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：

1. 使用微信jssdk提供的getLocation API拿到经纬度；

2. 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){varlocation="&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;varexpress="/"+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{//getlocationerror,plzinputaddressalert("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';

returnaxios.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"}