两者中最直接的方法是定期将先前绘制的线转换为SKTexture,并将结果显示为SKSpriteNode的纹理.以下是步骤：

>创建一个用作行容器的SKNode
>创建一个将用作线条画布的SKSpriteNode
>创建一个用于绘制新线条的SKShapeNode
>将容器添加到场景,将画布和形状节点添加到容器
>使用形状节点的path属性绘制一组连接的线段
>当行数达到预定值时,将容器的内容转换为’SKTexture’
>将画布的纹理属性设置为SKTexture.请注意,由于画布也是容器的子项,因此其内容也将添加到纹理中
>泡沫,冲洗,重复步骤5 – 7

这是Swift中的一个示例实现,它在iPhone 6设备上以60 FPS绘制无穷无尽的行(您应该在不使用模拟器的设备上测试性能)：

class GameScene: SKScene {
    // 1. Create container to hold new and old lines
    var lineContainer = SKNode()
    // 2. Create canvas
    var lineCanvas:SKSpriteNode?
    // 3. Create shape to draw new lines
    var lineNode = SKShapeNode()

    var lastDrawTime:Int64 = 0
    var lineCount = 0
    var timeScan:Int64 = 0
    var path = CGPathCreateMutable()

    var lastPoint = CGPointZero

    override func didMoveToView(view:SKView) {
        scaleMode = .ResizeFill

        // 4. Add the container to the scene and the canvas to the container 
        addChild(lineContainer)
        lineCanvas = SKSpriteNode(color:SKColor.clearColor(),size:view.frame.size)
        lineCanvas!.anchorPoint = CGPointZero
        lineCanvas!.position = CGPointZero
        lineContainer.addChild(lineCanvas!)
        lastPoint = CGPointMake(view.frame.size.width/2.0,view.frame.size.height/2.0)
    }

    // Returns a random value in the specified range
    func randomInRange(minValue:CGFloat,maxValue:CGFloat) -> CGFloat {
        let r = CGFloat(Double(arc4random_uniform(UInt32.max))/Double(UInt32.max))
        return (maxValue-minValue) * r + minValue
    }

    func drawLine() {
        if (CGPathIsEmpty(path)) {
            // Create a new line that starts where the prevIoUs line ended
            CGPathMoveToPoint(path,lastPoint.x,lastPoint.y)
            lineNode.path = nil
            lineNode.lineWidth = 1.0
            lineNode.strokeColor = SKColor.blueColor()
            lineNode.zPosition = 100
            lineContainer.addChild(lineNode)
        }
        // Add a random line segment
        let x = randomInRange(size.width*0.1,maxValue: size.width*0.9)
        let y = randomInRange(size.height*0.1,maxValue: size.height*0.9)
        CGPathAddLineToPoint(path,x,y)
        lineNode.path = path
        // Save the current point so we can connect the next line to the end of the last line
        lastPoint = CGPointMake(x,y)
    }

    override func update(currentTime: CFTimeInterval) {
        let lineDrawTime = timeScan / 10
        // 5. Draw a new line every 10 updates. Increment line count
        if (lineDrawTime != lastDrawTime) {
            drawLine()
            ++lineCount
        }
        // 6. and 7. Add all newly and prevIoUsly drawn lines to the canvas
        if (lineCount == 8) {
            addLinesToTexture()
            lineCount = 0
        }
        lastDrawTime = lineDrawTime
        ++timeScan
    }

    func addLinesToTexture () {
        // Convert the contents of the line container to an SKTexture
        let texture = self.view!.textureFromNode(lineContainer)
        // Display the texture
        lineCanvas!.texture = texture
        // Start a new line
        lineNode.removeFromParent()
        path = CGPathCreateMutable()
    }
}