最近vue不是特别火，自己想写一个vue 的底部菜单栏，然后试着开始写，起来还是听痛苦的，但是还是写出来，这个过程重查询了一些资料和看了一些视频。

1 写好界面

这是我写好的四个界面

image.png

2 在router.js重定义路由

在一级路由下面定义自己tabbr的子路由。

routes: [
    {
      path: '/',
      name: 'index',
      component:()=>import('./views/index'), //懒加载引入，路由
      children:[
        {path:'',redirect:'/charts'},//重定项
        {path:'/charts',name:'charts',component:()=>import('./views/charts.vue')},
        {path:'/adiscover',name:'adiscover',component:()=>import('./views/adiscover.vue')},
        {path:'/ybutton',ybutton:'ybutton',component:()=>import('./views/ybutton.vue')},
        {path:'/me',name:'me',component:()=>import('./views/me.vue')}
      ]
    },
]

3 封装tabbar底部菜单栏 组件

<template>


<!-- <div class="footbar">
     <router-link to='/' tag='div'>
         <span>
           <img :src="this.$route.path=='/charts'?'https://ss0.baidu.com/6ONWsjip0QIZ8tyhnq/it/u=3100024767,29226190&fm=58':'https://ss0.baidu.com/6ONWsjip0QIZ8tyhnq/it/u=3993527673,913427098&fm=58'" alt="">
         </span>
          <span>资产</span>
     </router-link>
     <router-link to='/adiscover' tag='div'>
         <span>
            <img :src="this.$route.path=='/adiscover'?'https://10.url.cn/qqcourse_logo_ng/ajNVdqHZLLAcYPom22osQf2IIdMD25ofYUibd1USSQFHdiaUIiavicpAibgSReIqCky8gqY8ku5qdXsc/356':'https://ss0.baidu.com/6ONWsjip0QIZ8tyhnq/it/u=3993527673,913427098&fm=58'" alt="">
         </span>
         <span>商城</span>
     </router-link>
     <router-link to='/ybutton' tag='div'>
         <span>
            <img :src="this.$route.path=='/ybutton'?'https://10.url.cn/qqcourse_logo_ng/ajNVdqHZLLAcYPom22osQf2IIdMD25ofYUibd1USSQFHdiaUIiavicpAibgSReIqCky8gqY8ku5qdXsc/356':'https://ss0.baidu.com/6ONWsjip0QIZ8tyhnq/it/u=3993527673,913427098&fm=58'" alt="">
         </span>
         <span>交易</span>
     </router-link>
     <router-link to='/me' tag='div'>
         <span>
            <img :src="this.$route.path=='/me'?'https://10.url.cn/qqcourse_logo_ng/ajNVdqHZLLAcYPom22osQf2IIdMD25ofYUibd1USSQFHdiaUIiavicpAibgSReIqCky8gqY8ku5qdXsc/356':'https://ss0.baidu.com/6ONWsjip0QIZ8tyhnq/it/u=3993527673,913427098&fm=58'" alt="">
         </span>
         <span>我的</span>
     </router-link>
    </div> -->
<div class="footer">
        <router-link v-for="(item,index) in data" :key="index" :to="item.path">
            <div class="divs" @click="tab_click(item.path)">
                <i :class="item.icon==true?'red':'bloack'">1</i>
                <i>{{item.title}}</i>    
            </div>    
        </router-link>       
</div>
</template>
<script>
import { constants } from 'crypto';
export default {
    props:{
        data:Array
    },
    data(){
        return{ 
            datai:this.data
        }
    },
    created(){

    },
    mounted(){
        console.log(this.data)
    },
    methods:{
        tab_click(path){
            const that=this;
            let datary=this.data;

                for(let i=0;i<datary.length;i++){ 
                        datary[i].icon=false;
                    if(datary[i].path==path){ 
                        datary[i].icon=true;
                         console.log('---------',datary[i].path)
                    }
                }
       
            this.datai=datary;
            console.log(datary)
            
        }
    }
      
 
}
</script>
<style scoped>
.footer{
    position: fixed;
    bottom:0px;
    left:0px;
    width:100%;
    display:flex;
    justify-content:  space-between;

}

.footer .divs{padding:10px;}

.red{color:red;font-size:14px;}
.bloack{font-size:14px;color:black;}


/* ---------------- */

 .footbar{
    width: 100%;
    height: 2.613333rem;
    position: fixed;
    bottom: 0;
    display: flex;
    align-items: center;
    background: white;
    border-top: 1px solid #eeeeee;
    color: #999999;
}
.footbar span{
    display: block;
    font-size: .64rem;
}
.footbar div{
    flex: 1;
    text-align: center;
}
.footbar img{
    height: 1.066667rem;
}
.footbar .router-link-exact-active{
    color: #2F83C3;
}
.footbar .active{
    color: #2F83C3;
}

</style>

4 显示底部菜单栏的界面 引入tabbar 组件

<template>
    <div class="index">
        主页
        <router-view></router-view>




        <tabbar :data="tabbarData"/>
    </div>
</template>
<script>
import tabbar from '../components/tabbaer'
export default {
name:'index',
data() {
    return {
        tabbarData:[
            {title:'微信',icon:true,path:'/charts'},
            {title:'通讯录',icon:false,path:'/adiscover'},
            {title:'发现',icon:false,path:'/ybutton'},
            {title:'我的',icon:false,path:'/me'},
            ]
    }
},
components:{
    tabbar,
},
}
</script>
<style scoped>
    .index{
        width:100%;
        height:100%;
        overflow: hidden;
        padding:16px;
        box-sizing:border-box;
        }

       
</style>

5 这就是最终结果

image.png