HarmonyOS 子组件如何触发父组件中的方法

示例参考如下：

import hilog from '@ohos.hilog';

// import { HighSpeedItem } from '../bean/HighSpeedRseponse';

interface listItem {
  money: string
  text: string
  title: string
  data: string
}

class StringData {
  money: string
  text: string
  title: string
  data: string

  constructor(money: string, text: string, title: string, data: string) {
    this.money = money;
    this.text = text;
    this.title = title;
    this.data = data;
  }
}

class BasicDataSource implements IDataSource {
  private listeners: DataChangeListener[] = [];
  private originDataArray: StringData[] = [];

  public totalCount(): number {
    return 0;
  }

  public getData(index: number): StringData {
    return this.originDataArray[index];
  }

  registerDataChangeListener(listener: DataChangeListener): void {
    if (this.listeners.indexOf(listener) < 0) {
      console.info('add listener');
      this.listeners.push(listener);
    }
  }

  unregisterDataChangeListener(listener: DataChangeListener): void {
    const pos = this.listeners.indexOf(listener);
    if (pos >= 0) {
      console.info('remove listener');
      this.listeners.splice(pos, 1);
    }
  }

  notifyDataReload(): void {
    this.listeners.forEach(listener => {
      listener.onDataReloaded();
    })
  }

  notifyDataAdd(index: number): void {
    this.listeners.forEach(listener => {
      listener.onDataAdd(index);
    })
  }

  notifyDataChange(index: number): void {
    this.listeners.forEach(listener => {
      listener.onDataChange(index);
    })
  }

  notifyDataDelete(index: number): void {
    this.listeners.forEach(listener => {
      listener.onDataDelete(index);
    })
  }

  notifyDataMove(from: number, to: number): void {
    this.listeners.forEach(listener => {
      listener.onDataMove(from, to);
    })
  }
}

class MyDataSource extends BasicDataSource {
  private dataArray: StringData[] = [];

  public totalCount(): number {
    return this.dataArray.length;
  }

  public getData(index: number): StringData {
    return this.dataArray[index];
  }

  public addData(index: number, data: StringData): void {
    this.dataArray.splice(index, 0, data);
    this.notifyDataAdd(index);
  }

  public pushData(data: StringData): void {
    this.dataArray.push(data);
    this.notifyDataAdd(this.dataArray.length - 1);
  }

  public reloadData(): void {
    this.notifyDataReload();
  }

  //删除全部数据
  public clear(): void {
    // this.dataArray = []
    // this.notifyDataReload();
    this.empty()
    this.refresh()
  }

  public empty(): void {
    this.dataArray = []
  }

  public refresh(): void {
    this.notifyDataReload();

  }
}


@Entry
@Component
struct Index {
  private title: string = '我的优惠券'
  private data: MyDataSource = new MyDataSource();
  @State currentIndex: number = 0
  @State highSheepNum: number = 0
  @State tollStationNum: number = 0
  @State highSheepCur: number = 0
  @State highSheepArray: highSheepItem[] = [
    new highSheepItem(0, "全部", 'all', 0, true),
    new highSheepItem(1, "商品", 'all', 0, false),
    new highSheepItem(2, "体验", 'all', 0, false),
  ] //高速//拥堵 type = 1  管制 type =2 事故 type = 3 施工 type = 4 其他 type = 5
  @State listDate: listItem[] = [
    {
      money: '￥360',
      text: '满3500元立减',
      title: '限部分商品使用',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥250',
      text: '满2500元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥200',
      text: '满1800元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥150',
      text: '满1300元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥80',
      text: '满800元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥360',
      text: '满3500元立减',
      title: '限部分商品使用',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥250',
      text: '满2500元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥200',
      text: '满1800元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥150',
      text: '满1300元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥80',
      text: '满800元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥360',
      text: '满3500元立减',
      title: '限部分商品使用',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥250',
      text: '满2500元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥200',
      text: '满1800元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥150',
      text: '满1300元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥80',
      text: '满800元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥360',
      text: '满3500元立减',
      title: '限部分商品使用',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥250',
      text: '满2500元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥200',
      text: '满1800元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥150',
      text: '满1300元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥80',
      text: '满800元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥360',
      text: '满3500元立减',
      title: '限部分商品使用',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥250',
      text: '满2500元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥200',
      text: '满1800元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥150',
      text: '满1300元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥80',
      text: '满800元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥360',
      text: '满3500元立减',
      title: '限部分商品使用',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥250',
      text: '满2500元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥200',
      text: '满1800元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥150',
      text: '满1300元立减',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    },
    {
      money: '￥80',
      text: '满800元立减1',
      title: '适用于体验',
      data: '2024.02.23-2024.03.15'
    }
  ]

