一次微信小程序内地图的使用实战记录

前言   

今天在做新需求的时候发现个很尬的问题：我们项目的小程序是直接输入账号密码进行登录的，不是平常的获得用户授权登录的模式，所以当我使用wx.getLocation一直拉不下来授权一直进fail不去success的时候我开始慌了   

我以为是由于这个登录模式不同导致，然后我就开始疯狂骚扰我的小伙伴，问是不是这种登录模式会拉不到用户授权（在这里感谢我的小伙伴们没打死我，反而认真给我解惑），后来我清了下开发者工具缓存就能拉下来了（在这里求求TX的大佬们再做做开发者工具的优化吧，写原生的真的要流泪了）     

如果觉得上面屁话太多可以不看哈，只要记住：    

 使用输入账号密码和用户授权的登录模式都是可以拉下来授权的（小声bb:其实我感觉平地都能拉授权）

使用

获得经纬度加逆解析得到详细地址

先要有个腾讯地图的key官网：https://lbs.qq.com/

贴上百度经验申请腾讯地图key的链接（比我自己写的详细得多）：jingyan.baidu.com/article/656…

贴上官网API地址：developers.weixin.qq.com/miniprogram…

记得在app.json里面配置： 

 "permission": {
 "scope.userLocation": { "desc": "我们将根据您的定位进行服务分类" } },

参数什么的以官方的为准，以下为具体代码：

var QQMapWX = require('../../../utils/qqmap-wx-jssdk.js');
const { request } = require("../../../utils/util");
var qqmapsdk
//onload里面写的：
 // 实例化腾讯地图API核心类
 qqmapsdk = new QQMapWX({
 key: '###MiaoWu~###'//这个去腾讯地图申请
 });

 // 获取用户的实时位置 getAddress() {
 var that = this;
 //1、获取当前位置坐标
 wx.getLocation({
  type: 'wgs84',
  success: function (res) {
  //2、根据坐标获取当前位置名称，显示在顶部:腾讯地图逆地址解析
  qqmapsdk.reverseGeocoder({
   location: {
   latitude: res.latitude,
   longitude: res.longitude
   },
   success: function (addressRes) {
   // 显示位置
   var address = addressRes.result.formatted_addresses.recommend;
   console.log(address);
   that.setData({ 
    latitude: res.latitude, 
    longitude: res.longitude,
    addressNow: address
   })
   }
  })
  },
  fail: function () {
  console.log("调取失败")
  }
 })
 },

画地图并获得经纬度以及详细地址

方法和上面写的相差无几，就是多了点wxml的东西

官方map地址：developers.weixin.qq.com/miniprogram…

业务需求不能让用户搜索以及选点，只能看自己所在位置，再加上开发者工具上暂不支持比例尺，所以这个图就当看着意思意思（还有开发者工具上定位贼不准，都给我整到区政府去了，各位在用的时候还是看自己手机调吧）

最后贴上逆解析文件qqmap-wx-jssdk.js的代码：

（不是我写的哈，我只是大佬的搬运工QAQ）

var ERROR_CONF = {
 KEY_ERR: 311,
 KEY_ERR_MSG: 'key格式错误',
 PARAM_ERR: 310,
 PARAM_ERR_MSG: '请求参数信息有误',
 SYSTEM_ERR: 600,
 SYSTEM_ERR_MSG: '系统错误',
 WX_ERR_CODE: 1000,
 WX_OK_CODE: 200};var base_URL = 'https://apis.map.qq.com/ws/';
var URL_SEARCH = base_URL + 'place/v1/search';var URL_SUGGESTION = base_URL + 'place/v1/suggestion';var URL_GET_GEOCODER = base_URL + 'geocoder/v1/';var URL_CITY_LIST = base_URL + 'district/v1/list';
var URL_AREA_LIST = base_URL + 'district/v1/getchildren';
var URL_DISTANCE = base_URL + 'distance/v1/';
var Utils = {
 
 location2query(data) {
  if (typeof data == 'string') {
   return data; 
  }
  var query = '';
  for (var i = 0; i < data.length; i++) {
   var d = data[i];
   if (!!query) { 
    query += ';';
   }
   if (d.location) {
    query = query + d.location.lat + ',' + d.location.lng;
   }
   if (d.latitude && d.longitude) {
    query = query + d.latitude + ',' + d.longitude;
   }
  }
  return query;
 },
  
