创建promose.js文件

import Promise from './es6-promise.min';
export const request = (method = 'GET') => (url, data) => {
  return new Promise((resolve, reject) => {
    wx.request({
      url,
      data,
      method,
      header: {
        'Content-Type': 'application/json'
      },
      success: function (res) {
        resolve(res.data)
      },
      fail: function (err) {
        reject(err)
      }
    });
  })
}
const get = request('GET');
const post = request('POST');
const put = request('PUT');
const del = request('DELETE');
module.exports = {
  get,
  post,
  put,
  del
}

创建api.js来存放api

import api from './promise.js'
export const getApp = ids => {
  return api.get('https://example.com/sns/jscode2session',ids).then();
};

在index.js中使用定义好的api

import {
    getApp
} from '../../utils/api';
const app = getApp()
Page({
    data: {
    },
    bindViewTap: function() {
        let ids='abc'
        getApp(ids).then(res => {
            console.log(res.data)
        })
    },
})