移动端百度地图精准获取当前位置

Vue主要代码如下：

import {wgs2bd} from "@views/webApp/comp/appUtil";

methods: {
    getCurrentLocation(){
      navigator.geolocation.getCurrentPosition((res)=>{
        let point = wgs2bd(res.coords.latitude,res.coords.longitude)
        // IP地址放入缓存
        localStorage.setItem("longitude",point[1]);
        localStorage.setItem("latitude",point[0]);
        console.log(res)
      },(err)=>{
        console.log(err)
      },{
        enableHighAcuracy: true, //位置是否精确获取
        timeout: 6000,//获取位置允许的最长时间
        maximumAge: 0 //多久更新获取一次位置
      })
    },
},

坐标转换js代码如下：

//坐标转换核心代码
var pi = 3.14159265358979324;
var a = 6378245.0;
var ee = 0.00669342162296594323;
var x_pi = 3.14159265358979324*3000.0/180.0;


//世界大地坐标转为百度坐标
export function wgs2bd(lat,lon) {
  var wgs2gcjR = wgs2gcj(lat, lon);
  var gcj2bdR = gcj2bd(wgs2gcjR[0], wgs2gcjR[1]);
  return gcj2bdR;
}

function gcj2bd(lat,lon) {
  var x = lon, y = lat;
  var z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
  var theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
  var bd_lon = z * Math.cos(theta) + 0.0065;
  var bd_lat = z * Math.sin(theta) + 0.006;
  var result = [];
  result.push(bd_lat);
  result.push(bd_lon);
  return result;
}

function wgs2gcj(lat,lon) {
  var dLat = transformLat(lon - 105.0, lat - 35.0);
  var dLon = transformLon(lon - 105.0, lat - 35.0);
  var radLat = lat / 180.0 * pi;
  var magic = Math.sin(radLat);
  magic = 1 - ee * magic * magic;
  var sqrtMagic = Math.sqrt(magic);
  dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
  dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
  var mgLat = lat + dLat;
  var mgLon = lon + dLon;
  var result = [];
  result.push(mgLat);
  result.push(mgLon);
  return result;
}

function transformLat(lat,lon) {
  var ret = -100.0 + 2.0 * lat + 3.0 * lon + 0.2 * lon * lon + 0.1 * lat * lon + 0.2 * Math.sqrt(Math.abs(lat));
  ret += (20.0 * Math.sin(6.0 * lat * pi) + 20.0 * Math.sin(2.0 * lat * pi)) * 2.0 / 3.0;
  ret += (20.0 * Math.sin(lon * pi) + 40.0 * Math.sin(lon / 3.0 * pi)) * 2.0 / 3.0;
  ret += (160.0 * Math.sin(lon / 12.0 * pi) + 320 * Math.sin(lon * pi  / 30.0)) * 2.0 / 3.0;
  return ret;
}

function transformLon(lat,lon) {
  var ret = 300.0 + lat + 2.0 * lon + 0.1 * lat * lat + 0.1 * lat * lon + 0.1 * Math.sqrt(Math.abs(lat));
  ret += (20.0 * Math.sin(6.0 * lat * pi) + 20.0 * Math.sin(2.0 * lat * pi)) * 2.0 / 3.0;
  ret += (20.0 * Math.sin(lat * pi) + 40.0 * Math.sin(lat / 3.0 * pi)) * 2.0 / 3.0;
  ret += (150.0 * Math.sin(lat / 12.0 * pi) + 300.0 * Math.sin(lat / 30.0 * pi)) * 2.0 / 3.0;
  return ret;
}