HarmonyOS 滑动问题

可以使用组件的scrollToIndex 方法 ，跳转到指定位置，参考链接：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/ts-container-scroll-V5#scrolltoindex可参考demo：

@Entry
@Component
struct CategoryPage3 {
  @State categoryTabIndex: number = 1;
  @State scrollerIndex: number = 1;
  @State sideClickFlag: boolean = false;
  @State tabTitle:string[] = ['页签1','页签2','页签3','页签4','页签5'];
  scroller: Scroller = new Scroller();
  build() {
    Column() {
      Tabs({
        index: this.categoryTabIndex,
        barPosition: BarPosition.End
      })
      {
        ForEach(this.tabTitle, (item: string, index?: number) => {
          TabContent() {
            GridRow({
              columns: 4
            }) {
              GridCol() {
                SideListComponent({
                  sideListIndex: $scrollerIndex,
                  sideClickFlag: $sideClickFlag,
                  scroller: this.scroller = new Scroller()
                })
              }
              GridCol({
                span: 3
              }) {
                DetailListComponent({
                  sideListIndex: $scrollerIndex,
                  sideClickFlag: $sideClickFlag,
                  scroller: this.scroller
                })
                  .margin( { top: "29vp" })
              }
            }
            .margin({
              left: "24vp",
              right: "24vp"
            })
          }
          .tabBar(this.TabBottom(item, index))
        }, (item: string, index?: number) => index + JSON.stringify(item))
      }
      .layoutWeight(1)
      .barWidth('100%')
      .barHeight("56vp")
      .barMode(BarMode.Fixed)
      .onChange((index: number) => {
        this.categoryTabIndex = index;
      })
    }
    .backgroundColor("#F1F3F5")
  }
  @Builder TabBottom(item: string, index?: number) {
    Column() {
      Text(item)
        .width('100%')
        .height("14vp")
        .fontSize("10fp")
        .fontWeight(500)
        .fontColor(this.categoryTabIndex === index ? "#007DFF" : "#99182431")
        .textAlign(TextAlign.Center)
        .margin({ bottom: "7vp" })
    }
    .justifyContent(FlexAlign.Center)
    .height('100%')
    .width('100%')
  }
}
@Component
export struct DetailListComponent {
  scroller: Scroller = new Scroller();
  // @Prop detailListBreakpoint: string = '';
  @State subTitle:string[] = ['分类1子标题1','分类2子标题2','分类3子标题3','分类4子标题4','分类5子标题5','分类6子标题6'];
  @Link sideListIndex: number;
  @Link sideClickFlag: boolean;
  build() {
    List({ scroller: this.scroller }) {
      ForEach(this.subTitle, (item: string) => {
        ListItem() {
          Column() {
            Text(item)
              .height("22vp")
              .fontSize("16fp")
              .fontColor("#FF182431")
              .fontWeight(500)
              .align(Alignment.Start)
            Text('内容')
              .width('100%')
              .height("72vp")
              .textAlign(TextAlign.Center)
              .fontSize("14fp")
              .fontWeight(500)
              .align(Alignment.Center)
              .borderRadius("16vp")
              .backgroundColor("#0C000000")
              .margin({top:10})
            Text('内容')
              .width('100%')
              .height("72vp")
              .textAlign(TextAlign.Center)
              .fontSize("14fp")
              .fontWeight(500)
              .align(Alignment.Center)
              .borderRadius("16vp")
              .backgroundColor("#0C000000")
              .margin({top:10})
            Text('内容')
              .width('100%')
              .height("72vp")
              .textAlign(TextAlign.Center)
              .fontSize("14fp")
              .fontWeight(500)
              .align(Alignment.Center)
              .borderRadius("16vp")
              .backgroundColor("#0C000000")
              .margin({top:10})
          }
          .height(300)
          .alignItems(HorizontalAlign.Start)
        }
        .height(300)
      }, (item: string, index?: number) => index + JSON.stringify(item))
    }
    .width('100%')
    .onScrollIndex((firstIndex: number) => {
      if(!this.sideClickFlag) {
        this.sideListIndex = firstIndex;
      }
      this.sideClickFlag = false;
      this.scroller.scrollToIndex(this.sideListIndex);
    })
  }
}
 
@Component
export struct SideListComponent {
  scroller: Scroller = new Scroller();
  @Link sideListIndex: number;
  @Link sideClickFlag: boolean;
  @State listData:string[] = ['分类1','分类2','分类3','分类4','分类5','分类6'];

  build() {
    Flex({ justifyContent: FlexAlign.SpaceBetween }) {
      List() {
        ForEach(this.listData, (item: string, index?: number) => {
          ListItem() {
            Text(item)
              .fontSize("14fp")
              .fontWeight('400')
              .fontColor(this.sideListIndex === index ? '#007DFF' : '#182431')
              .textAlign(TextAlign.Start)
              .margin({
                top: '12',
                bottom: '16',
                left: '0'
              })
              .width('100%')
              .onClick(() => {
                this.sideClickFlag = true;
                if (index != undefined) {
                  this.sideListIndex = index;
                }
                this.scroller.scrollToIndex(this.sideListIndex);
              })
          }.animation({
            duration: 1200,
            curve: Curve.Friction,
            delay: 500,
            iterations: -1, // 设置-1表示动画无限循环
            playMode: PlayMode.Alternate,
            expectedFrameRateRange: {
              min: 20,
              max: 120,
              expected: 90,
            }
          })
        })
      }

      .constraintSize({
        minWidth: (100)
      })
      .width('100%')
      .height('100%')
      .margin({ top: '12vp' })

      Divider()
        .vertical(true)
        .color("#0C000000")
        .strokeWidth(1)
        .margin({ bottom: '8vp' })
    }
  }}
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