如何加快物體的運動？

Question

在手指的場景中，您可以移動對象。 但是，如果只是加快手指在屏幕上的移動，則該對象將保持在原位。 是否可以加快其運動速度？ 持續時間已設置為0

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

    let touch = touches.first
    let touchLocation = touch!.locationInNode(self)
    let node = self.nodeAtPoint(touchLocation)

    if (node.name == "circle") {

        let moveAction = SKAction.moveTo(touchLocation, duration: 0)

        figureUser.runAction(moveAction)
    }
}

Answer 1

問題不在於速度，而是問題在於您在屏幕上的移動速度如此之快，觸摸不再能夠識別其下方的節點，因為該節點實際上不在其下方。 處理該問題的方法是在touch begin事件上，檢查一個節點，然后將此節點分配給變量。 然后在觸摸移動事件中，更新新變量。 最后在觸摸端，清除變量。 請注意，您需要處理此類代碼以實現多點觸控

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

    let touch = touches.first
    let touchLocation = touch!.locationInNode(self)
    let node = self.nodeAtPoint(touchLocation)

    if (node.name == "circle") {
        movingNode = node
        let moveAction = SKAction.moveTo(touchLocation, duration: 0)

        figureUser.runAction(moveAction)
    }
}
override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?)     {

    let touch = touches.first
    let touchLocation = touch!.locationInNode(self)

        let moveAction = SKAction.moveTo(touchLocation, duration: 0)
     //at this point I am lost,  how does node even relate here,  
     //is figureUser suppose to be node?
        figureUser.runAction(moveAction)

}