vue-element-admin 跳转详情页，添加面包屑，侧边栏不显示

效果图： 侧边栏无显示，添加面包屑

// router.js  路由
 {
    path: '/logistics',
    component: Layout,
    redirect: '/logistics',
    name: 'logistics',
    meta: { title: '物流配送', icon: 'el-icon-s-help' },
    children: [
      {
        path: 'sender',
        name: 'sender',
        component: () => import('@/views/logistics/sender'),
        meta: { title: '发件人管理', icon: '' }
      },
      {
        path: 'senderModify',
        name: 'senderModify',
        component: () => import('@/views/logistics/senderModify'),
        hidden: true, // 侧边栏不显示  // activeMenu，百度说加上就能自动挂载在页面下，但是没用
        meta: { title: '发件人修改', icon: '', activeMenu: '@/views/logistics/sender' }
      },
    ]
}

// breadcrumb 面包屑组件
 methods: {
   getBreadcrumb() {
     // only show routes with meta.title
     let matched = this.$route.matched.filter(item => item.meta && item.meta.title)
     const first = matched[0]

     if (!this.isDashboard(first)) {
       // 默认带的
       matched = [{ path: '/dashboard', meta: { title: '首页' }}].concat(matched)
		// 我添加的
       if (first.instances.default.$root._route.name === 'senderModify') {
       	 // 在倒数第二插入
         matched.splice(2, 0, { path: '/logistics/sender', meta: { title: '发件人管理' }})
       }
     }

     this.levelList = matched.filter(item => item.meta && item.meta.title && item.meta.breadcrumb !== false)
   },
 }

// 跳转
this.$router.push({ path: '/logistics/senderModify' })