  aboutToAppear(): void {
    // 请求数据模拟
    this.init()
  }

  changeData(title: string) {
    this.data.clear();
    let that = this;
    setTimeout(() => {
      // hilog.info(0x0000, '数据1', '1')
      // hilog.info(0x0000, '数据2',JSON.stringify(that.listDate))
      // hilog.info(0x0000, '数据3',title)
      for (let i = 0; i <= that.listDate.length; i++) {
        hilog.info(0x0000, '数据4', JSON.stringify(that.listDate[i]))
        let listDate: listItem = that.listDate[i] as listItem;
        if (listDate?.title?.indexOf(title) !== -1) {
          that.data.pushData(new StringData(listDate?.money, listDate?.text, listDate?.title, listDate?.data));
        }
      }
      this.data.reloadData();
      this.highSheepNum = this.data.totalCount()
      hilog.info(0x0000, '组件加载2', JSON.stringify(this.data))

    }, 500)

  }

  build() {
    Column() {
      Tabs({ barPosition: BarPosition.Start }) {
        TabContent() {
          this.highSpeedBuilder()
        }.tabBar(this.TabRoadBuilder(0, '优惠券', this.highSheepNum))

        TabContent() {
          this.highSpeedBuilder()
        }.tabBar(this.TabRoadBuilder(1, '用于体验', this.tollStationNum))
      }
      .barWidth('100%')
      .scrollable(false)
      .vertical(false)
      .barHeight(40)
      .width('100%')
      .onChange((index: number) => {
        this.currentIndex = index;
        this.changeData('体验')

        if (index == 1) {
          // this.getStationEvent()
        } else if (index == 2) {
          // this.getServiceEvent()

          // this.getEventListIntroduc()
        }
      })
      .width('100%')
      .height('100%')
      .backgroundColor('#ffffff')
    }.width('100%').height('100%')

  }

  @Builder
  TabRoadBuilder(index: number, name: string, num: number) {
    Column() {
      Text(name + '(' + num + ')')
        .fontColor(this.currentIndex === index ? '#015DFF' : '#999999')
        .fontSize(16)
        .fontWeight(this.currentIndex === index ? 500 : 400)
        .lineHeight(22)
        .margin({ top: 6, bottom: 6 })

      Divider().strokeWidth(3).color(this.currentIndex === index ? '#015DFF' : '#999999').width(24)
    }.width('100%')
  }

  @Builder
  highSpeedBuilder() {
    Column() {
      Flex({ justifyContent: FlexAlign.SpaceAround }) {
        ForEach(this.highSheepArray, (item: highSheepItem) => {
          replayComp({
            item: item,
            changeData: this.changeData.bind(this),
            highSheepCur: $highSheepCur
          })
        }, (item: highSheepItem) => item.title)
      }
      .padding({
        left: 10,
        right: 10,
        bottom: 12,
        top: 12
      })
      .width('100%')

      Text(this.title)
        .fontSize(18)
        .fontWeight(FontWeight.Bold)
        .fontFamily('Arial')
      Row() {
        TextInput({ placeholder: '请输入优惠码' })
          .width('75%')
          .fontColor(Color.Blue)
          .fontSize(14)
          .fontStyle(FontStyle.Italic)
          .fontWeight(FontWeight.Bold)
          .fontFamily('Arial')
          .placeholderColor(0x999999)
          .placeholderFont({
            size: 16,
            weight: FontWeight.Medium,
            family: 'cursive',
            style: FontStyle.Italic
          })

        Button('筛选', { type: ButtonType.Normal, stateEffect: true })
          .width('25%')
          .fontSize(14)
          .fontWeight(FontWeight.Medium)
          .backgroundColor('#cccccc')
          .borderRadius(5)
          .onClick(() => {


          })
      }
      .padding({ top: 35, bottom: 10 })

