protected void OnClickDrag(Component ct, Action <PointerEventData> cb)
{
ListenerUtil listener = GetOrCreateComponent <ListenerUtil>(ct.gameObject);
listener.onDrag = cb;
}
protected void OnClickUp(GameObject go, Action <PointerEventData> cb)
{
ListenerUtil listener = GetOrCreateComponent <ListenerUtil>(go);
listener.onClickUp = cb;
}
