HarmonyOS鸿蒙Next中Swiper懒加载时Radio组件的选中问题

你好，可以参考以下代码：

```typescript
class MyDataSource implements IDataSource {
  private list: number[] = []

  constructor(list: number[]) {
    this.list = list
  }

  totalCount(): number {
    return this.list.length
  }

  getData(index: number): number {
    return this.list[index]
  }

  registerDataChangeListener(listener: DataChangeListener): void {
  }

  unregisterDataChangeListener() {
  }
}

[@Entry](/user/Entry)
[@Component](/user/Component)
struct Index {
  private swiperController: SwiperController = new SwiperController()
  private data: MyDataSource = new MyDataSource([])
  [@State](/user/State) theIndex: number = 0

  aboutToAppear(): void {
    let list: number[] = []
    for (let i = 1; i <= 15; i++) {
      list.push(i);
    }
    this.data = new MyDataSource(list)
  }

  build() {
    Column({ space: 5 }) {
      Swiper(this.swiperController) {
        LazyForEach(this.data, (item: number, index: number) => {
          Row() {
            Radio({ value: item.toString(), group: '123' })
              .checked(this.theIndex == index)
              .hitTestBehavior(HitTestMode.None)
            Text(`数组项：${item.toString()} 序号：${index + 1}`)
              .width('60%')
              .height(160)
              .backgroundColor(0xAFEEEE)
              .textAlign(TextAlign.Center)
              .fontSize(30)
          }.alignItems(VerticalAlign.Center)
          .justifyContent(FlexAlign.Center)
        }, (item: string) => item)
      }
      .width('100%')
      .onAnimationEnd((index) => {
        this.theIndex = index
      })
      .cachedCount(2)
      .index(5)
      .autoPlay(true)
      .interval(4000)
      .loop(true)
      .duration(1000)
      .itemSpace(0)
      .indicator( // 设置圆点导航点样式
        new DotIndicator()
          .itemWidth(8)
          .itemHeight(8)
          .selectedItemWidth(16)
          .selectedItemHeight(8)
          .color(Color.Gray)
          .selectedColor(Color.Blue)
          .maxDisplayCount(9))
      .displayArrow({
        // 设置导航点箭头样式
        showBackground: true,
        isSidebarMiddle: true,
        backgroundSize: 24,
        backgroundColor: Color.White,
        arrowSize: 18,
        arrowColor: Color.Blue
      }, false)
      .curve(Curve.Linear)

      Row({ space: 12 }) {
        Button('showNext')
          .onClick(() => {
            this.swiperController.showNext()
          })
        Button('showPrevious')
          .onClick(() => {
            this.swiperController.showPrevious()
          })
      }.margin(5)
    }.width('100%')
    .margin({ top: 5 })
  }
}