微信小程序-获取当前城市位置

 微信小程序-获取当前城市位置

   1, 获取当前地理位置,首先要拿到用户的授权wx.openSetting;

    2,微信的getLocation接口,获取当前用户的地理位置(微信返回的是经纬度,速度等参数);

    3,微信没有将经纬度直接转换为地理位置,借用腾讯位置服务中关于微信小程序的地理转换JS SDK 的API(返回信息中包括国家,省,市,区,经纬度等地理位置)
步骤描述清楚以后,下面就开始按步骤操作了;(本文仅仅讲述如何获取用户地理位置的授权)

图示为获取用户地理位置授权弹窗
20180526004959113

在用户首次进入某页面(需要地理位置授权)时候,在页面进行onLoad,onShow时候,进行调用wx.getLocation要求用户进行授权;以后每次进入该页面时,通过wx.getSetting接口,返回用户授权具体信息。

wx.getSetting接口具体API地址链接为点击打开链接

上图中scope.userLocation就是地理授权的标志;

当该标志是underfind,表示用户初次进入该页面,当该标志是false,表示用户初次进入该页面拒绝了地理授权,应进行重新要求获取授权。

    wx.getSetting({
      success: (res) => {
        console.log(JSON.stringify(res))
        // res.authSetting['scope.userLocation'] == undefined    表示 初始化进入该页面
        // res.authSetting['scope.userLocation'] == false    表示 非初始化进入该页面,且未授权
        // res.authSetting['scope.userLocation'] == true    表示 地理位置授权
        if (res.authSetting['scope.userLocation'] != undefined && res.authSetting['scope.userLocation'] != true) {
          wx.showModal({
            title: '请求授权当前位置',
            content: '需要获取您的地理位置,请确认授权',
            success: function (res) {
              if (res.cancel) {
                wx.showToast({
                  title: '拒绝授权',
                  icon: 'none',
                  duration: 1000
                })
              } else if (res.confirm) {
                wx.openSetting({
                  success: function (dataAu) {
                    if (dataAu.authSetting["scope.userLocation"] == true) {
                      wx.showToast({
                        title: '授权成功',
                        icon: 'success',
                        duration: 1000
                      })
                      //再次授权,调用wx.getLocation的API
                      
                    } else {
                      wx.showToast({
                        title: '授权失败',
                        icon: 'none',
                        duration: 1000
                      })
                    }
                  }
                })
              }
            }
          })
        } else if (res.authSetting['scope.userLocation'] == undefined) {
          //调用wx.getLocation的API
        }
        else {
          //调用wx.getLocation的API
        }
      }
    })

在拿到用户授权以后,使用微信的API获取当前位置的经纬度微信获取位置API

 // 微信获得经纬度
  getLocation: function () {
    let that = this;
    wx.getLocation({
      type: 'wgs84',
      success: function (res) {
        // console.log(JSON.stringify(res))
        var latitude = res.latitude
        var longitude = res.longitude
        var speed = res.speed
        var accuracy = res.accuracy;
        that.getLocal(latitude, longitude)
      },
      fail: function (res) {
        console.log('fail' + JSON.stringify(res))
      }
    })
  },

这里,我们进行使用的是腾讯位置服务;专为小程序开发者提供LBS数据服务工具包,可以在小程序中调用腾讯位置服务的POI检索、关键词输入提示、地址解析、逆地址解析、行政区划和距离计算等数据。
    1,得到开发者秘钥
    2,下载微信小程序javaScriptSDK,

    3,安全域名设置,在“设置” -> “开发设置”中设置request合法域名,添加http://api.map.qq.com

在文件中引入对应的javaScriptSDK文件

var QQMapWX = require('../../../utils/qqmap-wx-jssdk.js');
var qqmapsdk;