 getWXLocation(success, fail, complete) {
  wx.getLocation({
   type: 'gcj02',
   success: success,
   fail: fail, 
   complete: complete 
  });
 },
  
 getLocationParam(location) {
  if (typeof location == 'string') {
   var locationArr = location.split(',');
   if (locationArr.length === 2) {
    location = {
     latitude: location.split(',')[0], 
     longitude: location.split(',')[1] 
    }; 
   } else {
    location = {};
   }
  } 
  return location;
 },
 
 polyfillParam(param) {
  param.success = param.success || function () { };
  param.fail = param.fail || function () { };
  param.complete = param.complete || function () { };
 },
 
 checkParamKeyEmpty(param, key) {
  if (!param[key]) {
   var errconf = this.buildErrorConfig(ERROR_CONF.PARAM_ERR, ERROR_CONF.PARAM_ERR_MSG + key +'参数格式有误');
   param.fail(errconf);
   param.complete(errconf);
   return true;
  }
  return false;
 },
 
 checkKeyword(param){
  return !this.checkParamKeyEmpty(param, 'keyword');
 },
 
 checkLocation(param) {
  var location = this.getLocationParam(param.location);
  if (!location || !location.latitude || !location.longitude) {
   var errconf = this.buildErrorConfig(ERROR_CONF.PARAM_ERR, ERROR_CONF.PARAM_ERR_MSG + ' location参数格式有误')
   param.fail(errconf);
   param.complete(errconf);
   return false;
  }
  return true;
 },
 
 buildErrorConfig(errCode, errMsg) { 
  return {
   status: errCode, 
   message: errMsg 
  };
 },
 
 buildWxRequestConfig(param, options) {
  var that = this;
  options.header = { "content-type": "application/json" };
  options.method = 'GET';
  options.success = function (res) {
   var data = res.data;
   if (data.status === 0) {
    param.success(data);
   } else {
    param.fail(data);
   }
  };
  options.fail = function (res) {
   res.statusCode = ERROR_CONF.WX_ERR_CODE;
   param.fail(that.buildErrorConfig(ERROR_CONF.WX_ERR_CODE, result.errMsg)); 
  };
  options.complete = function (res) {
   var statusCode = +res.statusCode;
   switch(statusCode) {
    case ERROR_CONF.WX_ERR_CODE: {
     param.complete(that.buildErrorConfig(ERROR_CONF.WX_ERR_CODE, res.errMsg)); 
     break;
    }
    case ERROR_CONF.WX_OK_CODE: { 
     var data = res.data;
     if (data.status === 0) { 
      param.complete(data); 
     } else { 
      param.complete(that.buildErrorConfig(data.status, data.message));
     }
     break;
    }
    default:{
     param.complete(that.buildErrorConfig(ERROR_CONF.SYSTEM_ERR, ERROR_CONF.SYSTEM_ERR_MSG));
    } 
   }
  }
  return options;
 },
  
 locationProcess(param, locationsuccess, locationfail, locationcomplete) {
  var that = this;
  locationfail = locationfail || function (res) { 
   res.statusCode = ERROR_CONF.WX_ERR_CODE;
   param.fail(that.buildErrorConfig(ERROR_CONF.WX_ERR_CODE, res.errMsg));
  };
  locationcomplete = locationcomplete || function (res) {
   if (res.statusCode == ERROR_CONF.WX_ERR_CODE) { 
    param.complete(that.buildErrorConfig(ERROR_CONF.WX_ERR_CODE, res.errMsg));
   }
  };
  if (!param.location) { 
   that.getWXLocation(locationsuccess, locationfail, locationcomplete); 
  } else if (that.checkLocation(param)) { 
   var location = Utils.getLocationParam(param.location); 
   locationsuccess(location);
  }
 }}class QQMapWX {
 
 constructor(options) {
  if (!options.key) {
   throw Error('key值不能为空');
  }
  this.key = options.key;
 }
 
