【Vue2.0】— 全局事件总线GlobalEventBus（十九）

import Vue from 'vue'
import App from './App.vue'
Vue.config.productionTip = false
//创建vm
new Vue({
    el: '#app',
    render: h => h(App),
    beforeCreate() {
        //安装全局事件总线
        Vue.prototype.$bus = this
    }
})

<template>
  <div class="demo">
    <h2>学校名称：{{schoolName}}</h2>
    <h2>学校地址：{{address}}</h2>
  </div>
</template>
<script>
  export default {
    name: 'School',
    data() {
      return {
        schoolName: '二中',
        address: '上海'
      }
    },
    mounted() {
      this.$bus.$on('hello', (data) => {
        console.log('我是School组件收到了数据', data);
      })
    },
    //解绑当前组件所用的事件
    beforeDestroy() {
      this.$bus.$off('hello')
    }
  }
</script>
<style scoped>
  .demo {
    background-color: pink;
  }
</style>

<template>
  <div class="demo">
    <h2>学生姓名：{{name}}</h2>
    <h2>学生年龄：{{age}}</h2>
    <button @click="sendStudentname">把学生名给School组件</button>
  </div>
</template>
<script>
  export default {
    name: 'Student',
    data() {
      return {
        name: '张三',
        age: 19
      }
    },
    methods: {
      sendStudentname() {
        this.$bus.$emit('hello', 666)
      }
    },
  }
</script>
<style>
  .demo {
    background-color: skyblue;
  }
</style>