HarmonyOS 拍下照片传输到不同页面无法显示

应该是没有权限导致的，参考以下，申请权限。

aboutToAppear(): void {
  let permissions: Array<Permissions> = [
  'ohos.permission.CAMERA',
  'ohos.permission.WRITE_MEDIA',
  'ohos.permission.READ_MEDIA',
  'ohos.permission.MEDIA_LOCATION',
  ];
  let atManager: abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager();
  // requestPermissionsFromUser会判断权限的授权状态来决定是否唤起弹窗
  atManager.requestPermissionsFromUser(this.context, permissions).then((data: PermissionRequestResult) => {
  let grantStatus: Array<number> = data.authResults;
  let length: number = grantStatus.length;
  for (let i = 0; i < length; i++) {
  if (grantStatus[i] != 0) {
  // 用户拒绝授权，提示用户必须授权才能访问当前页面的功能，并引导用户到系统设置中打开相应的权限
  return;
}
}
console.info(`${TAG} Success to request permissions from user. authResults is ${grantStatus}.`);
}).catch((err: BusinessError) => {
  console.error(`${TAG} Failed to request permissions from user. Code is ${err.code}, message is ${err.message}`);
})
}

图片无法显示的问题，可以查看获取的pixelMap是否有值，报错和根据uris获取pixelMap参考以下：

photoSelectOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE; // 过滤选择媒体文件类型为VIDEO
photoSelectOptions.maxSelectNumber = 1; // 选择媒体文件的最大数目
photoSelectOptions.isSearchSupported = true
photoSelectOptions.isEditSupported = true
let uris: Array<string> = [];
const photoViewPicker = new photoAccessHelper.PhotoViewPicker();
photoViewPicker.select(photoSelectOptions).then((photoSelectResult: photoAccessHelper.PhotoSelectResult) => {
  uris = photoSelectResult.photoUris;
  let file = fs.openSync(uris[0], fs.OpenMode.READ_ONLY);
  console.info('file fd:' + file.fd);
  const imageSource: image.ImageSource = image.createImageSource(file.fd);
  let decodingOptions: image.DecodingOptions = {
    editable: true,
    desiredPixelFormat: 3,
  }
  this.pixelMap = await imageSource.createPixelMap(decodingOptions);
}).catch((err: BusinessError) => {
  console.error(`Invoke photoViewPicker.select failed, code is ${err.code}, message is ${err.message}`);
})

按照以上代码，创建photoViewPicker使用：

const photoViewPicker = new photoAccessHelper.PhotoViewPicker();