HarmonyOS 嵌套滑动问题

嵌套滑动处理，除了。

nestedScroll({ scrollForward: NestedScrollMode.PARENT_FIRST, scrollBackward: NestedScrollMode.SELF_FIRST }) 1.

这种方式，还有其他方式吗？

目前遇到的问题是，外层是Scroll,里层是Swiper，Swiper里层是List，给List设置。

.nestedScroll({ scrollForward: NestedScrollMode.PARENT_FIRST, scrollBackward: NestedScrollMode.SELF_FIRST })1.

这时候嵌套滑动处理正常，需求增加下拉刷新和上拉加载，给List外层再套一层自定义的下拉刷新和上拉加载布局后，嵌套滑动处理不能工作了。

HarmonyOS

zbw_apple

2024-10-08 10:46:20

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回答 1

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FengTianYa

@Entry  
@Component  
struct WeiboPersonPage {  
  @State currentTitle: string = '顶部模块'  
  @State data: Array<string> = [];  
  @State data2: Array<string> = [];  
  mainScroller: Scroller = new Scroller();  
  tags: Array<string> = ['标签1', '标签2', '标签3', '标签4'];  
  tagScrollers: Array<Scroller> = []; //每个scroller对应一个标签  
  @State hideNavBar: boolean = true;  
  @State hideLoadingView: boolean = true;  
  @State mainListCanScroll: boolean = true;  
  @State private currentPageHeight: number = 0;  
  @State private currentPageWidth: number = 0;  
  @State private progress: number = 0; //0-10  
  @State isRefreshing: boolean = false;  
  private panOption: PanGestureOptions = new PanGestureOptions({ direction: PanDirection.Up | PanDirection.Down })  
  @State isLoadingFromBottom: boolean = false;  
  aboutToAppear() {  
    for (let i = 0; i < this.tags.length; i++) {  
      let tagScroller = new Scroller();  
      this.tagScrollers.push(tagScroller);  
    }  
    for (let i = 0; i < 2; i++) {  
      this.data.push(自定义header内容)  
    }  
    for (let i = 0; i < 50; i++) {  
      this.data2.push(Hello ${i})  
    }  
  }  
  build() {  
    Column() {  
      Navigation() {  
        Stack({ alignContent: Alignment.TopStart }) {  
          this.mainListView(this.mainScroller, this.tagScrollers)  
          Progress({ value: this.progress, total: 10, type: ProgressType.Ring })  
            .width(20)  
            .color(Color.Orange)  
            .style({  
              strokeWidth: 20,  
              status: this.isRefreshing == true ? ProgressStatus.LOADING : ProgressStatus.PROGRESSING,  
              enableSmoothEffect: true,  
              enableScanEffect: true  
            })  
            .backgroundColor(Color.Yellow)  
            .visibility((this.hideLoadingView == false || this.isRefreshing) ? Visibility.Visible : Visibility.Hidden)  
            .margin({ left: this.currentPageWidth - 23 - 20 })  
          //1.下拉超过80,则进入刷新状态  
          Button({ type: ButtonType.Normal, stateEffect: true }) {  
            Image($r('app.media.icon')).width(40).height(40)  
          }  
          .margin({ left: 23 })  
          .backgroundColor(Color.Blue)  
          .onClick(() => {  
          })  
          .visibility(this.hideNavBar == false ? Visibility.Hidden : Visibility.Visible)  
        }  
      }  
      .backgroundColor(Color.White)  
      .title(this.NavigationTitle)  
      .margin({  
        top: $r('app.media.icon')  
      })  
      .width('100%')  
      .titleMode(NavigationTitleMode.Mini)  
      .hideBackButton(false)  
      .zIndex(1)  
      .mode(NavigationMode.Auto)  
      .hideTitleBar(this.hideNavBar)  
      .parallelGesture(  
        PanGesture(this.panOption)  
          .onActionStart((event?: GestureEvent) => {  
          })  
          .onActionUpdate((event?: GestureEvent) => {  
          })  
          .onActionEnd(() => {  
            if (this.progress >= 10) {  
              //并且手指离开,执行刷新  
              this.isRefreshing = true;  
              //正在刷新的时候  
              //需要一直显示  
              console.info('开始刷新========1')  
              //在这里进行回调函数,执行若干秒  
              //举例,执行若干秒  
              setTimeout(() => {  
                this.isRefreshing = false;  
                this.data2.unshift('1111');  
              }, 2000);  
            } else {  
              this.isRefreshing = false;  
              console.info('取消刷新========1')  
            }  
          })  
      )  
    }  
    .width('100%')  
    .backgroundColor($r('app.media.icon'))  
    .height('100%')  
    .onAreaChange((oldValue: Area, newValue: Area) => {  
      console.info('onAreaChange:' + newValue.height.toString());  
      this.currentPageHeight = Math.round(newValue.height as number);  
      this.currentPageWidth = Math.round(newValue.width as number);  
    })  
  }  
  //自定义导航  
  @Builder  
  NavigationTitle() {  
    Column() {  
      Text(this.currentTitle)  
        .fontColor('#182431')  
        .fontSize(18)  
        .fontWeight(600)  
        .backgroundColor(Color.Yellow)  
        .height(56)  
    }  
    .width('67%')  
    .height(56)  
    .backgroundColor(Color.Grey)  
  }  
  @Builder  
  listView(scroller: Scroller) {  
    List({ space: 0, scroller: scroller }) {  
      ForEach(this.data2, (item: string, index?: number) => {  
        ListItem() {  
          if (this.isLoadingFromBottom) {  
            if (index == this.data2.length - 1) {  
