如何停止节点而不是让它在 1 秒后再次移动？

Question

我有一辆车是 SKShapeNode。它在移动。当我触摸它时，我想停止它1秒，然后再回到运动。

我有这个代码...但它只是停止，a3 永远不会到达，汽车不会再次启动

let a1 = SKAction.speedTo(0.0, duration: 0.0)
let a2 = SKAction.waitForDuration(0.5)
let a3 = SKAction.speedTo(1.0, duration: 0.0)

Answer 1

下面是一个例子，说明如何将节点从A点移动到B点，并在触摸时停止一秒钟。

class GameScene: SKScene {
    override func didMoveToView(view: SKView) {
        //Create a car
        let car = SKSpriteNode(color: UIColor.purpleColor(), size: CGSize(width: 40, height: 40))
        car.name = "car"
        car.zPosition = 1
        //Start - left edge of the screen
        car.position = CGPoint(x: CGRectGetMinX(frame), y:CGRectGetMidY(frame))
        //End = right edge of the screen
        let endPoint = CGPoint(x: CGRectGetMaxX(frame), y:CGRectGetMidY(frame))
        let move = SKAction.moveTo(endPoint, duration: 10)
        car.runAction(move, withKey: "moving")
        addChild(car)
    }

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

        let touch = touches.first
        if let location = touch?.locationInNode(self){

            //Get the node
            let node = nodeAtPoint(location)
            //Check if it's a car
            if node.name == "car" {

                //See if car is moving
                if node.actionForKey("moving") != nil{

                    //Get the action
                    let movingAction = node.actionForKey("moving")

                    //Pause the action (movement)
                    movingAction?.speed = 0.0

                    let wait = SKAction.waitForDuration(3)
                    let block = SKAction.runBlock({
                        //Unpause the action
                        movingAction?.speed = 1.0
                    })
                    let sequence = SKAction.sequence([wait, block ])
                    node.runAction(sequence, withKey: "waiting")
                }
            }
        }
    }
}

几乎所有的东西都有评论。所以基本上，这里发生的是：

节点移动是通过与 "moving" 键关联的动作完成的
当用户触摸节点时，"moving"键关联的动作暂停；发生这种情况时，将启动另一个名为 "waiting" 的操作 "in parallel"
"waiting" 动作等待一秒钟，并取消暂停 "moving" 动作；因此汽车继续运动

目前，当汽车被触摸时，"moving" 动作暂停...所以如果你再次触摸汽车，它会在原处多停留一秒（新的 "waiting" 动作将覆盖之前的 "waiting" 操作）。如果你不想要这种行为，你可以检查汽车是否已经在等待，像这样：

if node.actionForKey("waiting") == nil {/*handle touch*/}

或者您可以通过检查 "moving" 键关联的动作的速度属性值来检查汽车是否已停止。

如何停止节点而不是让它在 1 秒后再次移动？

How to stop a node and than get it to move again after 1 second?

ios

sprite-kit

skaction

swift