ios - 如何加快物体的运动？

Question

在场景中你可以用手指移动物体。但是，如果您只是加快手指在屏幕上的移动速度 - 对象就会保持原位。有没有可能加快它的移动速度？持续时间已设置为 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

你的问题不是速度，你的问题是你在屏幕上移动得太快了，你的触摸不再识别它下面的节点，因为该节点实际上不在它下面。你如何处理这个问题是在触摸开始事件上，你检查一个节点，并将这个节点分配给一个变量。然后在触摸移动事件上，更新新变量。最后在触摸结束时，清除变量。请注意，您需要为诸如多点触控之类的事情处理此代码

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)

}