背景：鸿蒙分享作为三方SDK包使用，使用uri分享失败

问题：鸿蒙图片类型分享【图片本地路径的uri类型】，如果不使用base64，转而使用uri分享，uri的标准地址格式是什么？为何我传递uri分享时，跳转微信后提示参数非法？我是通过showAssetsCreationDialog生成uri的。又或者说应该存放于哪个路径所以请老师能够帮忙分析解答（主要代码见下面）

备注：之前技术老师在其他的贴子发的内容我看到了比如这个的：

https://developers.weixin.qq.com/community/minihome/doc/00088adfb140f80d65a3ad11561000

  async savePixelMapWithDialog(

    pixelMap: image.PixelMap,

    fileName?: string,

    quality: number = 90

  ): Promise<string> {

    try {

      const cxt = PlayerViewModel.context;

      if (!cxt) {

        return "";

      }

      const context = cxt;

      const imagePacker = image.createImagePacker();

      const arrayBuffer = await imagePacker.packToData(pixelMap, {

        format: "image/png",

        quality: quality

      });

      const timestamp = Date.now();

      const tempFileName = fileName ? `${fileName}_${timestamp}.png` : `image_${timestamp}.png`;

      const tempFilePath = `${context.cacheDir}/${tempFileName}`;

      const file = await fileIo.open(tempFilePath, fileIo.OpenMode.CREATE | fileIo.OpenMode.READ_WRITE);

      await fileIo.write(file.fd, arrayBuffer);

      fileIo.closeSync(file);

      let mediaUri: string = fileUri.getUriFromPath(tempFilePath)

      let photoCreationConfigs: photoAccessHelper.PhotoCreationConfig[] = [{

        fileNameExtension: 'png',

        photoType: photoAccessHelper.PhotoType.IMAGE

      }];

      const phAccessHelper = photoAccessHelper.getPhotoAccessHelper(context);

      let desFileUris: string[] = await phAccessHelper.showAssetsCreationDialog([mediaUri], photoCreationConfigs);

      if (desFileUris.length === 0) {

        await fileIo.unlink(tempFilePath);

        return "";

      }

      let desFile = await fileIo.open(desFileUris[0], fileIo.OpenMode.WRITE_ONLY);

      let srcFile = await fileIo.open(tempFilePath, fileIo.OpenMode.READ_ONLY);

      await fileIo.copyFile(srcFile.fd, desFile.fd);

      fileIo.closeSync(srcFile);

      fileIo.closeSync(desFile);

      await fileIo.unlink(tempFilePath);

      promptAction.showToast({ message: '图片保存成功' });

      return desFileUris[0];

    } catch (err) {

      promptAction.showToast({ message: '保存失败，请重试' });

      return "";

    }

  }

  private async shareImage() {

    if (!this.imageUrl) {

      return;

    }

    if (!PlayerViewModel.context) {

      return;

    }

    let imageObject = new wxopensdk.WXImageObject

    imageObject.uri = this.imageUrl;

    let mediaMessage = new wxopensdk.WXMediaMessage()

    mediaMessage.mediaObject = imageObject

    let req = new wxopensdk.SendMessageToWXReq()

    req.scene = wxopensdk.SendMessageToWXReq.WXSceneSession

    req.message = mediaMessage;

    WXApi.sendReq(PlayerViewModel.context as common.UIAbilityContext, req);

  }