スプライト接触検出が迅速に機能しない

4色を均等に分割した円を作成しました。各色はノードです。次に、画面の上部から画面の中央に向かって飛んでいるボールである別のノードがあります。ボールが円に接触すると、1ポイントを獲得します。私が今直面している問題は、接触検出が機能していないことです。ここにコードがあります。

また、各色との衝突を検出するために、FourColorSquareの各ノードに個別の物理ボディをセットアップするのが良い方法を知りたいですか？

// move groups outside of class, so that other game scene can use it

let ballGroup:UInt32 = 1 let nodeGroup:UInt32 = 2

クラスFourColorCircle：SKShapeNode {

override init() {
    super.init()
    self.createCircle()
}

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

func createCircle () {
    let center = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame))
    // node1
    let node1bezierPath = UIBezierPath()
    node1bezierPath.addArcWithCenter(center, radius: 100, startAngle: 0.78, endAngle: 2.35, clockwise: true)
    node1bezierPath.addLineToPoint(center)

    let node1 = SKShapeNode(path: node1bezierPath.CGPath)
    node1.strokeColor = SKColor.redColor()
    node1.fillColor = SKColor.redColor()
    node1.physicsBody?.categoryBitMask = nodeGroup
    node1.physicsBody?.collisionBitMask = ballGroup
    node1.physicsBody?.contactTestBitMask = ballGroup
    self.addChild(node1)
    // node2
    let node2bezierPath = UIBezierPath()
    node2bezierPath.addArcWithCenter(center, radius: 100, startAngle: 2.35, endAngle: 3.92, clockwise: true)
    node2bezierPath.addLineToPoint(center)

    let node2 = SKShapeNode(path: node2bezierPath.CGPath)
    node2.strokeColor = SKColor.blueColor()
    node2.fillColor = SKColor.blueColor()
    node2.physicsBody?.categoryBitMask = nodeGroup
    node2.physicsBody?.collisionBitMask = ballGroup
    node2.physicsBody?.contactTestBitMask = ballGroup
    self.addChild(node2)
    // node3
    let node3bezierPath = UIBezierPath()
    node3bezierPath.addArcWithCenter(center, radius: 100, startAngle: 3.92, endAngle: 5.48, clockwise: true)
    node3bezierPath.addLineToPoint(center)

    let node3 = SKShapeNode(path: node3bezierPath.CGPath)
    node3.strokeColor = SKColor.greenColor()
    node3.fillColor = SKColor.greenColor()
    node3.physicsBody?.categoryBitMask = nodeGroup
    node3.physicsBody?.collisionBitMask = ballGroup
    node3.physicsBody?.contactTestBitMask = ballGroup
    self.addChild(node3)
    // node4
    let node4bezierPath = UIBezierPath()
    node4bezierPath.addArcWithCenter(center, radius: 100, startAngle: 5.48, endAngle: 0.78, clockwise: true)
    node4bezierPath.addLineToPoint(center)

    let node4 = SKShapeNode(path: node4bezierPath.CGPath)
    node4.strokeColor = SKColor.yellowColor()
    node4.fillColor = SKColor.yellowColor()
    node4.physicsBody?.categoryBitMask = nodeGroup
    node4.physicsBody?.collisionBitMask = ballGroup
    node4.physicsBody?.contactTestBitMask = ballGroup
    self.addChild(node4)

}

func rotate(angle : CGFloat, animated : Bool) {
    var rotateAction : SKAction!

    if animated {
        rotateAction = SKAction.rotateByAngle(angle, duration: 0.6)
    }
    else {
        rotateAction = SKAction.rotateByAngle(angle, duration: 0)
    }

    self.runAction(rotateAction)
}

}

class GameScene: SKScene, SKPhysicsContactDelegate {

var ball = SKShapeNode(circleOfRadius: 10)
var ballColor = ["red", "blue", "green", "yellow"]
let circle = FourColorCircle()

override func didMoveToView(view: SKView) {

    self.physicsWorld.contactDelegate = self


    ball.physicsBody?.dynamic = true
    ball.physicsBody?.categoryBitMask = ballGroup
    ball.physicsBody?.collisionBitMask = nodeGroup
    ball.physicsBody?.contactTestBitMask = nodeGroup

    circle.physicsBody?.categoryBitMask = nodeGroup
    circle.physicsBody?.collisionBitMask = ballGroup
    circle.physicsBody?.contactTestBitMask = ballGroup


    backgroundColor = SKColor.whiteColor()
    circle.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame))
    self.addChild(circle)

    self.addChild(ball)
    ball.position = CGPointMake(150, 0)
    println("Initial Ball Pos:   \(ball.position)")

}

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

    rotateCenterCircle()

    setBallPosition()

    setRandomColor()

    ballMove()

    // test ball position

    println("--------------")

    println("Ball Pos:   \(ball.position)")

    println("Circle pos: \(circle.position)")

    println("Midpoint:   \(CGPoint(x:CGRectGetMidX(self.frame), y:CGRectGetMidY(self.frame) + self.frame.size.width))")

    println("--------------")

    // super.touchesBegan(touches as Set<NSObject> , withEvent:event)

}



override func update(currentTime: CFTimeInterval) {
    /* Called before each frame is rendered */
}

func rotateCenterCircle() {

    circle.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame))
    circle.rotate(-3.14/2, animated: true)

}

func ballMove() {
    let ballMovement = SKAction.moveTo(CGPoint(x: CGRectGetMidX(self.frame), y: CGRectGetMidY(self.frame)), duration: 3)
    ball.runAction(ballMovement)
}

func setRandomColor() {
    ball.strokeColor = SKColor.whiteColor()
    ball.zPosition = 10


    let ballColorIndex = Int(arc4random_uniform(UInt32(ballColor.count)))
    switch(ballColorIndex) {
    case 0:
        ball.fillColor = SKColor.redColor()
    case 1:
        ball.fillColor = SKColor.blueColor()
    case 2:
        ball.fillColor = SKColor.greenColor()
    case 3:
        ball.fillColor = SKColor.yellowColor()
    default:
        println("Unexpected random index value ", ballColorIndex)
    }
}

func setBallPosition() {

    ball.position = CGPoint(x:CGRectGetMidX(self.frame), y:CGRectGetMidY(self.frame) + (self.frame.size.width / 2))

    println("ball position = \(ball.position)")
}

func didBeginContact(contact: SKPhysicsContact) {

    if contact.bodyA.categoryBitMask == nodeGroup || contact.bodyB.categoryBitMask == nodeGroup {

        println("contact")

    }

}

}

したがって、2つのスプライトが互いに接触しても、コンソールにログは印刷されません。