = 0
        var loseAmount = 1.0
        var firstAdvance = 0
        var loseTimer = Timer()

        override func didMove(to view: SKView) {

            self.physicsWorld.contactDelegate = self

            blue = self.childNode(withName: "blue") as! SKSpriteNode
            blue.position = CGPoint(x: self.frame.width / 2, y: self.frame.height / 2)
            blue.name = "blue"
            blue.isUserInteractionEnabled = true

            red = self.childNode(withName: "red") as! SKSpriteNode
            red.position = CGPoint(x: self.frame.width / 2 + 100, y: self.frame.height / 2)
            red.name = "red"
            red.isUserInteractionEnabled = true

            green = self.childNode(withName: "green") as! SKSpriteNode
            green.position = CGPoint(x: self.frame.width / 2 - 100, y: self.frame.height / 2)
            green.name = "green"
            green.isUserInteractionEnabled = true

            help = self.childNode(withName: "help") as! SKLabelNode
            help.position = CGPoint(x: self.frame.width / 2, y: self.frame.height / 4 * 3)
            help.name = "help"
            help.isUserInteractionEnabled = false

            score = self.childNode(withName: "score") as! SKLabelNode
            score.position = CGPoint(x: self.frame.width / 2, y: self.frame.height - 40)
            score.name = "score"
            score.text = "\(points)"
            score.isUserInteractionEnabled = false

        }

        func randomMove() {
            blue.position = CGPoint(x:Int(arc4random_uniform(244)+38),y:Int(arc4random_uniform(404)+38))
            red.position = CGPoint(x:Int(arc4random_uniform(244)+38),y:Int(arc4random_uniform(404)+38))
            green.position = CGPoint(x:Int(arc4random_uniform(244)+38),y:Int(arc4random_uniform(404)+38))

        }

        func advance() {
            if (firstAdvance == 0) {
                firstAdvance = 1
                help.removeFromParent()
                points += 1
                playPointSound()
                randomMove()
                loseTimer = Timer.scheduledTimer(timeInterval: loseAmount, target: self, selector: #selector(GameScene.lose), userInfo: nil, repeats: true)

            } else if (firstAdvance == 1) {
                points += 1
                loseAmount -= 0.01
                playPointSound()
                self.loseTimer.invalidate()
                loseTimer = Timer.scheduledTimer(timeInterval: loseAmount, target: self, selector: #selector(GameScene.lose), userInfo: nil, repeats: true)

            }

        }

        func lose() {
            playLoseSound()
            let endSceneTemp = EndScene(fileNamed: "EndScene")
            self.scene?.view?.presentScene(endSceneTemp!, transition: SKTransition.crossFade(withDuration: 0.1))
        }

        func playPointSound() {
            let path = Bundle.main.path(forResource: "", ofType:nil)!
            let url = URL(fileURLWithPath: path)

            do {
                let sound = try AVAudioPlayer(contentsOf: url)
                pointSound = sound
                sound.play()
            } catch {
                // couldn't load file :(
            }
        }

        func playLoseSound() {
            let path = Bundle.main.path(forResource: "", ofType:nil)!
            let url = URL(fileURLWithPath: path)

            do {
                let sound = try AVAudioPlayer(contentsOf: url)
                loseSound = sound
                sound.play()
            } catch {
                // couldn't load file
            }
        }

        override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
            for touch in (touches) {
                let positionInScene = touch.location(in: self)
                let touchedNode = self.atPoint(positionInScene)
                if let name = touchedNode.name {
                    if name == "blue" {
                        advance()
                    }
                    if name == "red" || name == "green"{
                        lose()
                    }
                }
            }
        }

        override func update(_ currentTime: TimeInterval) {

        }
    }

Answer 1

您只需要为您的精灵指定一个名称：

let redSpriteNode = SKSpriteNode(imageNamed: "red") // add sprite by code
//let redSpriteNode = self.childNode(withName: "red") as! SKSpriteNode // for adding from .sks file
redSpriteNode.name = "red"
let blueSpriteNode = SKSpriteNode(imageNamed: "blue")
redSpriteNode.name = "blue"

并在touchs开始方法中激活欲望功能。

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        for touch in (touches) {
            let positionInScene = touch.location(in: self)
            let touchedNode = self.atPoint(positionInScene)
            if let name = touchedNode.name {
                if name == "red" {
                   red()
                }
                if name == "blue" {
                   blue()
                }
            }
        }
    }

您可以像这样找到所有具有相同名称的节点：(reference)

self.enumerateChildNodes(withName: "red") {_,_ in
   print(count)
   count = count + 1
}

Answer 2

对我来说最有效的方法是将 UITapGestureRecognizer 添加到 SKView，然后在场景中处理点击手势。

点击后，您可以获得视图中的位置，然后将其转换为场景中的位置。有了它，您可以查找nodeAtPoint: 的点击位置。

当您拥有该节点时，然后检查其名称并在该 SKSpriteNode 上执行操作，如果其名称是您想要在点击时执行某项操作的名称。

虽然您可以通过覆盖 touchesBegan:、touchesMoved: 来做到这一点，但是当您尝试捕捉更复杂的触摸（例如捏合）时，您可以节省一点力气，因为您不需要弄清楚什么是轻触vs. 长按 vs. 先捏。