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An explanation of how to develop WeChat mini programs and target the current city

巴扎黑
巴扎黑Original
2017-09-12 10:54:092862browse

微信小程序 定位到当前城市

首先需要申请百度地图Geocoding API

Geocoding API包括地址解析和逆地址解析功能:

1.地理编码:即地址解析,由详细到街道的结构化地址得到百度经纬度信息,例如:“北京市海淀区中关村南大街27号”地址解析的结果是“lng:116.31985,lat:39.959836”。同时,地理编码也支持名胜古迹、标志性建筑名称直接解析返回百度经纬度,例如:“百度大厦”地址解析的结果是“lng:116.30815,lat:40.056885” ,通用的POI检索需求,建议使用Place API。

2.逆地理编码:即逆地址解析,由百度经纬度信息得到结构化地址信息,例如:“lat:31.325152,lng:120.558957”逆地址解析的结果是“江苏省苏州市虎丘区塔园路318号”。

代码:

Page({ 
 data:{ 
 city:'' 
 }, 
 onLoad:function(options){ 
 this.loadInfo(); 
 }, 
 loadInfo:function(){ 
 var page=this 
 wx.getLocation({ 
 type: 'wgs84', // 默认为 wgs84 返回 gps 坐标,gcj02 返回可用于 wx.openLocation 的坐标 
 success: function(res){ 
 // success 
 var longitude=res.longitude 
 var latitude=res.latitude 
 page.loadCity(longitude,latitude) 
 }, 
 fail: function() { 
 // fail 
 }, 
 complete: function() { 
 // complete 
 } 
 }) 
 }, 
 loadCity:function(longitude,latitude){ 
 var page =this 
 wx.request({ 
 url: 'https://api.map.baidu.com/geocoder/v2/?ak=您的ak &location='+latitude+','+longitude+'&output=json', 
 data: {}, 
 header:{ 
 'Content-Type':'application/json' 
 }, 
 success: function(res){ 
 // success 
 console.log(res); 
 var city=res.data.result.addressComponent.city; 
 page.setData({city:city}); 
 }, 
 fail: function() { 
 // fail 
 }, 
 complete: function() { 
 // complete 
 } 
 }) 
 } 
})

index.wxml

<!--index.wxml--> 
<view class="container"> 
pw_city 
</view>

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