HarmonyOS 鸿蒙Next Swiper有办法分滑动方向分开控制EdgeEffect吗?
HarmonyOS 鸿蒙Next Swiper有办法分滑动方向分开控制EdgeEffect吗?
要怎么实现呢?
可根据index的坐标确认effectMode属性的类型,可参考以下demo
// xxx.ets
class MyDataSource0725 implements IDataSource {
private list: number[] = []
constructor(list: number[]) {
this.list = list
}
totalCount(): number {
return this.list.length
}
getData(index: number): number {
return this.list[index]
}
registerDataChangeListener(listener: DataChangeListener): void {
}
unregisterDataChangeListener() {
}
}
[@Entry](/user/Entry)
[@Component](/user/Component)
struct SwiperExample0725 {
private swiperController: SwiperController = new SwiperController()
private data: MyDataSource0725 = new MyDataSource0725([])
[@State](/user/State) controlNumber: number = 0;
[@State](/user/State) needEffect: boolean = true;
[@State](/user/State) curIndex: number = 0;
aboutToAppear(): void {
let list: number[] = []
for (let i = 1; i <= 4; i++) {
list.push(i);
}
this.data = new MyDataSource0725(list)
}
build() {
Column({ space: 5 }) {
Swiper(this.swiperController) {
LazyForEach(this.data, (item: string) => {
Text(item.toString())
.width('90%')
.height(160)
.backgroundColor(0xAFEEEE)
.textAlign(TextAlign.Center)
.fontSize(30)
}, (item: string) => item)
}
.vertical(true)
.effectMode(this.curIndex === 0 ? EdgeEffect.None : EdgeEffect.Spring )
.cachedCount(2)
.index($$this.curIndex)
.autoPlay(false)
.loop(false)
.indicatorInteractive(true)
.itemSpace(0)
.indicator( // 设置圆点导航点样式
new DotIndicator()
.itemWidth(15)
.itemHeight(15)
.selectedItemWidth(15)
.selectedItemHeight(15)
.color(Color.Gray)
.selectedColor(Color.Blue))
.curve(Curve.Linear)
.onChange((index: number) => {
console.info(index.toString())
})
}.width('100%').height('100%')
.margin({ top: 5 })
}
}
通过手势拦截增强能力实现onGestureRecognizerJudgeBegin,参考demo:
// xxx.ets
class MyDataSource0725 implements IDataSource {
private list: number[] = []
constructor(list: number[]) {
this.list = list
}
totalCount(): number {
return this.list.length
}
getData(index: number): number {
return this.list[index]
}
registerDataChangeListener(listener: DataChangeListener): void {
}
unregisterDataChangeListener() {
}
}
[@Entry](/user/Entry)
[@Component](/user/Component)
struct SwiperExample0725 {
private swiperController: SwiperController = new SwiperController()
private data: MyDataSource0725 = new MyDataSource0725([])
[@State](/user/State) controlNumber: number = 0;
[@State](/user/State) needEffect: boolean = true;
[@State](/user/State) curIndex: number = 0;
aboutToAppear(): void {
let list: number[] = []
for (let i = 1; i <= 1; i++) {
list.push(i);
}
this.data = new MyDataSource0725(list)
}
build() {
Column({ space: 5 }) {
Swiper(this.swiperController) {
LazyForEach(this.data, (item: string) => {
Text(item.toString())
.width('90%')
.height(160)
.backgroundColor(0xAFEEEE)
.textAlign(TextAlign.Center)
.fontSize(30)
}, (item: string) => item)
}
.vertical(true)
.effectMode(EdgeEffect.Spring)
.cachedCount(2)
.index($$this.curIndex)
.autoPlay(false)
.loop(false)
.indicatorInteractive(true)
.itemSpace(0)
.indicator( // 设置圆点导航点样式
new DotIndicator()
.itemWidth(15)
.itemHeight(15)
.selectedItemWidth(15)
.selectedItemHeight(15)
.color(Color.Gray)
.selectedColor(Color.Blue))
.curve(Curve.Linear)
.onChange((index: number) => {
console.info(index.toString())
})
.onGestureRecognizerJudgeBegin((event: BaseGestureEvent, current: GestureRecognizer, )=>{
if (current.isBuiltIn() && current.getType() == GestureControl.GestureType.PAN_GESTURE) {
let panEvent = event as PanGestureEvent;
if (this.curIndex === 0 && panEvent.velocityY > 0) {
return GestureJudgeResult.REJECT;
}
}
return GestureJudgeResult.CONTINUE;
})
}.width('100%').height('100%')
.margin({ top: 5 })
}
}
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在HarmonyOS鸿蒙系统中,针对Next Swiper组件实现分滑动方向控制EdgeEffect,可以通过自定义Swiper的行为来实现。具体来说,你可以通过监听滑动事件(如onTouchEvent或onFling),判断滑动的方向(左滑、右滑、上滑、下滑),然后根据滑动方向分别设置EdgeEffect。
鸿蒙系统提供了EdgeEffect类用于处理边缘发光效果,你可以通过控制EdgeEffect的实例和参数,来分别处理不同滑动方向上的边缘效果。例如,在检测到左滑时,启动左侧EdgeEffect;在检测到右滑时,启动右侧EdgeEffect。
实现这一功能需要深入了解Swiper组件的事件处理机制,以及EdgeEffect的使用。你可能需要重写Swiper的部分方法,或者在Swiper的外部添加逻辑来监听滑动事件并控制EdgeEffect。
由于鸿蒙系统的API和组件可能随着版本更新而变化,具体实现细节可能需要参考最新的鸿蒙开发文档和API说明。
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