在文件中进行js调用,

// 获取当前地理位置
  getLocal: function (latitude, longitude) {
    let that = this;
    let serverUrl = that.globalData.serverUrl
    qqmapsdk.reverseGeocoder({
      location: {
        latitude: latitude,
        longitude: longitude
      },
      success: function (res) {
        //console.log(JSON.stringify(res));
        // let province = res.result.ad_info.province
        let city = res.result.ad_info.city
        // console.log(province + '-----' + city);
        // that.setData({
        //   province: province,
        //   city: city,
        //   latitude: latitude,
        //   longitude: longitude
        // })
        //根据城市名称在后台数据库查询出对应的id
        wx.request({
          url: serverUrl + '/wx/ma/getAreaIdByAreaName?areaName=' + city,
          success(res) {
            //保存到缓存中
            let user = that.globalData.user
            user.cityId = res.data.areaId
            user.cityName = res.data.areaName

            that.globalData.user = user
            wx.setStorageSync('user', user)

          },
          fail(res) {
            console.log("/wx/ma/getAreaIdByAreaName", res.data)
          }
        })

      },
      fail: function (res) {
        console.log(res);
      },
      complete: function (res) {
        // console.log(res);
      }
    });
  },

只在小程序加载的时候调用一次,所以写在app.js里面

const util = require('utils/util.js')
var QQMapWX = require('utils/qqmap-wx-jssdk.min.js');
var qqmapsdk = new QQMapWX({
  key: '开发者自己申请的key'
});
App({
  onShow: function() {

  },
  onLaunch: function() {
wx.getSetting({
      success: (res) => {
        console.log(JSON.stringify(res))
        // res.authSetting['scope.userLocation'] == undefined    表示 初始化进入该页面
        // res.authSetting['scope.userLocation'] == false    表示 非初始化进入该页面,且未授权
        // res.authSetting['scope.userLocation'] == true    表示 地理位置授权
        if (res.authSetting['scope.userLocation'] != undefined && res.authSetting['scope.userLocation'] != true) {

        } else if (res.authSetting['scope.userLocation'] == undefined) {
          //调用wx.getLocation的API
          _this.getLocation();
        } else if (res.authSetting['scope.userLocation'] == true) {
          //调用wx.getLocation的API
          _this.getLocation();
        }
      }
    })
},
 // 微信获得经纬度
  getLocation: function () {
    let that = this;
    wx.getLocation({
      type: 'wgs84',
      success: function (res) {
        // console.log(JSON.stringify(res))
        var latitude = res.latitude
        var longitude = res.longitude
        var speed = res.speed
        var accuracy = res.accuracy;
        that.getLocal(latitude, longitude)
      },
      fail: function (res) {
        console.log('fail' + JSON.stringify(res))
      }
    })
  },
  // 获取当前地理位置
  getLocal: function (latitude, longitude) {
    let that = this;
    let serverUrl = that.globalData.serverUrl
    qqmapsdk.reverseGeocoder({
      location: {
        latitude: latitude,
        longitude: longitude
      },
      success: function (res) {
        //console.log(JSON.stringify(res));
        // let province = res.result.ad_info.province
        let city = res.result.ad_info.city
        // console.log(province + '-----' + city);
        // that.setData({
        //   province: province,
        //   city: city,
        //   latitude: latitude,
        //   longitude: longitude
        // })
        wx.request({
          url: serverUrl + '/wx/ma/getAreaIdByAreaName?areaName=' + city,
          success(res) {
            //保存到缓存中
            let user = that.globalData.user
            user.cityId = res.data.areaId
            user.cityName = res.data.areaName

            that.globalData.user = user
            wx.setStorageSync('user', user)

          },
          fail(res) {
            console.log("/wx/ma/getAreaIdByAreaName", res.data)
          }
        })

      },
      fail: function (res) {
        console.log(res);
      },
      complete: function (res) {
        // console.log(res);
      }
    });
  },

