HarmonyOS 关于对象数组内容变更不会引起UI刷新

参考API的链接：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/arkts-observed-and-objectlink-V5

其中this.arrA[Math.floor(this.arrA.length/2)].c，@State无法观察到第二层的变化，但是ClassA被@Observed装饰，ClassA的属性的变化将被@ObjectLink观察到。

@Observed
export class FilterMaterialModel {
  cover: string
  id: string
  describe: string | null
  title: string
  fileAddress: string
  filterLocalPath: string
  downloadProgress: number

  constructor(
    cover: string,
    id: string,
    describe: string | null,
    title: string,
    fileAddress: string
  ) {
    this.cover = cover
    this.id = id
    this.describe = describe
    this.title = title
    this.fileAddress = fileAddress
    this.filterLocalPath = ''
    this.downloadProgress = 0
  }
}

List({ space: CommonConstants.MARGIN_16_PX }) {
  ForEach(this.curMaterialList, (material: FilterMaterialModel, index) => {
    ListItem() {
      FilterItemComponent({ material: material, isSelected: this.curMaterialIndex === index })
        .onClick(() => {
          this.curMaterialIndex = index
          this.lastCurMaterialIndex = index
          this.lastCurGroupIndex = this.curGroupIndex
          this.isSelectedFilter = true
          //如果此滤镜没有下载，则进行下载
          if (!material.filterLocalPath || material.filterLocalPath.length === 0) {
            this.downloadFilter(material, index)
          }
        })
    }
  }, (material: FilterMaterialModel) => material.id)
}
.width(CommonConstants.FULL_SIZE)
.height(CommonConstants.MARGIN_64_PX)
.scrollBar(BarState.Off)
.listDirection(Axis.Horizontal)
.alignListItem(ListItemAlign.Center)

@Component
struct FilterItemComponent {
  @ObjectLink material: FilterMaterialModel
  ...

  build() {
    Column() {
      Stack({ alignContent: Alignment.Center }) {
        Image(this.material.cover)
          .size({ width: CommonConstants.IMAGE_SIZE_44, height: CommonConstants.IMAGE_SIZE_44 })
          .borderRadius(4)

        if (this.material.downloadProgress > 0 && !this.material.filterLocalPath) {
          Progress({
            value: this.material.downloadProgress,
            total: 100,
            type: ProgressType.Ring
          })
            .color($r('app.color.white'))
            .backgroundColor($r('app.color.white_70'))
            .style({
              strokeWidth: 1.5
            })//.size({width: CommonConstants.IMAGE_SIZE_16, height: CommonConstants.IMAGE_SIZE_16})
            .size({ width: CommonConstants.IMAGE_SIZE_32, height: CommonConstants.IMAGE_SIZE_32 })
        } else if (!this.material.filterLocalPath || this.material.filterLocalPath.length === 0) {
          //如果此滤镜未下载
          Image($r('[HohemBaseLib].media.ic_download_16'))
            .size({ width: CommonConstants.IMAGE_SIZE_16, height: CommonConstants.IMAGE_SIZE_16 })
        }

        Text(`${this.material.downloadProgress ?? 0}`)
          .fontSize(CommonConstants.FONT_TIPS_12)
          .fontColor($r('app.color.highlight_deep'))
          .width(CommonConstants.IMAGE_SIZE_44)
          .textAlign(TextAlign.Center)
          .maxLines(1)
          .textOverflow({ overflow: TextOverflow.Ellipsis })
      }
      .size({ width: CommonConstants.IMAGE_SIZE_44, height: CommonConstants.IMAGE_SIZE_44 })
      .borderRadius(4)
      .borderWidth(this.getBorderWidth())
      .borderColor(this.getBorderColor())
      .rotate({ angle: ScreenOrientationUtil.getInstance().getRotateAngle(this.screenRotationStatus) }
    }
  }
}

当变更对象数组数据时无法变更UI。

this.curMaterialList[0].downloadProgress = 100
this.curMaterialList[0].filterLocalPath ='xxxxx'

其中filterLocalPath和downloadProgress是在网络请求中不存在的字段，为了符合需求，新增的为何使用Observe和ObjectLink不能引起UI刷新。