这是一个简单的封装，做下记录。代码有做解释
新建请求类
http.js

var Http = {
  baseUrl: '',//请求的基础地址：www.baidu.com/
  headers: {//具体配置看个人需求
    // authorization: '',
    // pid: '',
    // appid: '',
    // 'X-ClientId': '',
    // From: 'Platform',
  },

  /**
   * [HTTP 请求]
   * 
   */
  request: function (option) {
    const { url, method, data, params } = option;
    let newPath = url;
    //如果是post请求且params存在 则将params拼接于请求地址后面
    if (method.toLocaleUpperCase() == 'POST' && params) {
      let str = '';
      Object.keys(params).forEach((key, index) => {
        if (index === 0) {
          str += `?${key}=${params[key]}`;
        } else {
          str += `&${key}=${params[key]}`;
        }
      });
      newPath += str;
    }
    //具体实现
    return Http.Request(method.toLocaleUpperCase(), {
      url: newPath,
      params: data || params || {},
    });
  },
  // request
  Request: function (method, requestHandler) {
    //loading:true;false
    //mask:是否显示透明蒙层，防止触摸穿透
    const { url, params, headers, mask, loading } = requestHandler;
    let url_ = '';
    if (!url.startsWith('http')) {
      url_ = `${this.baseUrl}${url}`;
    } else {
      url_ = url;
    }
    //是否请求加Loading....
    if (loading) {
      // wx.showLoading && wx.showLoading({
      //   title: 'Loading...',
      //   mask: mask ? mask : false
      // })
    }
    return new Promise((resolve, reject) => {
      wx.request({
        url: url_,
        data: params,
        method: ['GET', 'POST', 'PATCH', 'PUT', 'DELETE'].indexOf(method) > -1 ? method : 'GET',
        header: Object.assign(this.headers, headers),
        success: function (res) {
          const { data, statusCode } = res;
          // 处理数据:根据接口的放回状态码去确定：例如下面
          if (statusCode === 200 || statusCode === 204) {//成功
            resolve(data);
          } else {//失败处理：最后把加reject；不然在接口调用的地方，无法拦截做一些其他事情
            if (statusCode === 400) {
              wx.showToast({
                title: '参数有误',
                icon: 'error',
              });
            } else if (statusCode === 401) {
              console.log('没登陆；或者登陆过期');
            } else if (statusCode === 403) {
              wx.showModal({
                title: '温馨提示',
                content: data.error.message,
                showCancel: false,
              });
            } else if (statusCode === 500) {
              wx.showToast({
                title: '系统错误',
                icon: 'error',
              });
            }
            reject(data, statusCode);
          }
        },
        fail: function () {
          reject('Network request failed');
        },
        complete: function () {
          console.log('接口调用完成，关闭弹窗：wx.hideLoading');
        },
      });
    });
  },
};
//导出
module.exports = Http;

使用:伪代码

const http = require('../../utils/http');
const request = http.request;
class testApi {
    //post
    static post_method(data) {
        return request({
            url: `/platform/api/Account/resetPassword`,
            method: 'post',
            data: data,
        });
    }
    static post_method1(params,data) {
        return request({
            url: `/platform/api/Account/resetPassword`,
            method: 'post',
            data: data,
            params:params,
        });
    }
    static post_method2(params) {
        return request({
            url: `/platform/api/Account/resetPassword`,
            method: 'post',
            params:params,
        });
    }
        static get_method(params) {
            return request({
                url: `/platform/api/Account/resetPassword`,
                method: 'get',
                params:params
            });
        }
        //detele
        static del(params){
            return request({
              url: `/mg/api/Announce/del`,
              method: 'delete',
              params: params,
            });
          }
}