UGUI 事件穿透使Scrollrect 滚动

public class TouchPenetrate : MonoBehaviour, IPointerClickHandler,IBeginDragHandler,IDragHandler,IPointerDownHandler,IScrollHandler
{
    public GameObject ScrollGo;

    bool beginDrag = false;

    public void OnScroll(PointerEventData eventData)
    {
        PassEvent(eventData, ExecuteEvents.scrollHandler);
    }

    public void OnPointerDown(PointerEventData eventData)
    {
        //PassEvent(eventData, ExecuteEvents.pointerDownHandler);
    }
    public void OnPointerClick(PointerEventData eventData)
    {
        //PassEvent(eventData, ExecuteEvents.pointerClickHandler);
    }

    public void OnBeginDrag(PointerEventData eventData)
    {
        beginDrag = true;
        PassEvent(eventData, ExecuteEvents.beginDragHandler);
    }

    public void OnDrag(PointerEventData eventData)
    {
        PassEvent(eventData, ExecuteEvents.dragHandler);
    }

    //public void OnDragEnd(PointerEventData eventData)
    //{
    //    PassEvent(eventData, ExecuteEvents.endDragHandler);
    //}

    private void Update()
    {
        if (Input.GetMouseButtonUp(0))
        {
            if (beginDrag)
            {
                PointerEventData data = new PointerEventData(EventSystem.current);
                data.button =0;

                PassEvent(data, ExecuteEvents.endDragHandler);
            }
        }

    }

    public void PassEvent<T>(PointerEventData data, ExecuteEvents.EventFunction<T> function)
        where T : IEventSystemHandler
    {

        ExecuteEvents.Execute(ScrollGo, data, function);
    }

}