注释

unity 对某一矩形UI进行截取

    /// <summary>/// 截取UI/// </summary>/// <param name="UIRect">UI（中点在最下面）</param>/// <param name="mFileName">路径</param>/// <returns></returns>public IEnumerator CaptureByUI(RectTransform UIRect, string mFileName){//等待帧画面渲染结束yield return new WaitForEndOfFrame();Vector3[] corners = new Vector3[4];UIRect.GetWorldCorners(corners);float a = corners[2].x - corners[0].x;float b = corners[1].y - corners[0].y;Texture2D tex = new Texture2D((int)a, (int)b, TextureFormat.RGB24, false);//从屏幕读取像素, leftBtmX/leftBtnY 是读取的初始位置,width、height是读取像素的宽度和高度tex.ReadPixels(new Rect(corners[0].x, corners[0].y, a, b), 0, 0);Debug.Log(new Rect(corners[0].x, corners[0].y, a, b));//执行读取操作tex.Apply();rawImageIcon.texture = tex;byte[] bytes = tex.EncodeToPNG();//保存File.WriteAllBytes(mFileName, bytes);//DownLoadImg(bytes);}