首先感谢王红元老师的vue课程，从中受益良多。特别是在目录结构的划分、组件封装思想上受到了很大启发，下面为大家带来一个tabBar的组件封装。

一、创建一个存放公共组件的文件夹，里面再新建一个tabbar的文件夹。里面创建两个.vue文件：TabBar.vue和TabBarItem.vue 如图：

1、TabBar.vue代码展示：

<template>   <div class="tab-bar">     <slot></slot>   </div> </template> <script>   export default {     name: "TabBar"   } </script> <style scoped>   .tab-bar{     width:100%;     height: 49px;     position: fixed;     bottom: 0;     left: 0;     z-index: 500;     display: flex;     justify-content: space-around;     background-color: white;     border-top: 1px solid #f3f3f3   } </style>  

2、TabBarItem.vue代码展示：

<template>   <div class="tab-bar-item" :style="{color: defaultColor}" @click="itemBind">     <div v-if="!isActive">       <slot name="item-icon"></slot>     </div>     <div v-else>       <slot name="item-icon-active"></slot>     </div>     <div :style="activeStyle">       <slot name="item-text"></slot>     </div>   </div> </template>  <script>   export default {     name: "TabBarItem",     computed:{       isActive(){ //激活当前路由对应的tab项样式         return this.$route.path.indexOf(this.path) != -1       },       activeStyle(){         return this.isActive?{color:this.activeColor}:{}       }     },     props:{       path:{         type:String,         default:'/'       },       activeColor: {         type:String,         default: '#f96702'       },       defaultColor:{         type: String,         default: '#666'       }     },     methods:{       itemBind(){ //点击tabBar项跳转对应的路由         if(!this.isActive){           this.$router.replace(this.path)         }       }     }   } </script> <style scoped>   .tab-bar-item{     position: relative;     display: flex;     flex-direction: column;     justify-content: center;     align-items: center;     font-size: 13px   }   .tab-bar-item img{     display: block;     width: 25px;     height: 25px;     margin-bottom: 2px;   } </style>  

二、创建一个MainTabBar.vue文件，用于导入上述组件，以及配置tabBar相关参数。代码展示：

<template>   <tab-bar v-if="isShowTabbar">     <tab-bar-item       v-for="item in tabBarArr"       :path="item.path"       :activeColor="activeColor"       :defaultColor="defaultColor"     >       <template v-slot:item-icon>         <img :src="item.defaultIcon">       </template>       <template v-slot:item-icon-active>         <img :src="item.activeIcon">       </template>       <template v-slot:item-text>         <div>{{item.name}}</div>       </template>     </tab-bar-item>   </tab-bar> </template> <script>   import TabBar from 'components/common/tabbar/TabBar'   import TabBarItem from 'components/common/tabbar/TabBarItem'   export default {     name: "MainTabBar",     components:{       TabBar,TabBarItem     },     data(){       return{         activeColor:'#008cd6', //选中色         defaultColor:'#8a8a8a', //默认色         tabBarArr:[           {             path:'/storelist',             name:'加油闪付',             defaultIcon:require('assets/img/tabbar/flashPay.png'),             activeIcon:require('assets/img/tabbar/flashPayChoosed.png')           },           {             path:'/equity',             name:'车主权益',             defaultIcon:require('assets/img/tabbar/equity.png'),             activeIcon:require('assets/img/tabbar/equityChoosed.png')           },           {             path:'/gasstation',             name:'油站导航',             defaultIcon:require('assets/img/tabbar/navigation.png'),             activeIcon:require('assets/img/tabbar/navigationChoosed.png')           },           {             path:'/profile',             name:'个人中心',             defaultIcon:require('assets/img/tabbar/customerCenter.png'),             activeIcon:require('assets/img/tabbar/customerCenterChoosed.png')           }         ]       }     },     computed:{       // 控制非tab页隐藏tab导航       isShowTabbar(){         return this.tabBarArr.map(val=>{return val['path']}).includes(this.$route.path)       }     }   } </script>  

三、导入组件
在App.vue文件中导入MainTabBar.vue组件;
然后调用即可;
至此tabBar的底部导航组件封装完成;

达到的功能：可配置默认色、激活色、图标、路由。