节点和按钮缩放 - 触摸开始、触摸移动、触摸结束

Question

就像我在应用商店中找到的许多其他应用一样，当您触摸一个按钮时，它会以某种方式缩放，无论它变大还是变小。我想使用SpriteKit 节点和SKAction 来实现这一点； scaleTo。这是我到目前为止所得到的。

import SpriteKit

class GameEndedScene: SKScene {

let scaleIn = SKAction.scaleTo(1.5, duration: 0.2)
let scaleOut = SKAction.scaleTo(1.0, duration: 0.2)

override func didMoveToView(view: SKView) {
    /* Setup your scene here */
    var playButton = SKSpriteNode()
    var shareButton = SKSpriteNode()

    playButton.size = CGSizeMake(100, 100)
    shareButton.size = CGSizeMake(100, 100)

    playButton.position = CGPointMake(self.frame.midX, self.frame.midY + 100)
    shareButton.position = CGPointMake(self.frame.midX, self.frame.midY - 100)

    playButton.color = UIColor.whiteColor()
    shareButton.color = UIColor.whiteColor()

    playButton.name = "Scale"
    shareButton.name = "Scale"

    addChild(playButton)
    addChild(shareButton)
}

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    for touch: AnyObject in touches {
        let location = touch.locationInNode(self)
        let node: SKNode = nodeAtPoint(location)

        if node.name == "Scale" {
            node.runAction(scaleIn)
        }
    }
}

override func touchesMoved(touches: NSSet, withEvent event: UIEvent) {

}

override func touchesEnded(touches: NSSet, withEvent event: UIEvent) {
    for touch: AnyObject in touches {
        let location = touch.locationInNode(self)
        let node: SKNode = nodeAtPoint(location)

        if node.name == "Scale" {
            node.runAction(scaleOut)
        }
    }
}

缩放在touchesBegan 和touchesEnded 中工作得非常好，但我希望用户能够移动触摸，并且如果它开始触摸一个新节点，该节点也以“Scale”为名，我想要它具有与 Touches Began 相同的效果，如果触摸远离节点，我希望它具有与 touchesEnded 相同的效果。感谢您的帮助，抱歉之前是凌晨 3:00，所以没有详细说明。

Answer 1

我想出了如何使用单独的Boolean 值来表示节点当前是否被缩放。用户现在可以触摸和按住；如果他们将手指从节点上移开，它将scaleTo 正常（1.0），如果他们将手指移到节点上，它将scaleTo1.5。我的代码运行良好，但我不确定是否有更完善的方法可以做到这一点。这是我的代码（这个有效），但如果有人有更精致和更有效的方法来实现这一点，请发布您的答案。谢谢你

import SpriteKit

class GameEndedScene: SKScene {

var playButton = SKSpriteNode()
var shareButton = SKSpriteNode()
let scaleIn = SKAction.scaleTo(1.5, duration: 0.2)
let scaleOut = SKAction.scaleTo(1.0, duration: 0.2)
var playScale: Bool = Bool()
var shareScale: Bool = Bool()

override func didMoveToView(view: SKView) {
    /* Setup your scene here */

    playButton.size = CGSizeMake(100, 100)
    shareButton.size = CGSizeMake(100, 100)

    playButton.position = CGPointMake(self.frame.midX, self.frame.midY + 100)
    shareButton.position = CGPointMake(self.frame.midX, self.frame.midY - 100)

    playButton.color = UIColor.whiteColor()
    shareButton.color = UIColor.whiteColor()

    addChild(playButton)
    addChild(shareButton)
}

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    for touch: AnyObject in touches {
        let location = touch.locationInNode(self)
        let node: SKNode = nodeAtPoint(location)

        if node == playButton {
            playScale = true
            playButton.runAction(scaleIn)
        }
        else if node == shareButton {
            shareScale = true
            shareButton.runAction(scaleIn)
        }
    }
}

override func touchesMoved(touches: NSSet, withEvent event: UIEvent) {
    for touch: AnyObject in touches {
        let location = touch.locationInNode(self)
        let node: SKNode = nodeAtPoint(location)

        if node != playButton && (playScale) {
            playScale = false
            playButton.runAction(scaleOut)
        }
        else if node != shareButton && (shareScale) {
            shareScale = false
            shareButton.runAction(scaleOut)
        }
        else if node == playButton && (!playScale) {
            playScale = true
            playButton.runAction(scaleIn)
        }
        else if node == shareButton && (!shareScale) {
            shareScale = true
            shareButton.runAction(scaleIn)
        }
    }
}

override func touchesEnded(touches: NSSet, withEvent event: UIEvent) {
    for touch: AnyObject in touches {
        let location = touch.locationInNode(self)
        let node: SKNode = nodeAtPoint(location)

        if node == playButton {
            playScale = false
            playButton.runAction(scaleOut)
        }
        else if node == shareButton {
            shareScale = false
            shareButton.runAction(scaleOut)
        }
        else if node != playButton && (playScale) {
            playScale = false
            playButton.runAction(scaleOut)
        }
        else if node != shareButton && (shareScale) {
            shareScale = false
            shareButton.runAction(scaleOut)
        }
    }
}