Making SKLabelNode as a crop node of SKShapeNode

问题

Can't find in web, how to make SKLabelNode cropping SKShapeNode. When i colorize the background, my goal is colorize the label too with the same method, so both of them have to colorize simultaneously. But can't imagine how to crop SKShapeNode with this label. Help me please!

回答1:

But can't imagine how to crop SKShapeNode with this label.

If I understand you correctly, you can set SKLabelNode as a mask of a SKCropNode, like this:

override func didMoveToView(view: SKView) {

        backgroundColor = .blackColor()

        let cropNode = SKCropNode()
        cropNode.position = CGPoint(x: frame.midX, y: frame.midY)
        cropNode.zPosition = 1

        let mask = SKLabelNode(fontNamed: "ArialMT")
        mask.text = "MASK"
        mask.fontColor = .greenColor()
        mask.fontSize = 28

        cropNode.maskNode = mask


        let nodeToMask = SKSpriteNode(color: .purpleColor(), size: CGSize(width: 200, height: 200))
        nodeToMask.position = CGPoint(x: 0, y: 0)
        nodeToMask.name = "character"
        cropNode.addChild(nodeToMask)
        //Now colorize the sprite which acts like background
        let colorize = SKAction.sequence([
                SKAction.colorizeWithColor(.orangeColor(), colorBlendFactor: 0, duration: 1),
                SKAction.colorizeWithColor(.purpleColor(), colorBlendFactor: 0, duration: 1)
        ])

        nodeToMask.runAction(SKAction.repeatActionForever(colorize), withKey: "colorizing")

        addChild(cropNode)

}

The result:

来源：https://stackoverflow.com/questions/35986345/making-sklabelnode-as-a-crop-node-of-skshapenode