如何用触摸移动这些物体？

Question

遇到一些麻烦，弄清楚如何用触摸移动这些物体。只需触摸它们并移动它们就是我现在关注的问题。下面我将添加来自GameScene.swift的大部分代码，它应该足以帮助..我想。但是，我确实有另一个名为Tetromino.swift的课程，如果您需要帮助回答我的问题，请告诉我，我会将其添加进来！

我添加了touchesBegan，touchesMoved和touchesEnded，我一直在尝试一些不同的东西，但无法让对象移动 - 所以代码在它们中是不正确的。对象是构成不同Tetromino片段的正方形。提前谢谢！

class GameScene: SKScene {

var activeTetromino1 = Tetromino()
var activeTetromino2 = Tetromino()
var activeTetromino3 = Tetromino()

override func didMove(to view: SKView) {
    // Setup scene
    self.anchorPoint = CGPoint(x: 0, y: 0)

    activeTetromino1 = Tetromino(drawTetrominoAtPoint(location: CGPoint(x: frame.width / 4, y: frame.height / 4)))
    activeTetromino2 = Tetromino(drawTetrominoAtPoint(location: CGPoint(x: frame.width / 2, y: frame.height / 4)))
    activeTetromino3 = Tetromino(drawTetrominoAtPoint(location: CGPoint(x: frame.width / 4 * 3, y: frame.height / 4)))

}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch: AnyObject in (touches) {
        //let location = touch.location(in: self)
        drawTetrominoAtPoint(location: touch.location(in: self))
        /*
        if activeTetromino1.contains(location) {
            activeTetromino1.position = location
        }
        */
    }
}

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch: AnyObject in (touches) {
        drawTetrominoAtPoint(location: touch.location(in: self))

        /*
        let location = touch.location(in: self)
        if activeTetromino1.contains(location) {
            activeTetromino1.position = location
        }
        */
    }
}

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    //activeTetromino1 = Tetromino(position = CGPoint(x: frame.width / 4, y: frame.height / 4))
}


override func update(_ currentTime: CFTimeInterval) {
    // Called before each frame is rendered
}

func drawTetrominoAtPoint(location: CGPoint) {
    let t = Tetromino()
    for row in 0..<t.bitmap.count {
        for col in 0..<t.bitmap[row].count {
            if t.bitmap[row][col] > 0 {
                let block = t.bitmap[row][col]
                let square = SKSpriteNode(color: colors[block], size: CGSize(width: blockSize, height: blockSize))
                square.anchorPoint = CGPoint(x: 1.0, y: 0)
                square.position = CGPoint(x: col * Int(blockSize) + col, y: -row * Int(blockSize) + -row)
                square.position.x += location.x
                square.position.y += location.y
                self.addChild(square)
            }
        }
    }
}
}