我已经创建了四个SKSpriteNode，但是我只能拖放一个

Question

https://drive.google.com/file/d/1SA35OP-eGri41LxABmaJlw3196K5NRDX/view?usp=drivesdk

我用For循环创建了四个NSSpriteNodes 但是，它们都与SKSpriteNode具有相同的名称，因此我将它们全部命名为一个循环。 当我根据它们的名称拖放时，它们都是分别拖放的，但是我可以在它们自己的字段中触摸。 如何分别拖放SKSpriteNode

// 1.代码-------------------------------

    let touch:UITouch = touches.first!
    let positionInScene = touch.location(in: self)
    let touchedNode = self.atPoint(positionInScene)



    for touch in touches
    {
        let konum = touch.location(in: self)
        if let name = touchedNode.name
        {
            if name == "a"
            {
            cevapdolukutu.position.x = konum.x
            cevapdolukutu.position.y = konum.y
            }
        }
    }

                 var xPos = CGFloat(Double("115")!)
                let cevapdoluNameArray = ["a","b","c","d","e","f","g","h"]

                for i in 0..<randomharf.count {

                    let cevapdizi = randomharf[i]

                    self.cevapdolukutu = SKSpriteNode(imageNamed: "cevapdolukutu.png")
                    self.cevapdolukutu.position = CGPoint(x: xPos, y: self.size.height /   2.2)
                    self.cevapdolukutu.zPosition = 1
                    self.cevapdolukutu.setScale(0.25)
                    self.cevapdolukutu.anchorPoint = CGPoint(x: 0, y: 0)
                    self.cevapdolukutu.name = cevapdoluNameArray[i]
                    xPos += 130
                    self.addChild(self.cevapdolukutu)

                    self.cevapharf = SKLabelNode(fontNamed: "Avenir")
                    self.cevapharf.text = cevapdizi
                    self.cevapharf.fontSize = 70
                    self.cevapharf.zPosition = 2
                    self.cevapharf.fontColor = UIColor.white
                                   self.cevapharf.verticalAlignmentMode = .center
                                self.cevapharf.horizontalAlignmentMode = .center
                                self.cevapharf.position = CGPoint(x: self.cevapdolukutu.frame.midX, y: self.cevapdolukutu.frame.midY)
                                self.addChild(self.cevapharf)
                            }

// 2.代码-------------------------------------

    for touch in touches
    {
        let konum = touch.location(in: self)

            cevapdolukutu.position.x = konum.x
            cevapdolukutu.position.y = konum.y
    }


                           var xPos = CGFloat(Double("115")!)

                            for i in 0..<randomharf.count {

                                let cevapdizi = randomharf[i]

                                self.cevapdolukutu = SKSpriteNode(imageNamed: "cevapdolukutu.png")
                                self.cevapdolukutu.position = CGPoint(x: xPos, y: self.size.height / 2.2)
                                self.cevapdolukutu.zPosition = 1
                                self.cevapdolukutu.setScale(0.25)
                                self.cevapdolukutu.anchorPoint = CGPoint(x: 0, y: 0)
                                xPos += 130
                                self.addChild(self.cevapdolukutu)

                                self.cevapharf = SKLabelNode(fontNamed: "Avenir")
                                self.cevapharf.text = cevapdizi
                                self.cevapharf.fontSize = 70
                                self.cevapharf.zPosition = 2
                                self.cevapharf.fontColor = UIColor.white
                                self.cevapharf.verticalAlignmentMode = .center
                                self.cevapharf.horizontalAlignmentMode = .center
                                self.cevapharf.position = CGPoint(x: self.cevapdolukutu.frame.midX, y: self.cevapdolukutu.frame.midY)
                                self.addChild(self.cevapharf)
                            }