微信小程序获取腾讯经纬度，得到具体地址

getCityNameOFLocation: function() {
    var that = 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){
        console.log("定位成功");
        var locationString = res.latitude + "," + res.longitude;   //获取的经度纬度
        wx.request({
          url: 'getCityNameOFLocation: function() {
    var