              Row() {  
                Text('加载中...').fontSize(50)  
                Progress({ value: 0, total: 20, type: ProgressType.Ring })  
                  .width(20)  
                  .color(Color.Orange)  
                  .style({  
                    strokeWidth: 20,  
                    status: ProgressStatus.LOADING,  
                    enableSmoothEffect: true,  
                    enableScanEffect: true  
                  })  
                  .backgroundColor(Color.Red)  
              }.margin({ left: 10, right: 10 })  
            } else {  
              Row() {  
                Text(item).fontSize(50).width('100%')  
              }.margin({ left: 10, right: 10 })  
            }  
          } else {  
            Row() {  
              Text(item).fontSize(50).width('100%')  
            }.margin({ left: 10, right: 10 })  
          }  
        }  
        .backgroundColor(Color.White)  
      }, (item: string) => item)  
    }  
    .cachedCount(5)  
    .divider({ strokeWidth: 1, color: 0x222222 })  
    // 必须设置列表为滑动到边缘无效果,必须的!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!  
    .edgeEffect(EdgeEffect.None)  
    .enableScrollInteraction(this.mainListCanScroll ? false : true)  
    .onScroll((scrollOffset: number, scrollState: ScrollState) => {  
      //如果下侧列表划到了最上侧,则主list可以向下滑动,不可以向上滑动;  
      //如果下侧列表划到了最上侧,非主list可以向上滑动,不可以向下滑动  
      if (scroller.currentOffset().yOffset == 0) {  
        this.mainListCanScroll = true  
      } else {  
        this.mainListCanScroll = false  
      }  
    })  
    .onReachEnd(() => {  
      //每次只允许执行一次,执行完后在执行下一个  
      if (this.isLoadingFromBottom == true) {  
        return;  
      }  
      //当划到末尾的时候,加一行数据,用来显示加载效果  
      this.isLoadingFromBottom = true;  
      this.data2.push('占位数据');  
      //请求操作  
      //举例是一个延时操作  
      setTimeout(() => {  
        console.info('加载结束=====1')  
        this.isLoadingFromBottom = false;  
        this.data2.pop();  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
        this.data2.push('新的数据' + this.data2.length);  
      }, 3000);  
    })  
  }  
  @Builder  
  mainListView(mainScroller: Scroller, tagScrollers: Array<Scroller>) {  
    List({ space: 0, scroller: mainScroller }) {  
      ForEach(this.data, (item: string, index?: number) => {  
    if (index == 0) {  
      ListItem() {  
        Row() {  
          Text(item).fontSize(50).width('100%')  
        }.margin({ left: 10, right: 10 })  
      }  
      .height(400)   
      .backgroundColor(Color.Red)  
    } else {  
      ListItem() {  
        Tabs({ barPosition: BarPosition.Start }) {  
          TabContent() {  
            this.listView(tagScrollers[0])  
          }  
          .tabBar('首页')  
          TabContent() {  
            this.listView(tagScrollers[1])  
          }  
          .tabBar('推荐')  
          TabContent() {  
            this.listView(tagScrollers[2])  
          }  
          .tabBar('发现')  
          TabContent() {  
            this.listView(tagScrollers[3])  
          }  
          .tabBar("我的")  
        }  
      }  
      .height(this.currentPageHeight - 56 - 40)  
 //这里要设置一个全屏减去导航栏56减去标签栏40的高度  
          .backgroundColor(Color.Green)  
        }  
      }, (item: string) => item)  
    }  
    .cachedCount(2)  
    .backgroundColor(Color.White)  
    .divider({  
      strokeWidth: 1,  
      startMargin: '3.5%',  
      endMargin: '2%',  
      color: '#f2f2f2'  
    })  
    .edgeEffect(EdgeEffect.None) // 必须设置列表为滑动到边缘无效果  
    .divider({ strokeWidth: 1, color: 0x222222 })  
    // 必须设置列表为滑动到边缘无效果  
    .edgeEffect(EdgeEffect.Spring)  
    .scrollBar(BarState.Off)  
    .enableScrollInteraction(this.mainListCanScroll)  
    .onScroll((scrollOffset: number, scrollState: ScrollState) => {  
      console.info('offset1:' + this.mainScroller.currentOffset().yOffset);  
      let currentOffsetY = Math.round(this.mainScroller.currentOffset().yOffset);  
      //导航栏  
      if (currentOffsetY > 100) {  
        this.hideNavBar = false  
      } else {  
        this.hideNavBar = true  
      }  
      //主list和分list滑动控制  
      if (currentOffsetY == 0) {  
        this.mainListCanScroll = true  
      } else {  
        if (currentOffsetY >= 400) {  
          this.mainListCanScroll = false  
        } else {  
          this.mainListCanScroll = true  
        }  
      }  
      //需要控制下拉和上拉后的刷新  
      //下拉超过80,松手后检测,如果松手后的偏移量超过80,则刷新  
      //如果松手后的偏移量不超过,则不执行刷新操作  
      if (currentOffsetY >= 0) {  
        this.hideLoadingView = true  
      } else {  
        this.hideLoadingView = false  
      }  
      this.progress = currentOffsetY / 80 * (-10);  
    })  
    .onReachStart(() => {  
      console.info('到最上面了========1')  
    })  
    .onReachEnd(() => {  
      console.info('到最底部了========1')  
    })  
  }  
}1.
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2024-10-08 17:08:16

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HarmonyOS 嵌套滑动问题

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