节点旋转出角度

Question

我创建了一个圈子：

class 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 = SKPhysicsBody(polygonFromPath: node1bezierPath.CGPath)
        node1.physicsBody?.dynamic = false
        node1.physicsBody?.affectedByGravity = false
        node1.physicsBody?.categoryBitMask = contactBodies.redNode.rawValue
        node1.physicsBody?.contactTestBitMask = ballGroup.redBall.rawValue | ballGroup.blueBall.rawValue | ballGroup.greenBall.rawValue | ballGroup.yellowBall.rawValue
        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 = SKPhysicsBody(polygonFromPath: node2bezierPath.CGPath)
        node2.physicsBody?.dynamic = false
        node2.physicsBody?.affectedByGravity = false
        node2.physicsBody?.categoryBitMask = contactBodies.blueNode.rawValue
        node2.physicsBody?.contactTestBitMask = ballGroup.redBall.rawValue | ballGroup.blueBall.rawValue | ballGroup.greenBall.rawValue | ballGroup.yellowBall.rawValue
        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 = SKPhysicsBody(polygonFromPath: node3bezierPath.CGPath)
        node3.physicsBody?.dynamic = false
        node3.physicsBody?.affectedByGravity = false
        node3.physicsBody?.categoryBitMask = contactBodies.greenNode.rawValue
        node3.physicsBody?.contactTestBitMask = ballGroup.redBall.rawValue | ballGroup.blueBall.rawValue | ballGroup.greenBall.rawValue | ballGroup.yellowBall.rawValue
        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 = SKPhysicsBody(polygonFromPath: node4bezierPath.CGPath)
        node4.physicsBody?.dynamic = false
        node4.physicsBody?.affectedByGravity = false
        node4.physicsBody?.categoryBitMask = contactBodies.yellowNode.rawValue
        node4.physicsBody?.contactTestBitMask = ballGroup.redBall.rawValue | ballGroup.blueBall.rawValue | ballGroup.greenBall.rawValue | ballGroup.yellowBall.rawValue
        self.addChild(node4)

    }

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

        if animated {
            rotateAction = SKAction.rotateByAngle(angle, duration: 0.2)
        }
        else {
            rotateAction = SKAction.rotateByAngle(angle, duration: 0)
        }

        self.runAction(rotateAction)
    }
}

我设置为每次用户点击屏幕时旋转 90 度：

centerCircle.rotate(-3.14/2, 动画: true)

我还声明了一个小球，它会从屏幕顶部掉落并接触到中心圆。游戏逻辑是匹配小球和圆圈的扇形之间的颜色，如果颜色不匹配，则游戏结束。我现在的问题是，无论如何，圆应该是这样的：

但是当我一直点着屏幕旋转圆圈，游戏不断重启时，圆圈会旋转出角度，像这样：

有什么解决办法的建议吗？

Answer 1

首先，我认为您应该使用 CGFloat(M_PI) 而不是 3,14，因为 3,14 不是圆周率的近似值。

其次，当您敲击速度超过 0.2 秒时，是否有可能 SKAction 您运行是运行未完成的旋转导致移位？我也是 SKAction 的新手，所以我不确定它会如何表现，但您可以尝试更慢地点击（在修复 M_PI 之后）并查看它的表现吗？如果问题是由运行在未完成的旋转上进行第二次旋转引起的，您可以禁用第二次点击直到旋转完成，或者您可以将其排队等待在第一次旋转完成后执行。

节点旋转出角度

Node rotation out of angle

ios

sprite-kit

swift