vue-admin-template 404跳转问题

解决设置动态路由后的404跳转的问题
在src下的permission.js中的router.addRoutes(accessRoutes)后面加上404路由代码（最后两行），如下

router.beforeEach(async(to, from, next) => {
  // start progress bar
  NProgress.start()

  // determine whether the user has logged in
  const hasToken = getToken()

  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      NProgress.done()
    } else {
      // determine whether the user has obtained his permission roles through getInfo
      const hasRoles = store.getters.roles && store.getters.roles.length > 0
      if (hasRoles) {
        next()
      } else {
        try {
          // get user info
          // note: roles must be a object array! such as: ['admin'] or ,['developer','editor']
          const { roles } = await store.dispatch('GetInfo')

          // generate accessible routes map based on roles
          const accessRoutes = await store.dispatch('permission/generateRoutes', roles)

          // dynamically add accessible routes
          router.addRoutes(accessRoutes)
          let lastRou = [{ path: '*', redirect: '/404', hidden: true }]
          router.addRoutes(lastRou)