节点/ Swift 3.0的变化速度

Question

我试图改变我的节点的速度。现在，我的节点只要在你触摸的任何地方移动--这是测试的基础。我只是希望我的第一个节点(bubble1 -引用代码)移动得更快一些，这样我就可以再次改变速度，等等。谢谢你的帮助。

*现在我只想改变"bubble1“的速度，没有别的了。我看过其他关于如何做到这一点的帖子，但没有一篇是非常最新的。所以我贴了我自己的。=)

import SpriteKit
import GameplayKit

class GameScene: SKScene {

//var simpleS = SKSpriteNode()
var ball = SKSpriteNode(imageNamed: "Ball")
var bubble = SKSpriteNode(imageNamed: "square")
var bubble1 = SKSpriteNode(imageNamed: "square")
var bubble2 = SKSpriteNode(imageNamed: "square")
var bubble3 = SKSpriteNode(imageNamed: "square")
var bubble4 = SKSpriteNode(imageNamed: "square")


override func didMove(to view: SKView) {

    //simpleS = self.childNode(withName: "simpleS") as! SKSpriteNode

    //simpleS.physicsBody?.affectedByGravity = true
    //simpleS.setScale(3.0)

    ball.position = CGPoint(x: self.frame.midX, y: self.frame.midY)
    ball.setScale(0.1)
    //self.addChild(ball)

    bubble.position = CGPoint(x: self.frame.midX, y: self.frame.midY)
    bubble.setScale(0.3)
    self.addChild(bubble)

    bubble1.position = CGPoint(x: self.frame.midX, y: self.frame.midY)
    bubble1.setScale(0.3)
    self.addChild(bubble1)

    bubble2.position = CGPoint(x: self.frame.midX, y: self.frame.midY)
    bubble2.setScale(0.3)
    self.addChild(bubble2)

    bubble3.position = CGPoint(x: self.frame.midX, y: self.frame.midY)
    bubble3.setScale(0.3)
    self.addChild(bubble3)

    bubble4.position = CGPoint(x: self.frame.midX, y: self.frame.midY)
    bubble4.setScale(0.3)
    self.addChild(bubble4)     
}


override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {        
    for touch in touches {
        let location = touch.location(in: self)

        //simpleS.run(SKAction.moveTo(x: location.x, duration: 0.5))
        //simpleS.run(SKAction.moveTo(y: location.y, duration: 0.5))

        ball.run(SKAction.moveTo(x: location.x, duration: 0.0))
        ball.run(SKAction.moveTo(y: location.y, duration: 0.0))

        bubble.run(SKAction.moveTo(x: location.x, duration: 0.3))
        bubble.run(SKAction.moveTo(y: location.y, duration: 0.3))

        bubble1.run(SKAction.moveTo(x: location.x, duration: 0.4))
        bubble1.run(SKAction.moveTo(y: location.y, duration: 0.4))

        bubble2.run(SKAction.moveTo(x: location.x, duration: 0.5))
        bubble2.run(SKAction.moveTo(y: location.y, duration: 0.5))

        bubble3.run(SKAction.moveTo(x: location.x, duration: 0.6))
        bubble3.run(SKAction.moveTo(y: location.y, duration: 0.6))

        bubble4.run(SKAction.moveTo(x: location.x, duration: 0.8))
        bubble4.run(SKAction.moveTo(y: location.y, duration: 0.8))
    }
}

Answer 1

有几种方法你可以做到这一点。

1. 改变持续时间，因为这会加快速度，但我不认为这是你想要的。我想你想知道如何加快SKAction的速度.
2. 通过速度属性更改SKAction的执行率

速度属性被记录为这里。

您需要做几件事才能使这个值对bubble1来说是可访问的和唯一可寻址的

1. 使SKAction on bubble1成为唯一，这样您就可以控制它。有两种方法可以做到这一点：

- give it a unique name in its '.name' property, look up and find that 
- have a reference to bubble1 and address its SKAction (a

​

1. 通过更改SKAction属性告诉影响bubble1的.speed运行得更快

或者..。您可以懒惰，只需在任何给定节点上调整所有操作的速度值，如下所示：https://developer.apple.com/reference/spritekit/sknode/1483036-speed