HarmonyOS 如何监听屏幕滑动pop功能

请参考demo

import { router } from '@kit.ArkUI'
import { BusinessError } from '@kit.BasicServicesKit'

@Entry
@Component
export struct Index {

  @State list:stockListData = new stockListData([])

  aboutToAppear(): void {
    const list:ItemInfo[] = []
    for(let i = 0; i < 50 ;++i){
      let stockName = "item" + i
      let bgState = 0
      list.push(new ItemInfo(stockName,bgState))
    }
    this.list.modifyAllData(list)

  }

  build() {
    Column(){
      Text("开始").height('50')
        .width('100%').onClick(()=>{
      })
      List({space :10}){
        LazyForEach(this.list,(info:ItemInfo,index:number)=>{
          ListItem(){
            ItemView({info:info,itemFun:(name)=>{
              let itemIndex = 0
              for(let im of this.list.getAllData()){
                if (im.stockName === name) {
                  break
                }
                itemIndex++
              }
              console.info("animate--ItemView--aboutToReuse---delete Name=" + name)
              this.list.getAllData().splice(itemIndex,1)
              this.list.notifyDataDelete(itemIndex)
            }})
              .onClick(()=>{
              })
          }.height('80')
        },(info:ItemInfo,index:number)=>info.stockName + "type" +index)
      }
      .height('100%')
      .width('100%')
    }
    .height('100%')
    .width('100%')
  }
}

@Reusable
@Component
struct ItemView {

  @Prop info:ItemInfo


  private lastName:string=""


  aboutToAppear(): void {
    this.lastName = this.info.stockName
  }

  aboutToReuse(params: Record<string, Object>): void {
    console.info("animate--ItemView--aboutToReuse---name=" + this.info.stockName + ",lastName=" + this.lastName)

    this.lastName = this.info.stockName
  }



  @State customPopup:boolean = false

  itemFun:(name:string)=>void = (name)=>{}

  @Builder popItemsView() {
    Text("qipao pop").onClick(()=>{
      this.customPopup = !this.customPopup
      this.itemFun(this.info.stockName)
    })
  }

  build() {
    Column() {
      Flex({ justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) {
        Column() {
          Text(this.info.stockName)
            .maxFontSize('16')
            .minFontSize('8')
            .maxLines(1)
            .margin({bottom:2})
        }
        .width('36.27%')
        .alignItems(HorizontalAlign.Start)
        .padding({ left: '16', right: 8 })
      }
      .backgroundColor("#00ffea")
      .height('100%')
    }
    .bindPopup(this.customPopup, {
      builder:this.popItemsView, // 气泡的内容
      placement: Placement.Top, // 气泡的弹出位置
      offset: { x: 0, y: 30 },
      radius:12,
      popupColor: Color.Pink, // 气泡的背景色
      onStateChange: (e) => {
        console.info('yhh', JSON.stringify(e.isVisible))
        if (!e.isVisible) {
          this.customPopup= false
          // this.bgColor = this.info.topStatus == 1 ? $r('app.color.dialog_background') : $r('app.color.start_window_background')
        }else{
          this.customPopup= true
          // this.bgColor = $r('app.color.dialog_button')
        }
      }
    })
    .gesture(
      LongPressGesture({ repeat: false })// 由于repeat设置为true，长按动作存在时会连续触发，触发间隔为duration（默认值500ms）
        .onAction((event?: GestureEvent) => {
          console.log("111","LongPressGesture start event--customPopup=" + this.customPopup)
          if (event) {
            this.customPopup= !this.customPopup
          }
          // if (event && event.repeat) {
          // }
        })// 长按动作一结束触发
        .onActionEnd((event?: GestureEvent) => {
          if (event) {
          }
        })
    )
  }
}

@Observed
class ItemInfo{
  @Track
  stockName:string = "--"
  @Track
  bgState:number = 0

  constructor(name:string,bg:number) {
    this.stockName = name
    this.bgState = bg
  }
}


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

  public totalCount(): number {
    return 0;
  }

  public getData(index: number): ItemInfo | undefined {
    return undefined;
  }

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

  unregisterDataChangeListener(listener: DataChangeListener): void {
    const position = this.listeners.indexOf(listener);
    if (position >= 0) {
      this.listeners.splice(position, 1);
    }
  }

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

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

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

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

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

export class stockListData extends BasicDataSource {
  private listData : ItemInfo[] = [];
  constructor(dataArray: ItemInfo[]) {
    super()
    this.listData = dataArray;
  }
  public totalCount(): number {
    return this.listData.length;
  }
  public getAllData(): ItemInfo[] {
    return this.listData;
  }
  public getData(index: number): ItemInfo {
    return this.listData[index];
  }
  public modifyAllData(data: ItemInfo[]): void {
    this.listData = data
    this.notifyDataReload()
  }
}

监听屏幕返回可以使用onBackPressed，可参考文档

https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/ts-basic-components-navdestination-V5#onbackpressed10