已封装为组件，亲测4个菜单项目可以切换，

以下为示例，根据Storage 中 userType 的 值，判断权限菜单

<template><view class="tab-bar pb10"><view class="tabli" v-for="(tab, index) in tabs" :key="index" @click="switchTab(tab)"><image :src="currentTab === tab.text ? tab.selectedIconPath : tab.iconPath" mode="aspectFit"></image><text :class="currentTab === tab.text ? 'active' : ''">{{ tab.text }}</text></view><loginTourist ref="loginPop"></loginTourist></view>
</template>
<script>
export default {props: {//当前页currentTab: {type: String,required: true}},data() {return {// 游客、管理员、村民usertype: uni.getStorageSync('userType'),}},
computed: {// 权限菜单tabs() {if (this.usertype =='村民') {return [{"pagePath": "/pages/homepage/index","iconPath": this.img('home-1'),"selectedIconPath": this.img('home'),"text": "首页"},
{"pagePath": "/workPages/teach/index","iconPath": this.img('bs-1'),"selectedIconPath": this.img('bs'),"text": "办事指南"},{"pagePath": "/pages/messag/index","iconPath": this.img('mass-1'),"selectedIconPath": this.img('mass'),"text": "消息"},{"pagePath": "/pages/mine/index","iconPath": this.img('mine-1'),"selectedIconPath": this.img('mine'),"text": "我的"}],}else if (this.usertype =='管理员') {// 管理员return [{"pagePath": "/pages/homepage/index","iconPath": this.img('home-1'),"selectedIconPath": this.img('home'),"text": "首页"}, ],}}},
methods: {switchTab(tab) {// console.log("底部导航", tab)let userType = uni.getStorageSync('userType')||this.userTypelet token = uni.getStorageSync('token')console.log('底部导航,用户，token|',tab.text ,userType,token)uni.navigateTo({url: tab.pagePath});},// 统一加图片域名路径img(img) {return 图片网址前缀 + 'tabBar/' + img + '.png'},},</script>
<style>.tab-bar {justify-content: space-around;align-items: center;height: 150upx;position: fixed;left: 0;z-index: 99999999999999999999;width: 100%;display: flex;justify-content: space-around;background: rgb(240 242 245 / 97%);border-top: 0.5px solid rgba(240, 242, 245, 1)}.tab-bar .tabli {flex: 1;display: flex;flex-direction: column;align-items: center;
justify-content: center;}.tab-bar image {width: 25px;height: 25px;}.tab-bar text {font-size: 12px;margin-top: 5px;}.tab-bar text.active {font-weight: bold;}
</style>

声明为全局组件：main.js 中添加

import tzTabBar from "@/components/atz-tabbar/atz-tabbar.vue"//自定义底部菜单
Vue.component('tzTabBar', tzTabBar)

在页面中使用：

<tzTabBar :currentTab="'消息'"></tzTabBar>