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javascript - “不是函数”错误；尝试使用 Geolocation API 和 Weather API

问题描述

我在通过天气 API 的异步获取函数传递用户位置时遇到问题。

代码

let lat = "48.8566";
let long = "2.3522";

  const fetchWeatherData = (async (lat, long) => {
    const response = await fetch(
      " http://api.weatherstack.com/current?access_key={API_KEY}query=" + lat + "," + long
    ).then(resp => resp.json()).then(
      function(apiResponse) {
       console.log(`Current temperature in ${apiResponse.location.name} is ${apiResponse.current.temperature}℃`);
     }
    );
    return await console.log(response.json());
  })();

  
function setUserLocation() {
  if (navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(setPosition);
    console.log("click on button worked");
  } else { 
    alert("location api not supported by browser");
  }
}

function setPosition(position) {
  lat =  position.coords.latitude;
  long =  position.coords.longitude;
  fetchWeatherData.response(lat, long);
  console.log("Lat: " + lat + " and Long:"  + long);
}

我已尝试更改该功能fetchWeatherData.response(lat, long);，但仍然无法解决该错误fetchWeatherData.response() is not a function at setPosition。我不确定我的错误是来自函数调用，还是来自其他地方，例如async (lat, long) => ....

我能够获取用户位置，但是当我尝试在异步函数中传递新的 lat 和 long 作为参数时，我的问题就开始了。

有没有更好的方法来解决这个问题？

标签： javascriptapiasynchronous

解决方案

你有一个奇怪的组合.then并await继续，尽量不要混合方法：

let lat = "48.8566";
let long = "2.3522";

const fetchWeather = async (lat, long) => {
  const response = await fetch(
    " http://api.weatherstack.com/current?access_key={API_KEY}query=" + lat + "," + long
  )
  const apiResponse = await response.json();
  console.log(`Current temperature in ${apiResponse.location.name} is ${apiResponse.current.temperature}℃`);
  return data
}

function setUserLocation() {
  if (navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(setPosition);
    console.log("click on button worked");
  } else { 
    alert("location api not supported by browser");
  }
}

function setPosition(position) {
  lat = position.coords.latitude;
  long = position.coords.longitude;
  fetchWeather(lat, long);
  console.log("Lat: " + lat + " and Long:"  + long);
}

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