我正在使用两个功能,第一个是使用地理位置API,我想返回lat和lng
在第二个函数中,我想使用此坐标来获取一些数据 但是我无法在第一个功能上正确导出它。
我得到geolocationData()不是函数。
这是我的代码
const geolocationData = () => {
return navigator.geolocation.getCurrentPosition((position) => {
return position
}, () => {
alert('Unable to fetch your location')
}, { enableHighAccuracy: true })
}
const gpsLocation = async () => {
const lat = geolocationData().position.coords.latitude
const lng = geolocationData().position.coords.longitude
const address = await fetch(`https://maps.googleapis.com/maps/api/geocode/json?latlng=${lat},${lng}&result_type=administrative_area_level_4&key=0000000000000000`)
const weatherData = await fetch(`https://cors-anywhere.herokuapp.com/https://api.darksky.net/forecast/0000000000000/${lat},${lng}?units=si&extend=hourly&exclude=flags&lang=el`)
return {
address: address.json(),
weatherData: weatherData.json()
}
}
答案 0 :(得分:0)
这是因为getCurrentPosition
的工作方式与您预期的不同,因为它不会直接返回lat
和long
。
让我重构一下代码。
我将通过创建一个可以解决当前地理坐标的诺言并在您的主要gpsLocation
函数中调用此诺言来实现这一目标。由于您使用的是async/await
,因此我也会保持这种状态。
总体而言,它看起来像这样:
// a promise that resolves with geo coordinates
const getPosition = (options) => {
return new Promise(function (resolve, reject) {
navigator.geolocation.getCurrentPosition(resolve, reject, options);
});
}
const gpsLocation = async () => {
try {
// calling the promise and awaiting the position object
const geolocationData = await getPosition({ enableHighAccuracy: true });
// destructruing the coordinates from the object
const {latitude: lat, longitude: lng} = geolocationData.coords;
// creating promises for each api call
const addressPromise = fetch(`https://maps.googleapis.com/maps/api/geocode/json?latlng=${lat},${lng}&result_type=administrative_area_level_4&key=0000000000000000`)
const weatherDataPromise = fetch(`https://cors-anywhere.herokuapp.com/https://api.darksky.net/forecast/0000000000000/${lat},${lng}?units=si&extend=hourly&exclude=flags&lang=el`);
// wating for the promises to be resolved in parallel (rather than one after another)
const [address, weatherData] = await Promise.all([addressPromise, weatherDataPromise]);
return {
address: address.json(),
weatherData: weatherData.json()
}
} catch(e) {
alert('Unable to fetch your location')
}
}
这是如何使用它:
(async () => {
const { address, weather } = await gpsLocation();
console.log(address);
console.log(weather);
})();
让我知道上述对您有用的方法;)