Question

我正在尝试将多个图像上传到Firebase，看来确实可行。

代码的工作方式是通过遍历一系列本地图像路径。然后将每个图像上传到Firebase并提供URL。然后，我将这些URL存储到一个数组中，并用它替换原来的内容（本地图像路径）。

但是问题出在哪里，我发现这有时可行，有时我得到undefined作为图像src="..."。即：

<b>Hello World</b><img src=\"https://firebasestorage.googleapis.com/xxxx>Another image <img src=\"undefined">`

我还要指出，所有图像的确上传到Firebase存储中。因此，不确定导致以下问题的以下代码有什么问题。任何帮助表示赞赏。谢谢。

///// MULTI IMAGE UPLOAD WITH TEXT
export const postStorymulti = (desc, imageArray) => {
  return (dispatch) => {
    dispatch({
      type: POST_STORY
    });

    this.multiuploadImage(imageArray).then(url =>
      this.changedesc(desc, imageArray).then(uploadDescription =>
        firebase.database().ref('blogs/' + currentUser.uid).push({
          blogDescription: uploadDescription,
        })
      ).catch(error => postStoryFail(dispatch, error))
    ).catch(error => postStoryFail(dispatch, error));
  };
};

在这里，我将每个本地图像上传到Firebase，并将这些URL存储到名为imageArray的新数组中：

multiuploadImage = (imageArray) => {
  return new Promise((resolve, reject) => {
    for (var i = 0; i < imageArray.length; i++) {
      let ii = i;
      const uploadUri = imageArray[i];
      let uploadBlob = null;
      let mime = 'image/jpg';
      const imageRef = firebase.storage().ref('uploads').child(uiqueID());

      fs.readFile(uploadUri, 'base64')
        .then((data) => {
          return Blob.build(data, {
            type: `${mime};BASE64`
          });
        })
        .then((blob) => {
          uploadBlob = blob
          return imageRef.put(blob, {
            contentType: mime
          });
        })
        .then(() => {
          uploadBlob.close();
          return imageRef.getDownloadURL();
        })
        .then((url) => {
          resolve(url)
          //URLS stored here
          newimageArray[ii] = url;
        })
        .catch((error) => {
          reject(error)
        });
    }
  });
}

在这里，我将原来的img src="..."替换为Firebase URL：

changedesc = (desc, imageArray) => {
  return new Promise((resolve, reject) => {
    var uploadDescription;
    var rgx = /<img src="([^">]+)"/g;
    var match;
    for (var ya = 0; ya < imageArray.length; ya++) {
      match = rgx.exec(nn);
      uploadDescription = desc.replace(match[1], newimageArray[ya]);
    }
    resolve(uploadDescription)
      .catch((error) => {
        reject(error)
      });
  });
}

React Native img src未定义

0 个答案: