使用swiper组件时，设置indicator和displayArrow提示HarmonyOS 鸿蒙Next不存在

可以参考下官网文档里面的示例1的用法：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/ts-container-swiper-V5#示例1

代码：

// xxx.ets
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 SwiperExample {
  private swiperController: SwiperController = new SwiperController()
  private data: MyDataSource = new MyDataSource([])

  aboutToAppear(): void {
    let list: number[] = []
    for (let i = 1; i <= 10; i++) {
      list.push(i);
    }
    this.data = new MyDataSource(list)
  }

  build() {
    Column({ space: 5 }) {
      Swiper(this.swiperController) {
        LazyForEach(this.data, (item: string) => {
          Text(item.toString())
            .width('90%')
            .height(160)
            .backgroundColor(0xAFEEEE)
            .textAlign(TextAlign.Center)
            .fontSize(30)
        }, (item: string) => item)
      }
      .cachedCount(2)
      .index(1)
      .autoPlay(true)
      .interval(4000)
      .loop(true)
      .indicatorInteractive(true)
      .duration(1000)
      .itemSpace(0)
      .indicator( // 设置圆点导航点样式
        new DotIndicator()
          .itemWidth(15)
          .itemHeight(15)
          .selectedItemWidth(15)
          .selectedItemHeight(15)
          .color(Color.Gray)
          .selectedColor(Color.Blue))
      .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)
      .onChange((index: number) => {
        console.info(index.toString())
      })
      .onGestureSwipe((index: number, extraInfo: SwiperAnimationEvent) => {
        console.info("index: " + index)
        console.info("current offset: " + extraInfo.currentOffset)
      })
      .onAnimationStart((index: number, targetIndex: number, extraInfo: SwiperAnimationEvent) => {
        console.info("index: " + index)
        console.info("targetIndex: " + targetIndex)
        console.info("current offset: " + extraInfo.currentOffset)
        console.info("target offset: " + extraInfo.targetOffset)
        console.info("velocity: " + extraInfo.velocity)
      })
      .onAnimationEnd((index: number, extraInfo: SwiperAnimationEvent) => {
        console.info("index: " + index)
        console.info("current offset: " + extraInfo.currentOffset)
      })

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