Scroll组件如何通过代码的方式停止滚动

@Entry 
@Component 
struct ScrollIndex { 
  scrollerTop: Scroller = new Scroller() 
  scrollerBottom: Scroller = new Scroller() 
  @State dataListTop: string[] = ["a", "b", 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', "l"] 
  @State dataListBottom: string[] = ["a", "b", 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', "l"] 
 
  build() { 
    Column() { 
      List({ space: 8, scroller: this.scrollerTop }) { 
        ForEach(this.dataListTop, (item: string) => { 
          ListItem() { 
            Row() { 
              Text("item" + item) 
            } 
            .alignItems(VerticalAlign.Center) 
            .width(100) 
            .justifyContent(FlexAlign.Center) 
            .backgroundColor(Color.Pink) 
            .borderRadius(5) 
            .height("100%") 
          }.height("100%") 
        }) 
      }.height(60).listDirection(Axis.Horizontal) 
      .scrollBar(BarState.Off) 
 
      Divider().color(Color.Red).height(10) 
 
      List({ space: 8, scroller: this.scrollerBottom }) { 
        ForEach(this.dataListBottom, (item: string) => { 
          ListItem() { 
            Row() { 
              Text("item" + item) 
            } 
            .alignItems(VerticalAlign.Center) 
            .width(100) 
            .justifyContent(FlexAlign.Center) 
            .backgroundColor(Color.Pink) 
            .borderRadius(5) 
            .height("100%") 
          }.height("100%") 
        }) 
      }.height(60).listDirection(Axis.Horizontal) 
      .scrollBar(BarState.Off) 
      .onScroll((offset: number, state: ScrollState) => { 
        this.scrollerTop.scrollBy(offset, 0) 
      }) 
    }.width("100%").height("100%") 
  } 
}