HarmonyOS 刷新Swiper里的数据时，index下标还是上一次的值

@Entry  
@Component  
struct Index {  
  @State viewPagerData: Array<testBean> = new Array  
  @State viewPagerData2: Array<testBean> = new Array  
  @State update: boolean = false  
  @State index: number = 0  
  aboutToAppear(): void {  
    for (let i = 0; i < 3; i++) {  
      let item = new testBean()  
      item.id = i  
      item.name = 'viewPagerData：' + i  
      this.viewPagerData.push(item)  
    }  
    for (let i = 0; i < 3; i++) {  
      let item = new testBean()  
      item.id = i  
      item.name = 'viewPagerData2：' + i  
      this.viewPagerData2.push(item)  
    }  
  }  
  build() {  
    Column() {  
      Button(this.update? 'viewPagerData2' : 'viewPagerData')  
        .onClick(() => {  
          this.update = !this.update  
          this.index = 0  
        })  
      Swiper() {  
        ForEach(this.update ? this.viewPagerData2 : this.viewPagerData, (item: testBean, index) => {  
          Text(item.name)  
            .width('100%')  
            .height('100%')  
            .backgroundColor(Color.Pink)  
        }, (item: testBean, index: number) => `${JSON.stringify(item)}_${index}`)  
      }  
      .index(this.index)  
      .cachedCount(0)  
      .loop(false)  
      .vertical(true)  
      .itemSpace(10)  
      .onChange((index) => {  
        this.index = index  
      })  
    }  
  }  
}  
export class testBean {  
  id?: number  
  name?: string  
}