鸿蒙列表的吸顶/吸底

// xxx.ets
@Entry
@Component
struct ListItemGroupExample {
  private timeTable: TimeTable[] = [
    {
      title: '星期一',
      projects: ['语文', '数学', '英语']
    },
    {
      title: '星期二',
      projects: ['物理', '化学', '生物']
    },
    {
      title: '星期三',
      projects: ['历史', '地理', '政治']
    },
    {
      title: '星期四',
      projects: ['美术', '音乐', '体育']
    }
  ]

  @Builder
  itemHead(text: string) {
    Text(text)
      .fontSize(20)
      .backgroundColor(0xAABBCC)
      .width("100%")
      .padding(10)
  }

  @Builder
  itemFoot(num: number) {
    Text('共' + num + "节课")
      .fontSize(16)
      .backgroundColor(0xAABBCC)
      .width("100%")
      .padding(5)
  }

  build() {
    Column() {
      List({ space: 20 }) {
        ForEach(this.timeTable, (item: TimeTable) => {
          ListItemGroup({ header: this.itemHead(item.title), footer: this.itemFoot(item.projects.length) }) {
            ForEach(item.projects, (project: string) => {
              ListItem() {
                Text(project)
                  .width("100%")
                  .height(100)
                  .fontSize(20)
                  .textAlign(TextAlign.Center)
                  .backgroundColor(0xFFFFFF)
              }
            }, (item: string) => item)
          }
          .divider({ strokeWidth: 1, color: Color.Blue }) // 每行之间的分界线
        })
      }
      .width('90%')
      .sticky(StickyStyle.Header | StickyStyle.Footer)
      .scrollBar(BarState.Off)
    }
    .width('100%')
    .height('100%')
    .backgroundColor(0xDCDCDC)
    .padding({ top: 5 })
  }
}

interface TimeTable {
  title: string;
  projects: string[];
}