vant-ui框架的一个bug(解决切换后onload不触发)

# 安装 babel-plugin-import 插件
npm i babel-plugin-import -D
// .babelrc 中配置
// 注意：webpack 1 无需设置 libraryDirectory
{
 "plugins": [
 ["import", {
  "libraryName": "vant",
  "libraryDirectory": "es",
  "style": true
 }]
 ]
}
 
// 对于使用 babel7 的用户，可以在 babel.config.js 中配置
module.exports = {
 plugins: [
 ['import', {
  libraryName: 'vant',
  libraryDirectory: 'es',
  style: true
 }, 'vant']
 ]
};

import Vue from 'vue';
import Vant from 'vant';
import 'vant/lib/index.css'; 
Vue.use(Vant);

  <van-list
   v-model="loading"
   :finished="finished"
   @load="onLoad">
   <v-bookOrder 
    :list="list" 
    :type="type" 
    :idType="idType"
    @reflush = "submitHandler">
   </v-bookOrder>
  </van-list>
  <!-- //空页面 -->
  <div class="empty" v-if="list.length==0&&!loading">
   <img src="../../assets/icon_kong_dingdan@2x.png"/>
   <div>暂无预约～</div>
  </div>

initialization(){
   this.list = [];
   this.page = 1;
   this.loading = true;//下拉加载中
   this.finished = false;//下拉结束
   if(this.loading){
    this.onLoad();
   }
  },

onLoad() {
   setTimeout(async () => {
    let res = await this.$ajax.get({
     limit:this.pageSize,
     page:this.page,
     keyword:this.value1
    },'/order/businesslist/'+this.type,
    res=>{
     if(res.code==0){
      this.list = this.list.concat(res.data.list)
      this.loading = false;
      if(this.list.length >= res.data.total){
       this.finished = true;
      }
      this.page++;
     }
    else{
     this.$dialog.toast({
      mes: res.msg,
      timeout: 1500
     });
    }},err=>{
     this.$dialog.toast({
      mes: "出错了~",
      timeout: 1500
     });
    })  
   }, 500);
  },