File Ionic摄像头文件\u uri转换为blob以便s3上传

我正在开发一个功能，在从本机相机捕获图像后，我正在上传图像。但将文件uri转换为blob时存在问题。它不会继续读取ArrayBuffer。是否有其他将文件uri转换为blob的解决方案

fileUriToBlob(imageData) {
    return new Promise((resolve, reject) => {
      let fileName = "";
      this.file
        .resolveLocalFilesystemUrl(imageData)
        .then(fileEntry => {
          let { name, nativeURL } = fileEntry;

          // get the path..
          let path = nativeURL.substring(0, nativeURL.lastIndexOf("/"));
          console.log("path", path);
          console.log("fileName", name);

          fileName = name;

          // we are provided the name, so now read the file into a buffer
          return this.file.readAsArrayBuffer(path, name);
        })
        .then(buffer => {
          // get the buffer and make a blob to be saved
          let imgBlob = new Blob([buffer], {
            type: "image/jpeg"
          });
          console.log(imgBlob.type, imgBlob.size);

          // pass back blob and the name of the file for saving
          // into fire base
          resolve({
            fileName,
            imgBlob
          });
        })
        .catch(e => reject(e));
    });
  }

资料来源：

编辑：

试过这个

imageToBlob(b64Data: string, contentType: string, sliceSize: number = 512) {
    contentType = contentType || '';
    sliceSize = sliceSize || 512;

    let byteCharacters = atob(b64Data.replace(/^data:image\/(png|jpeg|jpg);base64,/, ''));
    let byteArrays = [];

    for (let offset = 0; offset < byteCharacters.length; offset += sliceSize) {
      let slice = byteCharacters.slice(offset, offset + sliceSize);

      let byteNumbers = new Array(slice.length);
      for (let i = 0; i < slice.length; i++) {
        byteNumbers[i] = slice.charCodeAt(i);
      }

      let byteArray = new Uint8Array(byteNumbers);
      byteArrays.push(byteArray);
    }
    this.blobImage = new Blob(byteArrays, { type: contentType });
    return this.blobImage;
  }

imageToBlob（b64Data:string，contentType:string，sliceSize:number=512）{
contentType=contentType | |“”；
切片大小=切片大小| | 512；
让byteCharacters=atob（b64Data.replace（/^data:image\/（png | jpeg | jpg）；base64，/，''）；
let ByteArray=[]；
for（让offset=0；offset

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但我遇到了这个错误：DomeException:未能在“窗口”上执行“atob”：要解码的字符串编码不正确。

您需要确保已安装cordova插件文件

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请参阅爱奥尼亚文档-

请随意在回购协议中打开一个问题，我会看一看-aaronksaundersi刚刚检查了代码，它确实有效，请发布有关真实问题的其他信息。readAsArrayBuffer似乎无法解决。你遇到过这种情况吗？