unity 判断触摸坐标是否落在ui上

1.触摸坐标转ui的GameObject的localPosition

    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;
    }

2.判断newPos的长宽是否超过UI的长宽（以正方形ui示例）

/// 

    /// 判断当前touch pos是否落在Collider范围内
    /// 
    /// 触摸坐标
    /// joy的RectTransform
    /// 
    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;
    }