onLoad: function () {    var that = this    //定位用户经纬度    wx.getLocation({      type: 'wgs84',      success: function (res) {        var latitude = res.latitude;        var longitude = res.longitude;        //根据经纬度去腾讯地图接口获取用户位置        var data = {          lat:latitude,          lng:longitude        }        // 定位        wx.request({          url: userCarUtil.host + userCarUtil.getCityByGpsOrIp,          data: data,          success: function (res) {            cityId = res.data.data.city_id            var city = res.data.data.city_name            that.setData({              cityName: city            })            // 获取平台免费代卖数据            // console.log("城市id："+cityId);            wx.request({            url: userCarUtil.host + userCarUtil.getChannelByCityId,              data: {city_id:cityId},              success: function (res) {                                that.setData({                  getChannelByCityId: res.data                })              }            });          }        });      }    });  }