#鸿蒙通关秘籍#何在HarmonyOS Next中监听轮播图的切换事件？

可以利用Swiper组件的onChange事件监听每次轮播图切换时触发该事件，返回当前显示的子组件索引，从而实现对轮播图切换事件的响应：

@Entry
@Component
struct ChangeEventSwiper {
  controller: SwiperController = new SwiperController()
  @State currentIndex: number = 0
  imageList: string[] = [
    'https://example.com/image1.jpg',
    'https://example.com/image2.jpg',
    'https://example.com/image3.jpg'
  ]

  build() {
    Column() {
      Swiper(this.controller) {
        ForEach(this.imageList, (item: string, index: number) => {
          Image(item).height(300).borderRadius(10)
        }, (index: number) => index.toString())
      }
      .width('100%')
      .onChange((index: number) => {
        this.currentIndex = index
        console.log(`Current index: ${this.currentIndex}`)
      })
      .indicator(new DotIndicator().color(Color.Gray).selectedColor(Color.White))
    }
    .width('100%')
    .height('100%')
  }
}
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