HarmonyOS鸿蒙Next中如何给Swiper添加Refresh上下拉刷新

HarmonyOS鸿蒙Next中如何给Swiper添加Refresh上下拉刷新 如何给Swiper添加Refresh上下拉刷新

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试试

@Entry
@Component
struct SwiperItemLeak {
  private swiperController: SwiperController = new SwiperController()
  private curSwiperIndex = 0;
  private list: number[] = []
  @State isStopSwiperSlide: boolean = false;
  @State positionY: number = 0;
  @State index: number = 0;
  private isRefresh: boolean = false;
  aboutToAppear(): void {
    for (let i = 1; i <= 10; i++) {
      this.list.push(i);
    }
  }
  build() {
    Stack({ alignContent: Alignment.TopStart }) {
      Row() {
        LoadingProgress()
          .width(100)
          .color(Color.White)
      }.zIndex(1).width('100%').justifyContent(FlexAlign.Center).alignItems(VerticalAlign.Center)
      Swiper(this.swiperController) {
        ForEach(this.list, (item: number) => {
          Text(item.toString())
            .width('100%')
            .height('100%')
            .backgroundColor(0xAFEEEE * ((item + 1) / 0x0f))
            .textAlign(TextAlign.Center)
            .fontSize(30)
        })
      }
      .vertical(true)
      .width("100%")
      .height("100%")
      .cachedCount(3)
      .index(this.index)
      .autoPlay(false)
      .indicator(false)
      .effectMode(EdgeEffect.None)
      .loop(false)
      .duration(100)
      .disableSwipe(this.isStopSwiperSlide)
      .displayCount(1)
      .itemSpace(0)
      .curve(Curve.Linear)
      .backgroundColor(Color.Red)
      .translate({ x: 0, y: this.positionY, z: 0 })
      .zIndex(10)
      .onChange((index: number) => {
        console.info(index.toString())
        this.curSwiperIndex = index;
      })
      .parallelGesture(
        PanGesture()
          .onActionStart((event: GestureEvent) => {
          })
          .onActionUpdate((event: GestureEvent) => {
            if (event && this.curSwiperIndex == 0) {
              if (event.offsetY > 0) {
                this.positionY = event.offsetY;
                this.isStopSwiperSlide = true;
                this.isRefresh = true;
              } else {
                this.positionY = 0;
                this.isStopSwiperSlide = false;
                this.isRefresh = false;
              }
            } else if (event && this.curSwiperIndex === this.list.length - 1) {
              if (event.offsetY < 0) {
                this.index = this.curSwiperIndex;
                this.isStopSwiperSlide = true;
                this.positionY = event.offsetY;
                this.isRefresh = true;
              } else {
                this.isStopSwiperSlide = false;
                this.positionY = 0;
                this.isRefresh = false;
              }
            }
          })
          .onActionEnd(() => {
            if (this.isRefresh) {
              setTimeout(() => {
                this.isStopSwiperSlide = false;
                this.positionY = 0;
                this.isRefresh = false;
              }, 1000);
            }
          })
      )
      Row() {
        LoadingProgress()
          .width(100)
          .color(Color.White)
      }
      .zIndex(1)
      .width('100%')
      .height('100%')
      .justifyContent(FlexAlign.Center)
      .alignItems(VerticalAlign.Bottom)
    }.width('100%').height("100%").backgroundColor(Color.Pink)
  }
}

更多关于HarmonyOS鸿蒙Next中如何给Swiper添加Refresh上下拉刷新的实战系列教程也可以访问 https://www.itying.com/category-93-b0.html


在HarmonyOS鸿蒙Next中,给Swiper组件添加上下拉刷新功能可以通过使用Refresh组件来实现。Refresh组件是鸿蒙系统提供的用于实现下拉刷新的标准组件。以下是实现步骤:

  1. 导入相关模块: 确保在代码中导入了RefreshSwiper组件所需的模块。

    import { Refresh, Swiper, SwiperItem } from '[@ohos](/user/ohos)/refresh';
    
  2. 创建Swiper组件: 在页面中创建Swiper组件,并添加SwiperItem作为子组件。

    [@Component](/user/Component)
    struct MySwiper {
      build() {
        Swiper() {
          SwiperItem() {
            // SwiperItem内容
          }
          SwiperItem() {
            // SwiperItem内容
          }
        }
      }
    }
    
  3. 添加Refresh组件: 将Swiper组件包裹在Refresh组件中,并设置RefreshonRefresh回调函数来处理刷新逻辑。

    [@Component](/user/Component)
    struct MyRefreshSwiper {
      @State isRefreshing: boolean = false;
    
      build() {
        Refresh({
          refreshing: this.isRefreshing,
          onRefresh: () => {
            this.isRefreshing = true;
            // 模拟异步刷新操作
            setTimeout(() => {
              this.isRefreshing = false;
            }, 2000);
          }
        }) {
          MySwiper()
        }
      }
    }
    
  4. 控制刷新状态: 通过@State装饰器定义一个状态变量isRefreshing来控制刷新状态。在onRefresh回调中,设置isRefreshingtrue以显示刷新动画,在刷新完成后将其设置为false

通过以上步骤,你可以在HarmonyOS鸿蒙Next中为Swiper组件添加上下拉刷新功能。

在HarmonyOS鸿蒙Next中,给Swiper组件添加上下拉刷新功能,可以使用Refresh组件包裹Swiper,并通过onRefresh事件处理刷新逻辑。示例代码如下:

import { Refresh, Swiper } from '@ohos/arkui';

function MyComponent() {
  const handleRefresh = () => {
    // 刷新逻辑
    console.log("刷新中...");
  };

  return (
    <Refresh onRefresh={handleRefresh}>
      <Swiper>
        {/* Swiper内容 */}
      </Swiper>
    </Refresh>
  );
}

Refresh组件提供了下拉刷新功能,onRefresh事件在用户下拉时触发,你可以在其中执行数据更新等操作。

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