vue中三级导航的菜单权限控制

把路由表的数据结构和后端沟通好，然后后端把对应权限的路由树给前端返回，前端在vuex中处理处理路由

import Cookies from 'js-cookie'

import router from '@/router'

import userInfos from '@/api/login'
import date from '../modules/user'
const Layout = () =>
  import ('@/layout') // 全局组件

const _import = require('@/router/_import_' + process.env.NODE_ENV)
const state = {
  routers: sessionStorage.getItem('navRouters')
        ? sessionStorage.getItem('navRouters')
        : [],
  navRouters: sessionStorage.getItem('navRouters')
        ? sessionStorage.getItem('navRouters')
        : [],
}
const mutations = {
  // 菜单权限
  SET_ALL_MENU_LIST(state, menulist) {
    state.navRouters = menulist
    state.routers = menulist
  }
}

onst actions = {
  // 菜单获处理
  setAllMenuList({ commit }, userInfo) {
    /**
         * 初始化路由
         * @param router 路由文件，是一个数组
         */
    function initRouter(router) {
      for (let i = 0; i < router.length; i++) {
        const route = router[i]
        // 设置一级路由的控件为全局定义的默认控件
        route.component = Layout
        // 设置子路由
        route.children && initChildrenRouter(route.children)
      }
      return router
    }
    /**
         * 初始化子路由
         * @param router 子路由数组
         */
    function initChildrenRouter(router) {
      for (let i = 0; i < router.length; i++) {
        const route = router[i]
        // 初始化子路由的控件
        route.component && (route.component = _import(route.component))
        route.children &&
                    route.children.length &&
                    initChildrenRouter(route.children)
      }
    }
    return new Promise((resolve, reject) => {
      userInfos
        .postGetUserRoutes(date.state.userId)
        .then(response => {
          const { result, code } = response
          if (code === 200) {
            if (result.length) {
              result.forEach(v => {
                for (let i = 0; i < v.children[0].children.length; i++) {
                  if (!v.children[0].children[i].hidden === true) {
                    v.redirect =
                         v.path +
                           '/' +
                           v.children[0].path +
                           '/' +
                         v.children[0].children[i].path
                    break
                  }
                }
              })
            }
            const accessedRouters = initRouter(result)
            console.log('accessedRouters', accessedRouters)
            accessedRouters.push({
              path: '*',
              redirect: '/404',
              hidden: true
            })
            router.addRoutes(accessedRouters)
            sessionStorage.setItem(
              'navRouters',
              JSON.stringify(accessedRouters)
            )
            sessionStorage.setItem(
              'allMenuList',
              JSON.stringify(accessedRouters)
            )
            commit('SET_ALL_MENU_LIST', accessedRouters)
            resolve()
          } else {
            reject(response.data)
          }
        })
        .catch(error => {
          reject(error)
        })
    })
  }
}

为了防止刷新丢失，在路由守卫中要加一层条件

const hasGetUserInfo = store.getters.name
            if (hasGetUserInfo) {
                // 处理最新路由
                console.log('00', to)
                if (!isAddTrue) {
                    isAddTrue++
                    store.dispatch('app/setAllMenuList', '').then(() => {
                        console.log('00', to)
                        next({ path: to.path })
                    })
                } else {
                    next()
                }
            } else {
                try {
                    // get user info
                    await store.dispatch('user/getInfo')

                    next()
                } catch (error) {
                    // remove token and go to login page to re-login
                    await store.dispatch('user/resetToken')
                    Message.error(error || 'Has Error')
                    next(`/login?redirect=${to.path}`)
                    NProgress.done()
                }
            }
        }