public void OnBeginDrag(PointerEventData eventData)
{
scrollDirection = Mathf.Abs(eventData.delta.x) > Mathf.Abs(eventData.delta.y) ? ScrollDirection.Horizontal : ScrollDirection.Vertical;
if (null != scrollRectSnap && ScrollDirection.Horizontal == scrollDirection)
{
scrollRectSnap.OnBeginDrag(eventData);
}
}
