Vue组件之间的通信你知道多少

//这是父组件,Father.vue
<template>
  <div class="father">
    <!-- 父组件向子组件传递person对象 -->
    <Son :person="person"/>
  </div>
</template>
<script>
export default {
    data (){
        return {
            person:{name:'张三',age:18,sex:'男'}
        }
    }
}
</script>

//这是子组件,Son.vue
<template>
  <div class="son">
      <h2>我是子组件</h2>
      <div>
        <h4>个人信息展示</h4>
		<ul>
            <li><label>姓名:</label><span>{{person.name}}</span></li>
            <li><label>年龄:</label><span>{{person.age}}</span></li>
            <li><label>性别:</label><span>{{person.sex}}</span></li>
        </ul>
      </div>
  </div>
</template>
<script>
export default {
  //子组件通过props接收父组件传递过来的数据
  props:['person']
}
</script>

//父组件 父组件传递了 company-name
<Son company-name = "Microsoft"></Son>
//子组件 子组件接收时的写法
<script>
export default {
    props:['companyName']
}
</script>

props:['name','age','sex']

props:{
    name:{
        type:String,
        required:true,
        default:''
    },
    age:{
        type:Number,
        required:true,
        default:0
    },
    sex:String
}

<Son :categoryList="categoryList"></Son>
<script>
export default {
	data (){
        return {
            //购物车列表数据
            categoryList:[]
        }
    }        
}
</script>

//子组件 Son.vue
<template>
  <div class="son">
    <button @click="sendMsgForFather">发送信息</button>
  </div>
</template>
<script>
export default {
  props:['getSonMessage'],
  methods:{
    sendMsgForFather(){
      this.getSonMessage(`我是子组件,你好啊`)
    }
  }
}
</script>

//父组件 Father.vue
<template>
  <div class="father">
    <h1>我是父组件</h1>
    <Son :getSonMessage="getSonMessage"/>
  </div>
</template>
<script>
import Son from '@/components/Son.vue'
export default {
  components : {
    Son
  },
  methods:{
    getSonMessage(msg){
      console.log(`我收到了子组件传递过来的信息:${msg}`);
    }
  }
}
</script>

//子组件 Son.vue
<template>
  <div class="son">
    <button @click="sendMsgForFather">发送信息</button>
  </div>
</template>
<script>
export default {
  props:['getSonMessage'],
  methods:{
    //发送信息给父组件
    sendMsgForFather(){
      this.$emit('eventN',`我是子组件,hello`)
    }
  }
}
</script>

//父组件 Father.vue
<template>
  <div class="father">
    <h1>我是父组件</h1>
    <Son @eventN="demo"/>
  </div>
</template>
<script>
import Son from '@/components/Son.vue'
export default {
  components : {
    Son
  },
  methods:{
    demo(msg){
      console.log(`触发了demo函数,${msg}`);
    }
  }
}
</script>

//main.js中安装全局事件总线
new Vue({
  render: h => h(App),
  beforeCreate(){
    Vue.prototype.$bus = this //安装全局事件总线
  }
}).$mount('#app')

//消息发送方 SendCom.vue
<template>
  <div class="send-container">
    <!-- SendCom 向组件 GetMsg 发送信息，通过$emit触发自定义事件-->
    <button @click="sendMsg">发送消息</button>
  </div>
</template>
<script>
export default {
  methods:{
    sendMsg(){
      this.$bus.$emit('eventB','hello')
    }
  }
}
</script>

//消息接收方 GetMsg.vue
<template>
  <div class="get-msg-container">
  </div>
</template>
<script>
export default {
  mounted() {
    console.log(this);
    this.$bus.$on('eventB', (data) => {
      console.log(`我是事件接受方Demo2,我收到了数据${data}`);
    });
  },
  beforeDestroy() {
    this.$bus.$off('eventB') //在使用完后将事件解绑
  }
};
</script>

//消息订阅者(接收方) Subscribe.vue
<template>
  <div class="subscribe">
  </div>
</template>
<script>
import pubsub from 'pubsub-js'
export default {
    mounted(){
        this.pubId = pubsub.subscribe('message',(msgName,data)=>{
            console.log(`我收到了消息${msgName},内容是${data}`);
        })
    },
    beforeDestroy(){
        pubsub.unsubscribe(this.pubId)
    }
}
</script

//消息发布者(发送方) Publish.vue
<template>
  <div class="publish">
      <button @click="sendMsg">点击发送</button>
  </div>
</template>
<script>
import pubsub from 'pubsub-js'
export default {
    methods:{
        sendMsg(){
            pubsub.publish('message','这是订阅的消息')
        }
    }
}
</script>