如果每次打开首页,都要提示授权,在index.js书写

//index.js
//获取应用实例
const app = getApp();
var QQMapWX = require('../../../utils/qqmap-wx-jssdk.js');
var qqmapsdk;
Page({
  data: {
    province: '',
    city: '',
    latitude: '',
    longitude: ''
  },
  onLoad: function () {
    qqmapsdk = new QQMapWX({
      key: 'XXXX-XXXX-XXXX-XXXX' //这里自己的key秘钥进行填充
    });
  },
  onShow: function () {
    let vm = this;
    vm.getUserLocation();
  },
  getUserLocation: function () {
    let vm = this;
    wx.getSetting({
      success: (res) => {
        console.log(JSON.stringify(res))
        // res.authSetting['scope.userLocation'] == undefined    表示 初始化进入该页面
        // res.authSetting['scope.userLocation'] == false    表示 非初始化进入该页面,且未授权
        // res.authSetting['scope.userLocation'] == true    表示 地理位置授权
        if (res.authSetting['scope.userLocation'] != undefined && res.authSetting['scope.userLocation'] != true) {
          wx.showModal({
            title: '请求授权当前位置',
            content: '需要获取您的地理位置,请确认授权',
            success: function (res) {
              if (res.cancel) {
                wx.showToast({
                  title: '拒绝授权',
                  icon: 'none',
                  duration: 1000
                })
              } else if (res.confirm) {
                wx.openSetting({
                  success: function (dataAu) {
                    if (dataAu.authSetting["scope.userLocation"] == true) {
                      wx.showToast({
                        title: '授权成功',
                        icon: 'success',
                        duration: 1000
                      })
                      //再次授权,调用wx.getLocation的API
                      vm.getLocation();
                    } else {
                      wx.showToast({
                        title: '授权失败',
                        icon: 'none',
                        duration: 1000
                      })
                    }
                  }
                })
              }
            }
          })
        } else if (res.authSetting['scope.userLocation'] == undefined) {
          //调用wx.getLocation的API
          vm.getLocation();
        }
        else {
          //调用wx.getLocation的API
          vm.getLocation();
        }
      }
    })
  },
  // 微信获得经纬度
  getLocation: function () {
    let vm = this;
    wx.getLocation({
      type: 'wgs84',
      success: function (res) {
        console.log(JSON.stringify(res))
        var latitude = res.latitude
        var longitude = res.longitude
        var speed = res.speed
        var accuracy = res.accuracy;
        vm.getLocal(latitude, longitude)
      },
      fail: function (res) {
        console.log('fail' + JSON.stringify(res))
      }
    })
  },
  // 获取当前地理位置
  getLocal: function (latitude, longitude) {
    let vm = this;
    qqmapsdk.reverseGeocoder({
      location: {
        latitude: latitude,
        longitude: longitude
      },
      success: function (res) {
        console.log(JSON.stringify(res));
        let province = res.result.ad_info.province
        let city = res.result.ad_info.city
        vm.setData({
          province: province,
          city: city,
          latitude: latitude,
          longitude: longitude
        })
 
      },
      fail: function (res) {
        console.log(res);
      },
      complete: function (res) {
        // console.log(res);
      }
    });
  }
})

最后记得在app.json添加permission

{
  "pages": [
    "pages/index/index"
  ],
  "window": {
    "backgroundTextStyle": "light",
    "navigationBarBackgroundColor": "#fff",
    "navigationBarTitleText": "****",
    "navigationBarTextStyle": "black"
  },
  "tabBar": {
    "position": "bottom",
    "backgroundColor": "#fff",
    "borderStyle": "black",
    "color": "#a9a9a9",
    "selectedColor": "#ffa904",
    "list": [
      {
        "pagePath": "pages/index/index",
        "text": "好物",
        "selectedIconPath": "assets/image/icon_nav_haowu_selected.png",
        "iconPath": "assets/image/icon_nav_haowu.png"
      },
      {
        "pagePath": "pages/release/release",
        "text": "发布",
        "selectedIconPath": "assets/image/icon_nav_publish_selected.png",
        "iconPath": "assets/image/icon_nav_publish.png"
      },
      {
        "pagePath": "pages/mine/mine",
        "text": "我",
        "selectedIconPath": "assets/image/icon_nav_me_selected.png",
        "iconPath": "assets/image/icon_nav_me.png"
      }
    ]
  },
  "permission": {
    "scope.userLocation": {
      "desc": " "
    }
  }
}

 

转载于:https://my.oschina.net/whatwhy/blog/3003306

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