小プログラムはどうやって所在都市を決めますか？周辺の捜索を開始します。

/*
 * url {String}        
 * data {Object}      
 * param {Object} request  
 * method {String}     post   get  
*/
export function request(url, data={}, param={}, method='POST') {
 return new Promise((resolve, reject)=>{
  let postParam = {
   url, 
   method,
   data,
   // timeout
   // dataType
   // responseType
   header: {
    'content-type': 'application/json' //    
   },
   success(res) {
    resolve(res)
   },
   error: function (e) {
    reject(e)
   }
  }
  postParam = Object.assign(postParam, param)
  postParam.fail = postParam.error
  if (postParam.url) wx.request(postParam)
 })
}

module.exports = {
 get(url, data, param){
  return request(url, data={}, param={}, method='GET')
 },
 
 post(){
  return request.apply(null, arguments)
 }
}

// request promise  
const iKit = request('./rq.js') 

// key              
//     key     
let key = 'JKDBZ-XZVLW-IAQR8-OROZ1-XR3G9-UYBD5'

/*
 *     ... 
 *        ，     kfc    
 * key {String}      
 * region {String}      
*/
export function searchRegion(kw, region) {
 let opts = {
  keyword: encodeURI(kw),
  boundary: region ? `region(${encodeURI(region)}, 0)` : '', // 0         ，1        
  page_size: 10, //           
  page_index: 1, //     
  key
 }

 return new Promise((resolve, rej)=>{
  iKit.get('https://apis.map.qq.com/ws/place/v1/search', opts).then(res=>{
   resolve(res.data.data)
  })
 })
}

/*
 *      ... 
 *                ，      ，    
 * key {String}      
 * params {Object}             lat  ，lng  ，distance  (   ) 
*/
export function searchCircle(kw, params={}) {
 let {lat, lng, distance} = params
 if (!lat && !lng) return 
 if (!distance) distance = 1000 //       1000 
 let opts = {
  keyword: encodeURI(kw),
  boundary: `nearby(${lat},${lng},${distance})`,
  orderby: '_distance', //         ，     
  page_size: 20, //            
  page_index: 1, //      
  key
 }

 return new Promise((resolve, rej)=>{
  iKit.get('https://apis.map.qq.com/ws/place/v1/search', opts).then(res=>{
   resolve(res.data.data)
  })
 })
}

//       ，       
/*
 *       ，        
 *          、   
 * lat {Number}   
 * lng {Number}    
*/
export function myCity(lat, lng) {
 return new Promise((resolve, rej)=>{
  let opts = {
   location: `${lat},${lng}`,
   key
  }
  
  iKit.get(`https://apis.map.qq.com/ws/geocoder/v1/`, opts).then(res => {
   resolve(res.data.result)
  })
 })
}

wx.getLocation({
  type: 'wgs84',
  success(location) {
   locationPosition = location
   
   //      
   myCity(location.latitude, location.longitude).then(res => {
    let myCityInfo = res.ad_info
    let {city, nation, province, city_code, adcode} = myCityInfo
    console.log({title: `  : ${nation}，  : ${province}，  : ${city}`})
   })
   
   //     
   searchCircle('  ', {
    lat: location.latitude,
    lng: location.longitude,
    distance: 500
   }).then(res=>{
    console.log(res)
   })
   
   //     
   searchRegion('  ', '  ').then(res=>{
    console.log(res)
   })
  }
})