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
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:
-
导入相关模块: 确保在代码中导入了
Refresh
和Swiper
组件所需的模块。import { Refresh, Swiper, SwiperItem } from '[@ohos](/user/ohos)/refresh';
-
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 } } } }
-
添加Refresh组件: 将
Swiper
组件包裹在Refresh
组件中,并设置Refresh
的onRefresh
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() } } }
-
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isRefreshing
为true
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。