一，不确定有几个tabbar ,可能有三个，可能有四个，或者更多...

二，图片，文字点击高亮

三，跳转页面

四， 配置路由

虽然这个功能很多ui框架都有，但是封装也是一个学习的过程。

界面效果

 

 

父组件

<template>
  <div id="app">
    <router-view></router-view>
    <tab></tab>
  </div>
</template>
<script>
import Tab from "./components/Tab";
export default {
  name: "App",
  components: {
    Tab,
  },
  data() {
    return {};
  },
  methods: {},
};
</script>
<style lang="less">
// #115FFB  #909090
@import "./assets/css/common.css";

</style>

子组件我用了三层，一层嵌套一层，耐心看哟，最主要学习插槽,父子组件传值

第一个子组件  (定义放置tabbar的大容器)

<template>
  <div class="tabbar">
    <slot></slot>
  </div>
</template>

<script>
export default {
  name: "TabBar",
};
</script>
<style lang="less">
.tabbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #fff;
  width: 100%;
  height: 45px;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  text-align: center;
}
</style>

第二个子组件(tabbar 中的图片，文字的动态显示)

<template>
  <!-- 这里就相当于 每一个 -->
  <div class="tabbar-item" @click="getPath">
    <!-- 未选中图片 -->
    <div class="tabbar_icon" v-show="!isShow">
      <slot name="icon"> </slot>
    </div>
    <!-- 选中图片 -->
    <div class="tabbar_icon_active" v-show="isShow">
      <slot name="iconactive"></slot>
    </div>
    <!-- 文字 -->
    <div class="tabbar_title" :style="active">
      <slot name="title"></slot>
    </div>
  </div>
</template>

<script>
export default {
  name: "TabBarItem",
  // 父向子传
  props: {
    // 跳转路径
    path: {
      type: String,
    },
    // 高亮文字颜色
    activecolor: {
      tyep: String,
    },
  },
  // 计算属性
  computed: {
    // 如果要检索的字符串值没有出现，则该方法返回 -1。 不等于-1表示出现
    isShow() {
      return this.$route.path.indexOf(this.path) != -1;
    },
    active() {
      return this.isShow ? { color: this.activecolor } : "";
    },
  },
  methods: {
    getPath() {
      this.$router.push(this.path); // 跳转页面
      //console.log(this.path); 父向子传值
      //console.log(this.$route.path); vue 获取路径
    },
  },
};
</script>
<style lang="less">
.tabbar-item {
  flex: 1;
  height: 100%;
}
.tabbar_title {
  font-size: 14px;
  color: #909090;
}
</style>

第三个子组件(组合tabbar,可以任意放置三个，四个，或更多)

<template>
  <div class="tab">
    <tab-bar>
      <tab-bar-item path="/home" activecolor="#115FFB">
        <img slot="icon" src="../assets/img/home.png" alt="" />
        <img slot="iconactive" src="../assets/img/home_active.png" alt="" />
        <span slot="title">
          首页
        </span>
      </tab-bar-item>
      <tab-bar-item path="/subject" activecolor="#115FFB">
        <img slot="icon" src="../assets/img/subject.png" alt="" />
        <img slot="iconactive" src="../assets/img/subject_active.png" alt="" />
        <span slot="title">
          视频
        </span>
      </tab-bar-item>
      <tab-bar-item path="/profile" activecolor="#115FFB">
        <img slot="icon" src="../assets/img/profile.png" alt="" />
        <img slot="iconactive" src="../assets/img/profile_active.png" alt="" />
        <span slot="title">
          我
        </span>
      </tab-bar-item>
    </tab-bar>
  </div>
</template>

<script>
import TabBar from "../components/TabBar";
import TabBarItem from "../components/TabBarItem";
export default {
  name: "Tab",
  components: {
    TabBar,
    TabBarItem,
  },
  data() {
    return {};
  },
  created() {},
  methods: {},
};
</script>
<style lang="less"></style>

配置router

const routes = [
  {
    path: "/home",
    name: "home",
    component: home,
  },
  {
    path: "/subject",
    name: "subject",
    component: () => import("../views/subject.vue"),
  },
  {
    path: "/profile",
    name: "profile",
    component: () => import("../views/profile.vue"),
  },
];