小程序（使用triggerEvent实现）

【https://developers.weixin.qq.com/miniprogram/dev/framework/custom-component/events.html】

• 监听事件

<!-- 当自定义组件触发“myevent”事件时，调用“onMyEvent”方法 -->
<component-tag-name bindmyevent="onMyEvent" />
<!-- 或者可以写成 -->
<component-tag-name bind:myevent="onMyEvent" />

Page({onMyEvent(e) {e.detail // 自定义组件触发事件时提供的detail对象
  }
})

 

• 触发事件

自定义组件触发事件，需要使用 triggerEvent 方法，指定事件名、detail对象和事件选项：

<!-- 在自定义组件中 -->
<button bindtap="onTap">点击这个按钮将触发“myevent”事件</button>

Component({properties: {},methods: {onTap() {const myEventDetail = {} // detail对象，提供给事件监听函数const myEventOption = {} // 触发事件的选项this.triggerEvent('myevent', myEventDetail, myEventOption)}}
})

 

 Angular（使用EventEmitter实现）（父组件监听子组件的事件）

【https://angular.cn/guide/component-interaction】

import { Component, EventEmitter, Input, Output } from '@angular/core';@Component({selector: 'app-voter',template: `<h4>{{name}}</h4><button (click)="vote(true)"  [disabled]="didVote">Agree</button><button (click)="vote(false)" [disabled]="didVote">Disagree</button>
  `
})
export class VoterComponent {@Input()  name: string;@Output() voted = new EventEmitter<boolean>();didVote = false;vote(agreed: boolean) {this.voted.emit(agreed);
this.didVote = true;}
}

import { Component }      from '@angular/core';@Component({selector: 'app-vote-taker',template: `<h2>Should mankind colonize the Universe?</h2><h3>Agree: {{agreed}}, Disagree: {{disagreed}}</h3><app-voter *ngFor="let voter of voters"[name]="voter"(voted)="onVoted($event)"></app-voter>
  `
})
export class VoteTakerComponent {agreed = 0;disagreed = 0;voters = ['Mr. IQ', 'Ms. Universe', 'Bombasto'];onVoted(agreed: boolean) {agreed ? this.agreed++ : this.disagreed++;}
}

 

 

当然了，angular中还有其他办法实现组件通讯，比如使用服务等。