由于运行应用程序时未捕获的异常而终止应用程序

Question

我正在制作一个游戏，如果我按下按钮，玩家 (circuloPrincipal) 会将颜色更改为按钮确定的颜色。 当我运行我的游戏时，有时会因以下错误而崩溃。我没有找到错误，因为我不知道如何解释

由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“尝试添加已具有父级的 SKNode：名称：'button4' 纹理：['circuloBoton' (100 x 100)] 位置：{407, 39 } 比例：{1.00, 1.00} 大小：{60, 60} 锚点：{0.5, 0.5} 旋转：0.00'

    circuloPrincipal.size = CGSize(width: 225, height: 225)
    circuloPrincipal.position = CGPoint(x: frame.width / 2, y: frame.height / 2)
    circuloPrincipal.color = colorAzul
    circuloPrincipal.colorBlendFactor = 1.0
    circuloPrincipal.physicsBody = SKPhysicsBody(circleOfRadius: circuloPrincipal.size.height / 2)
    circuloPrincipal.physicsBody?.contactTestBitMask = physicsCategory.circuloPrincipal
    circuloPrincipal.physicsBody?.collisionBitMask = physicsCategory.enemigo
    circuloPrincipal.physicsBody?.contactTestBitMask = physicsCategory.enemigo
    circuloPrincipal.physicsBody?.affectedByGravity = false
    circuloPrincipal.physicsBody?.dynamic = false
    circuloPrincipal.name = "circuloPrincipal"
    circuloPrincipal.zPosition = 5.0
    circuloBlanco.size = CGSize(width: 60, height: 60)
    circuloBlanco.position = CGPoint(x: frame.width / 2 - 105 ,  y: frame.height / 2 - 345)
    circuloBlanco.color = colorBlanco
    circuloBlanco.colorBlendFactor = 1.0
    circuloBlanco.zPosition = 4.0

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {

    /* Called when a touch begins */

    if gameStarted == false {

        circuloVerde.removeFromParent()
        circuloMorado.removeFromParent()
        circuloRojo.removeFromParent()
        circuloBlanco.removeFromParent()


        circuloPrincipal.color = colorAzul

        enemigoTimer = NSTimer.scheduledTimerWithTimeInterval(0.7, target: self, selector: Selector("enemigos"), userInfo: nil, repeats: true)

        gameStarted = true
        circuloPrincipal.runAction(SKAction.scaleTo(0.44, duration: 0.4))
        score = 0
        scoreLabel.text = "\(score)"
        hits = 0
        highscoreLabel.runAction(SKAction.fadeOutWithDuration(0.5))    
    }

    circuloVerde.name = "button"

    let touch = touches.first
    let positionInScene = touch!.locationInNode(self)
    let touchedNode = self.nodeAtPoint(positionInScene)

    if let name = touchedNode.name {
        if name == "button" {     
            circuloPrincipal.color = colorVerde
        }  
    }

    circuloAmarillo.name = "button2"

    let touch2 = touches.first
    let positionInScene2 = touch2!.locationInNode(self)
    let touchedNode2 = self.nodeAtPoint(positionInScene2)

    if let name = touchedNode2.name {
        if name == "button2" { 
            circuloPrincipal.color = colorAmarillo    
        }
    }

    circuloAzul.name = "button3"

    let touch3 = touches.first
    let positionInScene3 = touch3!.locationInNode(self)
    let touchedNode3 = self.nodeAtPoint(positionInScene3)

    if let name = touchedNode3.name {
        if name == "button3" {
            //do my stuff
            circuloPrincipal.color = colorAzul  
        }
    }

    circuloBlanco.name = "button4"

    let touch4 = touches.first
    let positionInScene4 = touch4!.locationInNode(self)
    let touchedNode4 = self.nodeAtPoint(positionInScene4)

    if let name = touchedNode4.name {
        if name == "button4" {
            circuloPrincipal.color = colorBlanco
        }
    }

    circuloRojo.name = "button5"

    let touch5 = touches.first
    let positionInScene5 = touch5!.locationInNode(self)
    let touchedNode5 = self.nodeAtPoint(positionInScene5)

    if let name = touchedNode5.name {   
        if name == "button5" {
            circuloPrincipal.color = colorRojo  
        }
    }

    circuloMorado.name = "button6"

    let touch6 = touches.first
    let positionInScene6 = touch6!.locationInNode(self)

    let touchedNode6 = self.nodeAtPoint(positionInScene6)

    if let name = touchedNode6.name {
        if name == "button6" {
            circuloPrincipal.color = colorMorado 
        }
    }
}

Answer 1

您正在尝试添加一个节点，但它已经有一个父节点。它就在错误消息中。

你可以检查它是否已经有这样的父母

let childNode = SKNode()
let parentNode = SKNode()

if childNode.parent == nil {
    parentNode.addChild(childNode)
}