ios - 如何快速更改 SKSpriteNode 的颜色？

Question

我创建了一个带有黑色 SKSpriteNode 的游戏，当用户触摸屏幕时，我希望 SKSpriteNode 变为白色。我用谷歌搜索了一切，并尝试了许多不同的策略，但没有成功。有谁知道如何做到这一点？

这是我的场景代码:

var blackBird = SKSpriteNode()

override func didMoveToView(view: SKView) {
    //Black Bird
    var blackBirdTexture = SKTexture(imageNamed:"blackbird")
    blackBirdTexture.filteringMode = SKTextureFilteringMode.Nearest

    blackBird = SKSpriteNode(texture: blackBirdTexture)
    blackBird.setScale(0.5)
    blackBird.position = CGPoint(x: self.frame.size.width * 0.35, y:
        self.frame.size.height * 0.6)

    blackBird.physicsBody =
        SKPhysicsBody(circleOfRadius:blackBird.size.height/2.0)
    blackBird.physicsBody!.dynamic = true
    blackBird.physicsBody!.allowsRotation = false

    self.addChild(blackBird)
}

override func touchesBegan(touches: Set<NSObject, withEvent event: UIEvent) {
    /* Called when a touch begins */

    for touch: AnyObject in touches {
    let location = touch.locationInNode(self)

    blackBird.color = .whiteColor()
    blackBird.colorBlendFactor = 1.0
}

Answer 1

您可以在SKSpriteNode 上使用color 属性，例如:

sprite.color = .whiteColor()

请记住，如果您的 SKSpriteNode 有纹理，您需要将 colorBlendFactor 设置为非零值才能看到您的颜色。来自SKSpriteNode documentation在 colorBlendFactor 上:

The value must be a number between 0.0 and 1.0, inclusive. The default value (0.0) indicates the color property is ignored and that the texture’s values should be used unmodified. For values greater than 0.0, the texture is blended with the color before being drawn to the scene.

---

如果你想动画化颜色变化，你可以使用 SKAction:

let colorize = SKAction.colorizeWithColor(.whiteColor(), colorBlendFactor: 1, duration: 5)
sprite.runAction(colorize)

来自SKAction documentation在 colorizeWithColor:colorBlendFactor:duration:

上

This action can only be executed by an SKSpriteNode object. When the action executes, the sprite’s color and colorBlendFactor properties are animated to their new values.