Vux+Axios拦截器增加loading的问题及实现方法

axios.interceptors.request.use(
config => {
//请求拦截器，调用loading插件
// 显示loading
// 判断是否重复提交请求，也就是loading是否还存在，如果存在则不显示新的loading
let isShow = window.app.$vux.loading.isVisible()
if(!isShow&&config.showLoading){
  window.app.$vux.loading.show({
  text: 'Loading'
  })
}
config.data = JSON.stringify(config.data);
config.headers = {
  'Content-Type': 'application/json',
}
return config;
},
error => {
return Promise.reject(err);
}
);

<script src="https://unpkg.com/axios/dist/axios.min.js"></script>

import axios from 'axios';
let http = axios.create({
 baseURL: 'http://localhost:8080/',
 withCredentials: true,
 headers: {
  'Content-Type': 'application/x-www-form-urlencoded;charset=utf-8'
 },
 transformRequest: [function (data) {
  let newData = '';
  for (let k in data) {
   if (data.hasOwnProperty(k) === true) {
    newData += encodeURIComponent(k) + '=' + encodeURIComponent(data[k]) + '&';
   }
  }
  return newData;
 }]
});
function apiAxios(method, url, params, response) {
 http({
  method: method,
  url: url,
  data: method === 'POST' || method === 'PUT' ? params : null,
  params: method === 'GET' || method === 'DELETE' ? params : null,
 }).then(function (res) {
  response(res);
 }).catch(function (err) {
  response(err);
 })
}
export default {
 get: function (url, params, response) {
  return apiAxios('GET', url, params, response)
 },
 post: function (url, params, response) {
  return apiAxios('POST', url, params, response)
 },
 put: function (url, params, response) {
  return apiAxios('PUT', url, params, response)
 },
 delete: function (url, params, response) {
  return apiAxios('DELETE', url, params, response)
 }
}

import Api from './api/index.js';
Vue.prototype.$api = Api;

this.$api.post('user/login.do(地址)', {
  "参数名": "参数值"
}, response => {
   if (response.status >= 200 && response.status < 300) {
    console.log(response.data);\\请求成功，response为成功信息参数
   } else {
    console.log(response.message);\\请求失败，response为失败信息
   }
});