HarmonyOS 鸿蒙Next中photoViewPicker选择的图片，路径赋值给backgroundImage不展示

HarmonyOS 鸿蒙Next中photoViewPicker选择的图片，路径赋值给backgroundImage不展示页面A通过PersistentStorage把路径存下来，在页面B读取存储的数据赋值给 backgroundImage，同时使用text组件展示路径。

选择图片后进页面B查看，背景图设置正确，text展示正确，但是把应用关掉重新打开后，背景图没了，但是text还展示上次选择的图片路径。

代码如下：

页面A（选择图片）

import { router, window } from '@kit.ArkUI'
import { photoAccessHelper } from '@kit.MediaLibraryKit';
import { BusinessError } from '@kit.BasicServicesKit';

const photoSelectOptions = new photoAccessHelper.PhotoSelectOptions();
photoSelectOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE; // 过滤选择媒体文件类型为IMAGE
photoSelectOptions.maxSelectNumber = 1; // 选择媒体文件的最大数目

@Entry
@Component
struct SetPage {
  @StorageLink('bgImage') bgImageUrl: string = ''
  @State setNameDialog: boolean = false

  @Builder
  ChatHead() {
    Row() {
      Image($r('app.media.arrow_left')).width(16).height(16)
        .onClick(() => {
          router.back()
        })
      Column() {
        Text('设置')
          .textAlign(TextAlign.Center).margin({ left: -16 })
      }
      .layoutWeight(1)
    }
    .width('100%')
    .justifyContent(FlexAlign.SpaceBetween)
    .alignItems(VerticalAlign.Top)
    .backgroundColor('#e5e5e3')
    .padding({
      top: Number(AppStorage.get('topHeight')) + 14,
      bottom: 14,
      left: 10,
      right: 10
    })
    .expandSafeArea()
  }

  build() {
    Stack({ alignContent: Alignment.Top }) {
      Column() {
        this.ChatHead()
        Text('选择聊天背景').width('100%').backgroundColor('#fff').padding({ left: 10, top: 16, bottom: 16 }).fontWeight(600)
          .onClick(() => {
            // 拉起系统图库
            let uris: Array<string> = [];
            const photoViewPicker = new photoAccessHelper.PhotoViewPicker();
            photoViewPicker.select(photoSelectOptions)
              .then((photoSelectResult: photoAccessHelper.PhotoSelectResult) => {
                uris = photoSelectResult.photoUris;
                this.bgImageUrl = uris[0]
                console.info('------选择的图片路径------' + this.bgImageUrl);
              })
              .catch((err: BusinessError) => {
                console.error(`Invoke photoViewPicker.select failed, code is ${err.code}, message is ${err.message}`);
              })
          }
        Divider().vertical(false).height(1).color('#f2f2f2')
        Text('修改名字')
          .width('100%')
          .backgroundColor('#fff')
          .padding({ left: 10, top: 16, bottom: 16 })
          .fontWeight(600)
          .onClick(() => {
            router.pushUrl({
              url: 'pages/SetNamePage'
            })
            // this.dialogY = 0
          })
      }
     }
    .height('100%')
    .backgroundColor('#e5e5e3')
  }
}