如何在自定义UIButton上获取抽头坐标？

class CustomUIButton: UIButton {
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesBegan(touches, with: event)
        if let touch = touches.first {
            let touchLocation = touch.location(in: self)
            // 获取触摸点的坐标
        }
    }

    override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesMoved(touches, with: event)
        if let touch = touches.first {
            let touchLocation = touch.location(in: self)
            // 获取触摸点的坐标
        }
    }

    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesEnded(touches, with: event)
        if let touch = touches.first {
            let touchLocation = touch.location(in: self)
            // 获取触摸点的坐标
        }
    }
}

let convertedTouchLocation = self.convert(touchLocation, to: self.superview)