问在UI上拖放

EN

public void OnBeginDrag(PointerEventData eventData)
{
    var canvas = FindInParents<Canvas>(gameObject);

    itemBeingDragged = gameObject;
    m_DraggingPlane = canvas.transform as RectTransform;
}

public void OnDrag(PointerEventData eventData)
{
    SetDraggedPosition(eventData);
}

public void OnEndDrag(PointerEventData eventData)
{
    itemBeingDragged = null;
    int i = 0;
    foreach (Vector3 hex in otherHexes)
    {
        Vector3 rayBeginning = hex + transform.position;
        rays = Physics2D.RaycastAll(rayBeginning, Vector2.zero);


        if (rays.Length > 1)                                                                                //if there are other elements in RayCast
        {
            foreach (RaycastHit2D ray in rays)
            {
                if (ray.transform.gameObject != gameObject && ray.transform.tag == "Hex")                    //if element is not self and is a HexGrid
                {
                    SuccessfulDrag(ray, i);
                }
                else if (ray.transform.gameObject != gameObject && ray.transform.tag == "GetOut")            //if element is not self and is another puzzle
                {
                    FailedDrag();
                    break;
                }
            }
        }
        else if (rays.Length == 1 && rays[0].transform.gameObject == gameObject)                             //if there is only one element and it's self
        {
            FailedDrag();
            break;
        }
        i++;
    }
}