Vue - 消息订阅与发布

一种组件间通信方式，适用于任意组件间通信。

使用步骤

1.安装pubsub: npm i pubsub-js
2.引入：import pubsub from 'pubsub-js'
3.接收数据：A组件想接收数据，则在A组件中订阅消息，订阅的回调留在A组件自身。pubsub.subscribe('xxx',回调函数)

<template>
  <div>
    <h2>{{receiveName}}</h2>
  </div>
</template>

<script>
import pubsub from 'pubsub-js'
export default {
  name: "School",
  data(){
    return{
      receiveName:""
    }
  },
  mounted() {
    this.pid = pubsub.subscribe("receiver",(msgName,data) =>{
      console.log(msgName+"订阅成功！");
      this.receiveName = data;
    })
  }
}
</script>

4.提供数据：pubsub.publish('xxx',数据)

<template>
  <div>
    <button @click="send">发送订阅</button>
  </div>
</template>

<script>
import pubsub from 'pubsub-js'
export default {
  name: "Student",
  data(){
    return{
      name:"张三"
    }
  },
  methods:{
    send(){
      pubsub.publish('receiver',this.name);
    }
  }
}
</script>

5.最好在beforeDestory钩子中，用pubsub.unsubscribe(pid)取消订阅。