注意事项：

           1、路由层级要清楚

            2、每个路由要有title

路由配置文件：

{
    path: '/',
    component: RouteView,
    meta: { title: '首页', keepAlive: true, icon: 'search' },
    children: [
    // 消息中心
    {
      path: '/messageCenter',
      name: 'messageCenter',
      meta: { title: '消息中心' },
      component: () => import('@/views/index/messageCenter')
    },
}

<template>
  <a-breadcrumb class="breadcrumb">
    <a-breadcrumb-item v-for="(item, index) in breadList" :key="item.name">
      <router-link
        v-if="item.name != name && index != 1"
        :to="{ path: item.path === '' ? '/' : item.path }"
      >{{ item.meta.title }}</router-link>
      <span v-else>{{ item.meta.title }}</span>
    </a-breadcrumb-item>
  </a-breadcrumb>
</template>

<script>
export default {
  data () {
    return {
      name: '',
      breadList: []
    }
  },
  created () {
    this.getBreadcrumb()
  },
  methods: {
    getBreadcrumb () {
      this.breadList = []
      this.name = this.$route.name
      this.$route.matched.forEach(item => {
        this.breadList.push(item)
      })
    }
  },
  watch: {
    $route () {
      this.getBreadcrumb()
    }
  }
}
</script>

进入到消息模块，面包屑显示为： 首页 > 消息中心

如有问题，欢迎交流~~！