我正在创建一个基本的天气应用程序。它从开放式天气API中获取天气数据，然后显示温度和位置。我找到了SKYCONS，并认为它们将是向我的应用添加图标的一种好方法。但是，它们不会出现。
<link rel="stylesheet" href="bootstrap.css"/>
<link rel="stylesheet" href="style.css"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
<script src="https://rawgithub.com/darkskyapp/skycons/master/skycons.js"></script>
<script src="Script.js"></script>
<body>
<div class="col-xs-12 text-center">
<h1>Weather App</h1>
<div class="container">
<br>
<h3><span id = "city">{City here}</span><span id = "country">{Country here}</span></h3>
<h1><span id = "temperature">{Temperature here}</span><span id="unit">℉</span></h1>
<h2><span id = "weather">{Weather here}</span></h2>
<br>
<p class = "text"></p>
<br>
<figure id = "icon"><canvas id="partly-cloudy-night" width="175" height="175"></canvas></figure>
<br>
</div>
</div>
</body>
这是脚本：
$(document).ready(function(){
// gets user's location; shows Earth weather if location cannot be accessed
var longitude = 0;
var latitude = 0;
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
latitude = Math.floor(position.coords.latitude);
longitude = Math.floor(position.coords.longitude);
});
}
$.getJSON("http://api.openweathermap.org/data/2.5/weather?lat=" + latitude + "&lon=" + longitude + "&appid=44db6a862fba0b067b1930da0d769e98", function(json){
// gets data from json
$("#city").html(json.name);
$("#country").html(", " + json.sys.country);
var weather = json.weather[0].main;
$("#weather").html(weather);
var tempInKelvin = parseFloat(json.main.temp);
var tempInCelsius = Math.round((tempInKelvin - 273.15)*10)/10;
var tempInFahrenheit = tempInCelsius + 32;
$("#temperature").html(tempInFahrenheit); // shows temperature in Fahrenheit by default
// switches between Fahrenheit and Celsius when clicked
var iterator = 1; // because .toggle() was deprecated in jQuery 1.9
$("#unit").on("click", function(){
if (iterator % 2 == 1) {
$("#unit").html("℃"); // change to Celsius
$("#temperature").html(tempInCelsius);
} else {
$("#unit").html("℉"); // change back to Fahrenheit
$("#temperature").html(tempInFahrenheit);
}
iterator++;
});
// Changes background according to time of day
var time = new Date();
time = time.getHours();
var color = "";
if (time >= 19 || time <= 4) {
color = "#283048";
} else if (time >= 17) {
color = "#F0CB35";
} else if (time >= 7) {
color = "#C02425";
} else {
color = "#FF512F";
}
$("body").css("background-color", color);
// adds icon, depending on time and weather
var icons = new Skycons({"color": "red"});
var htmlToAdd = '';
switch (weather.toLowerCase()) {
case "clouds":
if (time >= 19 || time <= 4) {
htmlToAdd = '<canvas id="partly-cloudy-night" width="175" height="175"></canvas>';
icons.set("partly-cloudy-night", Skycons.PARTLY_CLOUDY_NIGHT);
} else {
htmlToAdd = '<canvas id="cloudy" width="175" height="175"></canvas>';
icons.set("cloudy", Skycons.CLOUDY);
}
$("#weather").html("Cloudy");
break;
case "rain":
htmlToAdd = '<canvas id="rain" width="175" height="175"></canvas>';
icons.set("rain", Skycons.RAIN);
break;
case "snow":
htmlToAdd = '<canvas id="snow" width="175" height="175"></canvas>';
icons.set("snow", Skycons.SNOW);
break;
case "clear":
if (time >= 19 || time <= 4) {
htmlToAdd = '<canvas id="clear-night" width="175" height="175"></canvas>';
icons.set("clear-night", Skycons.CLEAR_NIGHT);
} else {
htmlToAdd = '<canvas id="clear-day" width="175" height="175"></canvas>';
icons.set("clear-day", Skycons.CLEAR_DAY);
}
break;
default:
htmlToAdd = '<canvas id="rain" width="175" height="175"></canvas>';
icons.set("rain", Skycons.RAIN);
}
$("#icon").html(htmlToAdd);
icons.play();
});
});
是的，我知道我正在getJSON中进行所有操作，但是我不知道如何在没有getJSON的异步运行方式的情况下将JSON值存储到全局变量。
最佳答案
我知道这是一个老问题，但是如果有人在寻找答案，我也会遇到同样的问题，然后我认为这可能是因为脚本在页面加载之前就已加载。我将脚本移动到页面底部，并且可以正常工作。