HarmonyOS 鸿蒙Next 如何把本地图片直接上传到沙箱

这边使用的场景是什么？一般情况需要通过photoAccessHelper

import fs from '@ohos.file.fs';
import photoAccessHelper from '@ohos.file.photoAccessHelper';

let pathDir = getContext().filesDir;
console.log('保存路径为' + pathDir)
let filePath = pathDir + '/picture.jpg'
fs.createRandomAccessFileSync(filePath, fs.OpenMode.CREATE);
async function picture() {
  let PhotoSelectOptions = new photoAccessHelper.PhotoSelectOptions();
  PhotoSelectOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE;
  PhotoSelectOptions.maxSelectNumber = 1;
  let photoPicker = new photoAccessHelper.PhotoViewPicker();
  photoPicker.select(PhotoSelectOptions).then((PhotoSelectResult: photoAccessHelper.PhotoSelectResult) => {
    let photouri: Array<string> = PhotoSelectResult.photoUris
    let file = fs.openSync(photouri[0], fs.OpenMode.READ_ONLY)
    let file2 = fs.openSync(pathDir+'/picture2.jpg', fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE)
    fs.copyFileSync(file.fd, file2.fd)
    fs.closeSync(file);
    fs.closeSync(file2);
  })
}

@Entry
@Component
export struct Index {
  build() {
    Column() {
      Button('选择并保存').onClick(() => {
        picture()
      })
    }
  }
}