如图：列表是写在父组件中，input框和按钮是写在子组件中的 

按照以上示例图有这两个文件

父组件中：AboutView.vue

<template>
  <div class="about">
    <!-- <h1>This is an about page</h1> -->
    <!-- <ul v-for="(item,index) in arr" :key="index">
      <li :class="index%2==0?'box':''">{{item}}</li>
     
    </ul>
    <hr> -->
    <ul>
    <li v-for="(item,index) in arr" :key="index">
      <span v-color="index">{{item}}</span>
      <button @click="shanchu(index)">删除</button>
    </li>
    </ul>
<!-- 组件之间进行添加 -->
		<HelloWorld @fuzujian ="name">
      
    </HelloWorld>
  </div>
</template>
<script>
import HelloWorld from '@/components/HelloWorld.vue'

export default {
  components: {
    HelloWorld
  },
  data() {
    
    return {
    
      
      arr:[11,22,33,44,55,66],
    
    }
   
  },
   directives:{
    color(el,binding){
      if(binding.value%2 == 0){
        el.style.color = 'red';
      }else{
        el.style.color = 'green';
      }
      el.addEventListener('mouseenter',()=>{
        el.style.color = 'yellow';
      })
      el.addEventListener('mouseleave',()=>{
        if(binding.value%2 == 0){
        el.style.color = 'red';
      }else{
        el.style.color = 'green';
      }
      })
    }
   } ,
   methods: {

   // 组件之间进行添加
    name(a){
// console.log(a);
this.arr.push(a)
    },
    shanchu(index){
      if (confirm("确定要删除吗") == true) {
        this.arr.splice(index,1)
      } else {
        return false;
      }
     
    }
  
  }    
}
</script>
<style scoped>
ul li{
  list-style: none;
}
.box{
  color: red;
}
</style>

 子组件中components下的HelloWorld.vue

<template>
  <div class="hello">
    
    <ul>
      <li v-for="(item,index) in arrList" :key="index">
        {{item}}
      </li>
    </ul>
    <input type="text" v-model="ipt1"><button @click="tianjia">添加</button>




  </div>
</template>

<script>
export default {
  data() {
    return {
      mag:'',
      ipt1:'',
      arrList:[]
    }
  },
  methods:{
  


    tianjia(){
      // 这个是没用组件之间的传参写的添加
      // this.arrList.push(this.ipt1);
  //  console.log(this.ipt1);
  // 这个是用组件之间的传参写的添加
  this.$emit('fuzujian',this.ipt1)
    },
  }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="less">
ul li{
  list-style: none;
}
</style>