unity 判断触摸坐标是否落在ui上

Vector3 uiPosGet(Vector3 pos,RectTransform rect)
    {
        Vector2 pos2D;
        RectTransformUtility.ScreenPointToLocalPointInRectangle(rect, pos, can.worldCamera, out pos2D);
        Vector3 newPos = new Vector3(pos2D.x, pos2D.y, 0);
        return newPos;
    }      

/// <summary>
    /// 判断当前touch pos是否落在Collider范围内
    /// </summary>
    /// <param name="pos">触摸坐标</param>
    /// <param name="rect">joy的RectTransform</param>
    /// <returns></returns>
    bool isTouchInCollider(Vector3 pos)
    {
        bool bRet = false;
        RectTransform rect = transform as RectTransform;
        Vector3 newPos = uiPosGet(pos, rect);
        if (newPos.x >= -m_colliderRadius && newPos.x <= m_colliderRadius && newPos.y >= -m_colliderRadius &&
            newPos.y <= m_colliderRadius)
        {
            bRet = true;
        }
        return bRet;
    }