 search(options) {
  var that = this; 
  options = options || {}; 
  Utils.polyfillParam(options);
  if (!Utils.checkKeyword(options)) { 
   return;
  }
  var requestParam = {
   keyword: options.keyword,
   orderby: options.orderby || '_distance',
   page_size: options.page_size || 10,
   page_index: options.page_index || 1,
   output: 'json',
   key: that.key
  };
  if (options.address_format) {
   requestParam.address_format = options.address_format;
  }
  if (options.filter) { 
   requestParam.filter = options.filter;
  }
  var distance = options.distance || "1000";
  var auto_extend = options.auto_extend || 1; 
  var locationsuccess = function (result) {
   requestParam.boundary = "nearby(" + result.latitude + "," + result.longitude + "," + distance + "," + auto_extend +")";
   wx.request(Utils.buildWxRequestConfig(options, {
    url: URL_SEARCH,
    data: requestParam
   }));
  }
  Utils.locationProcess(options, locationsuccess);
 }
 
 getSuggestion(options) {
  var that = this; 
  options = options || {};
  Utils.polyfillParam(options);
  if (!Utils.checkKeyword(options)) {
   return;
  }
  var requestParam = {
   keyword: options.keyword,
   region: options.region || '全国',
   region_fix: options.region_fix || 0,
   policy: options.policy || 0, 
   output: 'json',
   key: that.key 
  };
  wx.request(Utils.buildWxRequestConfig(options, { 
   url: URL_SUGGESTION, 
   data: requestParam 
  }));
 }
 
 reverseGeocoder(options) {
  var that = this; 
  options = options || {};
  Utils.polyfillParam(options);
  var requestParam = {
   coord_type: options.coord_type || 5,
   get_poi: options.get_poi || 0, 
   output: 'json',
   key: that.key
  };
  if (options.poi_options) {
   requestParam.poi_options = options.poi_options
  }
  var locationsuccess = function (result) {
   requestParam.location = result.latitude + ',' + result.longitude;
   wx.request(Utils.buildWxRequestConfig(options, {
    url: URL_GET_GEOCODER,
    data: requestParam
   }));
  };
  Utils.locationProcess(options, locationsuccess);
 }
 
 geocoder(options) {
  var that = this;
  options = options || {};
  Utils.polyfillParam(options);
  if (Utils.checkParamKeyEmpty(options, 'address')) {
   return;
  }
  var requestParam = {
   address: options.address,
   output: 'json',
   key: that.key
  };
  wx.request(Utils.buildWxRequestConfig(options, {
   url: URL_GET_GEOCODER, 
   data: requestParam
  }));
 }
 
 getCityList(options) {
  var that = this;
  options = options || {}; 
  Utils.polyfillParam(options);
  var requestParam = { 
   output: 'json', 
   key: that.key 
  };
  wx.request(Utils.buildWxRequestConfig(options, {
   url: URL_CITY_LIST,
   data: requestParam
  }));
 }
 
 getDistrictByCityId(options) {
  var that = this;
  options = options || {};
  Utils.polyfillParam(options);
  if (Utils.checkParamKeyEmpty(options, 'id')) {
   return;
  }
  var requestParam = {
   id: options.id || '',
   output: 'json',
   key: that.key
  };
  wx.request(Utils.buildWxRequestConfig(options, {
   url: URL_AREA_LIST,
   data: requestParam
  }));
 }
 
 calculateDistance(options) {
  var that = this;
  options = options || {};
  Utils.polyfillParam(options);
  if (Utils.checkParamKeyEmpty(options, 'to')) {
   return;
  } 
  var requestParam = {
   mode: options.mode || 'walking',
   to: Utils.location2query(options.to),
   output: 'json',
   key: that.key
  }; 
  var locationsuccess = function (result) {
   requestParam.from = result.latitude + ',' + result.longitude;
   wx.request(Utils.buildWxRequestConfig(options, {
    url: URL_DISTANCE,
    data: requestParam 
   }));
  }
  if (options.from) {
   options.location = options.from;
  }
    Utils.locationProcess(options, locationsuccess);
 }}
module.exports = QQMapWX;

总感觉还有啥没写，但又想不起来了，回头记起来补吧

实话感觉自己写的这个没什么技术含量，就当给自己的一个总结，所以求各位轻喷

使用如果有问题的话就在评论区滴滴，我会的都跟你说啾咪，就这样啦~

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