效果：我在手机上打开微信小程序，自动显示出我当前所在的地理位置：
具体步骤：
使用微信jssdk提供的getLocation API拿到经纬度；
调用高德地图的api使用经纬度去换取地址的文字描述。
wx.ready(() => {wx.getLocation({type: "gcj02",success: function(res) {var location ="&location=" + res.longitude + "," + res.latitude;ReservationService.getGeocode(location).then(response => {if (response.data.status === "1" &&response.data.info === "OK") {self.country =response.data.regeocode.addressComponent.country;self.city = response.data.regeocode.addressComponent.city;var express ="/" +self.country +"|" +response.data.regeocode.addressComponent.province +"|" +self.city +"|" +response.data.regeocode.addressComponent.district +"|" +response.data.regeocode.addressComponent.township +"/g";self.address = response.data.regeocode.formatted_address.replace(eval(express),"");} else {// get location error, plz input addressalert("无法获取地址信息,请稍后再试");}});}});ReservationService.getGeocode的实现：
getGeocode(location) {
const key = '此处填入您高德地图app的key';
return axios.post('https://restapi.amap.com/v3/geocode/regeo?key=' + key + location);
}
看下面一个使用高德地图API将经纬度转换成文字描述的地址的例子，使用postman发送请求：
API响应：
{"status": "1","regeocode": {"addressComponent": {"city": [],"province": "北京市","adcode": "110101","district": "东城区","towncode": "110101001000","streetNumber": {"number": "44号","location": "116.39795,39.9097239","direction": "东北","distance": "117.874","street": "广场东侧路"},"country": "中国","township": "东华门街道","businessAreas": [{"location": "116.3998109423077,39.90717459615385","name": "天安门","id": "110101"},{"location": "116.39981058278138,39.92383706953642","name": "景山","id": "110101"},{"location": "116.4118112683418,39.91461494422115","name": "王府井","id": "110101"}],"building": {"name": "天安门","type": "风景名胜;风景名胜相关;旅游景点"},"neighborhood": {"name": [],"type": []},"citycode": "010"},"formatted_address": "北京市东城区东华门街道天安门"},"info": "OK","infocode": "10000"}
