Question

我还在学习javascript，尤其是nodejs，我想从节点地理编码器的res获取city的数据。这是我的代码：

const
    nodeGeocoder = require('node-geocoder');

const
    tes = require('./tes');

let
    options = {
        provider: 'google',
        httpAdapter: 'https',
        apiKey: myapi,
        formatter: null
    };

let geocoder = nodeGeocoder(options);

geocoder.reverse({
    lat: tes.lat,
    lon: tes.lon
})
.then( res => {
    return city = res[0].administrativeLevels.level1long;
})
.catch( err => {
    console.log(err);
})

console.log(city);

Answer 1

使用回调函数或在里面做事.then（）承诺

const
    nodeGeocoder = require('node-geocoder');

const
    tes = require('./tes');

let
    options = {
        provider: 'google',
        httpAdapter: 'https',
        apiKey: myapi,
        formatter: null
    };

let geocoder = nodeGeocoder(options);

geocoder.reverse({
    lat: tes.lat,
    lon: tes.lon
})
.then( res => {
    city = res[0].administrativeLevels.level1long;

    //do here whatever you want   

})
.catch( err => {
    console.log(err);
})

或制作回调函数

function getCity(callback){

 geocoder.reverse({
        lat: tes.lat,
        lon: tes.lon
    })
    .then( res => {
        city = res[0].administrativeLevels.level1long;
        callback(null, city);

    })
    .catch( err => {
        console.log(err);
        callback(err);
    })
}

使用上述功能

 getCity(function(err, city){
  if(err){
    console.log(err);

  }else{
    console.log(city);
  }

})

从node-geocode获取res数据

1 个答案: