vue+vant 上传图片需要注意的地方

<van-uploader v-model="fileList" multiple :after-read="afterRead" :max-count="1" />

afterRead(file){
        console.log(file); //控制台可以看见图片信息
     if(this.fileList.length > 1){
         this.fileList.splice(1);
         this.$msg({
           text:'只能选择这么多!',
           type:'info'
         })
         return false;
       }
       let Files = this.Files;
       Files.push(file.file);
    },

//http request 拦截器
axios.interceptors.request.use((config) => {
  if (config.method === 'post') {
    if( config.data && !config.data.i ){
      config.headers['Content-Type'] = 'multipart/form-data';
    }else{
      config.data = Qs.stringify(config.data);
    }
    //  if ( config.data ){
    //       if ( config.data.i === undefined ){
    //         config.headers['Content-Type'] = 'multipart/form-data';
    //       }else{
    //         config.data = Qs.stringify(config.data);
      
    //       }
    //  }
  }
  return config;
}, (error) => {
  return Promise.reject(error);
})

WineOrder(){
      console.log(this.Files)
      this.disabled = true;
      const data = new FormData();
      const USER = JSON.parse(sessionStorage.getItem('USER'));
      data.append('i',USER.uniacid);
      data.append('token',USER.token);
      data.append('bid',USER.bid);
      data.append('roomid',this.roomid);
      data.append('booker',this.dingName);
      data.append('guestname',this.userName);
      data.append('type',this.type);
      data.append('tel',this.phone);
      data.append('endtime',this.date);
      data.append('file',this.Files[0]);
      data.append('goodsinfo',JSON.stringify(this.savewineList));
      WineOrder(data).then((e)=>{
        if( e.code == 0 ){
          this.disabled = false;
          e.totalmoney = '';
          var c ={
            Topic:"",
            data:e,
            type:'Savewine'
          }
          return;
          setTimeout(() => {
            window.location.href="setterOrder" rel="external nofollow" +JSON.stringify(c);
          }, 1500);
        }else{
           this.disabled = false;
           this.$msg({
            text:e.msg,
            type:'info'
          })
        }
      })
    },