Unity如何在任意区域截屏创建Sprite

//        // 摘要:        //     Read pixels from screen into the saved texture data.        //        // 参数:        //   source:        //     Rectangular region of the view to read from. Pixels are read from current render        //     target.        //        //   destX:        //     Horizontal pixel position in the texture to place the pixels that are read.        //        //   destY:        //     Vertical pixel position in the texture to place the pixels that are read.        //        //   recalculateMipMaps:        //     Should the texture's mipmaps be recalculated after reading?        public void ReadPixels(Rect source, int destX, int destY, [DefaultValue("true")] bool recalculateMipMaps);        [ExcludeFromDocs]        public void ReadPixels(Rect source, int destX, int destY);

public static IEnumerator CutSpriteFromScreen(this RectTransform boxMin, RectTransform boxMax, UnityAction complete)    {        var sp = new Vector2(boxMin.position.x, boxMin.position.y);        var temp = new Vector2(boxMax.position.x, boxMax.position.y);        Vector2Int size = new Vector2Int((int)(temp.x - sp.x), (int)(temp.y - sp.y));
        //判断截图框是否超出屏幕边界        if (sp.x < 0 || sp.y < 0 || sp.x + size.x > Screen.width || sp.y + size.y > Screen.height)            yield break;
        //等待当前帧渲染结束，此为必须项        yield return new WaitForEndOfFrame();
        Texture2D texture = new Texture2D(size.x, size.y, TextureFormat.RGB24, false);
        texture.ReadPixels(new Rect(sp.x, sp.y, size.x, size.y), 0, 0, false);        texture.Apply();
        complete(Sprite.Create(texture, new Rect(Vector2Int.zero, size), Vector2.one * .5f));    }

StartCoroutine(BoxMin.CutSpriteFromScreen(BoxMax, (x) => GameData.Instance.PlayerData.Bag.FragCutIcon = x));