HarmonyOS 项目的防抖和截流怎么实现

截流的话性能问题应该不大,本来做的就是多次点击，只在规定时间内执行一次，效果就是防止用户连续点击的.

1、实现防抖可参考一下demo：

@Entry
@Component
struct SearchDemo{
@State timeout: number = -1;
build() {
Column(){
Text('点击')
.fontSize('25fp')
.fontColor(Color.White)
.fontWeight(FontWeight.Bold)
.borderRadius(15)
.padding(8)
.backgroundColor(Color.Blue)
.onClick(() => {
this.debounce(this.setFinalInput, 3000);
})
}
}
debounce(fn: Function, wait: number = 300) {
if(this.timeout !== -1){
clearTimeout(this.timeout);
}
this.timeout = setTimeout(fn.bind(this), wait);
console.log("zd--- ==timeout==",this.timeout);
}
setFinalInput() {
console.log("zd--- setFinalInput this", JSON.stringify(this));
// this.finalSearchInput = this.searchInput;
}
}
2、实现截流可参考一下demo：
@Entry
@Component
struct ListPage {
@State pageNumber:number = 1
@State running:boolean = false
@State list:number[] = []
aboutToAppear(): void {
for (let i = 1; i <= 8; i++) {
this.list.push(i);
}
}
getData(){
let number = this.list.length + 1
for (let i = number; i <= 8*this.pageNumber; i++) {
this.list.push(i);
}
this.running = false
console.log(this.list.length.toString())
}
@Builder
ListItemBuilder(item:number){
Row(){
Text(item.toString())
}
.width('100%')
.padding(50)
.backgroundColor(Color.Pink)
}
build() {
Column() {
List({space:10}){
ForEach(this.list,(item:number)=>{
this.ListItemBuilder(item)
},(item:number)=>JSON.stringify(item))
}
.padding(20)
.edgeEffect(EdgeEffect.Spring)
.onReachEnd(()=>{
if (!this.running) {
this.running = true
this.pageNumber++
setTimeout(() => {
this.getData()
}, 2000)
}
})
}
.width('100%')
.height('100%')
.alignItems(HorizontalAlign.Center)
}
}
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