Vue封装一个Tabbar组件 带组件路由跳转方式

<template>
  <div id="app">
    <router-view />
    //引入子组件 把items 这个数组传进去
    <Tabr :items="items" />
  </div>
</template>

<script>
import Tabr from "./components/Tabr";
export default {
  components: {
    Tabr,
  },
  data() {
    return {
      items: [
        {
          title: "首页",
          path: "/",
          img: require("./assets/img/shouye.png"),
          imgs: require("./assets/img/shouye_1.png"),
        },
        {
          title: "分类",
          path: "/About",
          img: require("./assets/img/fenlei.png"),
          imgs: require("./assets/img/fenlei_1.png"),
        },
        {
          title: "购物车",
          path: "/Cart",
          img: require("./assets/img/gouwuchezhengpin.png"),
          imgs: require("./assets/img/gouwuchezhengpin_1.png"),
        },
        {
          title: "我的",
          path: "/Mime",
          img: require("./assets/img/wode.png"),
          imgs: require("./assets/img/wode_1.png"),
        },
      ],
    };
  },
};
</script>

<template>
  <div class="Yanxuan_tab">
    <div v-for="(item,index) in items" :key="index" @click="Onclick(index)">
      <div>
        <img :src="index===Tabindex?item.imgs:item.img" alt  />
        //动态绑定
      </div>
      <div :class="index===Tabindex?'title':'Yanxuan_title'">
      //
      {{item.title}}</div>
    </div>
  </div>
</template>

<script>
export default {
  props: {
    items: {
      type: Array,
      required: true,
      validator: function (value) {
        return value.length <= 6;
        //市面常见的Tabbar的栏 不能超过6个
      },
    }
  },
  data() {
      return {
          item:this.items,
          Tabindex:0
      }
  },
  methods:{
     Onclick(index){
     //这里是根据下标切换 图片样式跟字体颜色 动态绑定
       this.Tabindex = index
       var temp = this.item[index]
      this.$router.push(temp.path)
     }
  }
};
</script>

<style scoped>
.Yanxuan_tab {
  width: 100%;
  height: 64px;
  border: 1px solid gainsboro;
  position: fixed;
  bottom: 0px;
  left: 0px;
  display: inline-flex;
  justify-content: space-around;
  align-items: center;
  text-align: center;
 
}
.Yanxuan_title{
     font-size: 14px;
}
.title{
    font-size: 14px;
    color:red
}
</style>

import Vue from 'vue'
import VueRouter from 'vue-router'
import Home from '../views/Home.vue'
Vue.use(VueRouter)
  const routes = [
  {
    path: '/',
    name: 'Home',
    component: Home,
    meta:{
      isShowTabbar:true
    }
  },
  {
    path: '/about',
    name: 'About',
    // route level code-splitting
    // this generates a separate chunk (about.[hash].js) for this route
    // which is lazy-loaded when the route is visited.
    component: () => import(/* webpackChunkName: "about" */ '../views/About.vue'),
    meta:{
      isShowTabbar:true
    }
  }
  ,
  {
    path: '/Cart',
    name: 'Cart',
    // route level code-splitting
    // this generates a separate chunk (about.[hash].js) for this route
    // which is lazy-loaded when the route is visited.
    component: () => import(/* webpackChunkName: "about" */ '../views/Cart.vue'),
    meta:{
      isShowTabbar:false
    }
  },
  {
    path: '/Mime',
    name: 'Mime',
    // route level code-splitting
    // this generates a separate chunk (about.[hash].js) for this route
    // which is lazy-loaded when the route is visited.
    component: () => import(/* webpackChunkName: "about" */ '../views/Mime.vue'),
    meta:{
      isShowTabbar:true
    }
  },
]
const router = new VueRouter({
  mode: 'history',
  base: process.env.BASE_URL,
  routes
})
export default router

<template>
  <div class="tab-bar-item" @click="itemClick">
    <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>
 
<!--
    上方代码设置三个插槽，为什么不是两个呢，因为还要包含当item处于活跃状态时要显示的image，所以是三个，使用v-if控制当非活跃时显示默认icon插槽，活跃时显示亮色icon插槽。因为插槽是要被传入其中的内容覆盖的，所以传入的内容可能会将我们slot中的一些属性覆盖掉，所以常常我们需要将slot包裹在div中，这样就可以避免这个问题。
    icon下方文同理也放在div中，style绑定一个计算属性，看下方代码可以这个计算属性当item处于活跃时会返回颜色属性，当然这个属性也是可以在调用tab-bar时传入的，默认为红色。
-->

<script>
  export default {
    name:'TabBarItem',
    props:{
      path: String,  // 当前item对应的路由，由调用者指定
      activeColor:{  // 当前item的文字在活跃时的颜色，默认红色，可由使用者指定
        type:String,
        default:"red"
      }
    },
    data() {
      return {
        // isActive:false,
      }
    },
    computed:{
      // 判断当前item是否处于活跃状态
      isActive(){
        return this.$route.path.indexOf(this.path)!==-1;
      },
      // 计算属性,如果处于活跃状态则设置style，否则去除style
      activeStyle(){
        return this.isActive? {color:this.activeColor}:{};
      }
    },
    methods:{
      itemClick(){
        if(this.$route.path!==this.path){
          this.$router.push(this.path);
          // this.isActive = true;
        } 
      }
    }
  }
</script>

<style scoped>
<!--一些默认样式-->
  .tab-bar-item {
    flex: 1;
    text-align: center;
    height: 49px;
    font-size: 10px;
  }
  .tab-bar-item img {
    margin-top: 4px;
    width: 22px;
    height: 22px;
    vertical-align: middle;
    margin-bottom: 2px;
  }
</style>

<template>
  <div id="tab-bar">
    <slot></slot>
  </div>
</template>

<script>
export default {
  name: "TabBar"
};
</script>

<style scoped>
#tab-bar {
  display: flex;
  background-color: #f6f6f6;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  box-shadow: 0px -2px 1px rgba(100, 100, 100, 0.1);
}
 
</style>

<template>
  <tab-bar>
      <tab-bar-item path="/home" activeColor="deepPink">
        <img slot="item-icon" src="~assets/img/tabbar/home.svg" alt="">
        <img slot="item-icon-active" src="~assets/img/tabbar/home_active.svg" alt="">
        <div slot="item-text">首页</div>
      </tab-bar-item>
      <tab-bar-item path="/category" activeColor="deepPink">
        <img slot="item-icon" src="~assets/img/tabbar/category.svg" alt="">
        <img slot="item-icon-active" src="~assets/img/tabbar/category_active.svg" alt="">
        <div slot="item-text">分类</div>
      </tab-bar-item>
      <tab-bar-item path="/cart" activeColor="deepPink">
        <img slot="item-icon" src="~assets/img/tabbar/cart.svg" alt="">
        <img slot="item-icon-active" src="~assets/img/tabbar/cart_active.svg" alt="">
        <div slot="item-text">购物车</div>
      </tab-bar-item>
      <tab-bar-item path="/profile" activeColor="deepPink">
        <img slot="item-icon" src="~assets/img/tabbar/profile.svg" alt="">
        <img slot="item-icon-active" src="~assets/img/tabbar/profile_active.svg" alt="">
        <div slot="item-text">我的</div>
      </tab-bar-item>
    </tab-bar>
  
</template>

<script>
  import TabBar from "components/tabbar/TabBar";
  import TabBarItem from "components/tabbar/TabBarItem";
  export default {
    name:'MainTabBar',
    components:{
      TabBar,
      TabBarItem
    }
  }
</script>

<style scoped>
</style>