      Row() {
        Text(`您有${this.highSheepNum}张优惠券可领用～`)
          .fontSize(12)
          .textAlign(TextAlign.End)
        Text('>')
      }
      .margin({ bottom: 10 })

      List({ space: 10 }) {
        LazyForEach(this.data, (item: listItem) => {
          ListItem() {
            Row() {
              Column() {
                Text(item.money)
                  .margin({ top: 20, bottom: 20 })
                  .fontColor('#f9f4d7')
                  .borderRadius(5)
                Text(item.text)
                  .textAlign(TextAlign.Center)
                  .fontSize(12)
                  .fontColor('#f9f4d7')
                  .borderRadius(5)
              }
              .width('30%')
              .height(100)
              .backgroundColor('#fe6a48')

              Column() {
                Row() {
                  Text(item.title)
                    .textAlign(TextAlign.Start)
                    .margin({ top: 15, left: -110, bottom: 40 })
                }

                Row() {
                  Text(item.data)
                    .fontSize(10)
                    .margin({ left: -5, right: 25 })
                  Button('去使用', { type: ButtonType.Capsule })
                    .width('32%')
                    .height(20)
                    .fontSize(12)
                    .fontColor('#f6a200')
                    .backgroundColor('#cccccc')
                    .borderColor('#f6a200')
                }
              }
              .width('70%')
              .height(100)
              .backgroundColor('#fff')
            }.onAppear(() => {
              // hilog.info(0x0000, '组件加载', item.title)
              // hilog.info(0x0000, '组件加载1', JSON.stringify(this.data.totalCount()))
            })
          }
        }, (item: listItem) => item.title)
      }
    }
    .padding(12)
    .height('100%')
    .backgroundColor(0xF1F3F5)
  }

  @Builder
  tollStationsBuilder() {
    Column() {
      Text('测试')
    }
  }

  init() {
    for (let i = 0; i < this.listDate.length; i++) {
      // hilog.info(0x0000, '循环',this.listDate[i].title)
      this.data.pushData(new StringData(this.listDate[i].money, this.listDate[i].text, this.listDate[i].title,
        this.listDate[i].data));
    }
    this.highSheepNum = this.data.totalCount()
    this.Statistics()
    // console.log(JSON.stringify(this.data),'[Log]')
  }

  Statistics() {
    let controlNum: number = 0; //商品
    let congestionNum: number = 0; //体验
    for (let i = 0; i < this.listDate.length; i++) {
      if (this.listDate[i].title?.indexOf('商品') !== -1) {
        controlNum++
      }
      if (this.listDate[i].title?.indexOf('体验') !== -1) {
        congestionNum++
      }
    }
    for (let j = 0; j < this.highSheepArray.length; j++) {
      if (this.highSheepArray[j].title == '全部') {
        this.highSheepArray[j].number = this.highSheepNum
      }
      if (this.highSheepArray[j].title == '商品') {
        this.highSheepArray[j].number = controlNum
      }
      if (this.highSheepArray[j].title == '体验') {
        this.highSheepArray[j].number = congestionNum
      }

    }
  }
}

@Component
struct replayComp {
  @ObjectLink item: highSheepItem
  @Link highSheepCur: number
  @State selectedFontColor: string = '#015DFF'
  changeData = (title: string, highSheepCur: number) => {
  }

  build() {
    Column() {
      Text(this.item.title + '(' + this.item.number + ')')
        .fontSize(14)
        .fontColor(this.highSheepCur == this.item.index ? '#015DFF' : '#999999')
        .fontWeight(this.highSheepCur === this.item.index ? 500 : 400)
        .margin({ bottom: 6 })
      Divider()
        .strokeWidth(3)
        .color(this.highSheepCur === this.item.index ? this.selectedFontColor : Color.White)
        .width(24)

    }.onClick(() => {
      this.highSheepCur = this.item.index;
      this.changeData(this.item.title, this.highSheepCur)
      // 1、想在这里面触发父级的方法changeData 怎么触发
      // 2、点击的时候怎么能做到切换样式
    })
  }
}

@Observed
class highSheepItem {
  index: number
  title: string
  code: string
  number: number
  ischeck: boolean

  constructor(index: number, title: string, code: string, number: number, ischeck: boolean) {
    this.index = index
    this.title = title
    this.code = code
    this.number = number
    this.ischeck = ischeck
  }
}