vue動態路由實現多級嵌套面包屑的思路與方法

<router-link :to="{path:'/b/'+id,query:{breadNum:2}}"></router-link>

<router-link :to="{path:'/bbdetail/'+id,query:{breadNum:3}}"></router-link>

<template>
 <div class="breadbox">
 <span v-for="(item,index) in breadlist" >
 <router-link :to="item.path">{{item.name}}</router-link>
 </span>
 </div>
</template>
<script>
 export default{
 created() {
 this.getBreadcrumb();
 },
 data() {
 return {
 breadlist: '' // 路由集合
 }
 },
 methods: {
 getBreadcrumb() {
 var breadNumber= this.$route.query.breadNum || 1;//url變量breadNum記錄層級，默認為1，如果大于1，要添加上變量；
 var breadLength=this.$store.state.breadListState.length;//目前breadlist集合數組個數
 var curName=this.$route.name;
 var curPath=this.$route.fullPath;
 var newBread={name:curName,path:curPath};
 var ishome=curName=='首頁';
 console.log(ishome);
 if(breadNumber===1){//點擊一級菜單
 this.$store.commit('breadListStateRemove',1);//初始化，只有首頁面包屑按鈕
 if(!ishome)//如果不是首頁
 this.$store.commit('breadListStateAdd',newBread);//當前頁面添加到breadlist集合
 }
 else if(breadLength<=breadNumber){//如果不是一級導航，并且breadlist集合個數等于或者小于目前層級
 this.$store.commit('breadListStateAdd',newBread);//要把當前路由添加到breadlist集合
 }else{
 this.$store.commit('breadListStateRemove',parseInt(breadNumber)+1);//如果往回點面包屑導航，截取；
 }
 this.breadlist=this.$store.state.breadListState;
 console.log(this.breadlist);
 }
 },
 watch: {
 $route () {
 this.getBreadcrumb();
 }
 },
 }
</script>

export default store = new Vuex.Store({
 state: {
 breadListState:[
 {name:'首頁',path:'/'}
 ]
 },
 mutations: {
 breadListStateAdd(state,obj){
 state.breadListState.push(obj);
 },
 breadListStateRemove(state,num){
 state.breadListState=state.breadListState.slice(0,num);
 }
 }

})

{
 path: '/',
 name: '首頁',
 component: Main,
 redirect:'/home',
 children:[
 {path: '/a',name: 'A頁面',component: APage},
 {path: '/b/:id',name: 'B頁面',component: BPage},
 {path: '/bdetail/:id',name: 'C頁面',component: CPage},
 ]
}