在滚动条视图中未检测到触摸位置

Question

我正在尝试将图像从滚动条视图移动到屏幕上的其他点。当我在滚动视图外部（名为optionScroller）触摸时，它可以工作，但在滚动条视图中没有检测到任何内容。：

override func touchesEnded(touches: Set<UITouch>, withEvent: UIEvent?) {
    self.movingImageView.image = nil


    }

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    for touch in (touches ){

        location = touch.locationInView(view)

        movingImageView.center = location

    }}

override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
    for touch in (touches ){

        location = touch.locationInView(self.view)

        movingImageView.center = location

}}