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使用jQuery和HTML5等开发一个天气预报web应用

作者:佚名    责任编辑:admin    更新时间:2022-06-22

使用jQuery和HTML5等开发一个天气预报web应用 三联教程

今天我们介绍来自tutorialzine的一个HTML5/jQuery/Yahoo API的开发教程,在这篇文章中我们将介绍如何使用HTML5的Geolocation,jQuery和YahooAPI来开发一个天气预报web应用。 如果你不熟悉HTML5的Geolocation(地理位置服务)。

首先你需要得到Yahoo API的API key,你可以通过如下地址取得对应的API key:

https://developer.apps.yahoo.com/dashboard/createKey.html

以上创建过程中会要求你输入相关应用地址等信息。创建成功后,你可以得到APPID。

主要思路

在这个教程中,我们主要思路如下:

1.使用Geolocation取得用户的地理位置信息

2.然后,使用yahoo的 PlaceFinder API,来通过经纬度来找到具体地点,例如,城市或者国家。其中包括了woeid,这个用来在天气预报应用中找到国家

3.最后,我们将调用yahoo的Weather API来取得天气

web应用代码

HTML

<!DOCTYPE html>
<html>
    <head>
        <meta charset="gbk" />
        <title>Weather Forecast with jQuery &amp; Yahoo APIs</title>       
        <!-- The stylesheet -->
        <link rel="stylesheet" href="assets/css/styles.css" />       
        <!-- Google Fonts -->
        <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Playball|Open+Sans+Condensed:300,700" />       
        <!--[if lt IE 9]>
          <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
        <![endif]-->
    </head>   
    <body>
        <header>
            <h1>Weather Forecast</h1>
        </header>       
        <div id="weather">
            <ul id="scroller">
                <!-- The forecast items will go here -->
            </ul>           
            <a href="#" class="arrow previous">Previous</a>
            <a href="#" class="arrow next">Next</a>           
        </div>       
        <p class="location"></p>       
        <div id="clouds"></div>       
        <footer>
            <h2><i>Tutorial:</i> Weather Forecast with jQuery &amp; Yahoo APIs</h2>
            <a class="tzine" href="http://tutorialzine.com/2012/05/weather-forecast-geolocation-jquery/">Head on to <i>Tutorial<b>zine</b></i> to download this example</a>
        </footer>       
        <!-- JavaScript includes - jQuery, turn.js and our own script.js -->
        <script src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
        <script src="assets/js/script.js" charset="utf-8"></script>       
    </body>
</html>

Javascript

$(function(){   
    /* Configuration */   
    var APPID = 'fa2pT26k';        // Your Yahoo APP id
    var DEG = 'c';        // c for celsius, f for fahrenheit   
    // Mapping the weather codes returned by Yahoo's API
    // to the correct icons in the img/icons folder   
    var weatherIconMap = [
        'storm', 'storm', 'storm', 'lightning', 'lightning', 'snow', 'hail', 'hail',
        'drizzle', 'drizzle', 'rain', 'rain', 'rain', 'snow', 'snow', 'snow', 'snow',
        'hail', 'hail', 'fog', 'fog', 'fog', 'fog', 'wind', 'wind', 'snowflake',
        'cloud', 'cloud_moon', 'cloud_sun', 'cloud_moon', 'cloud_sun', 'moon', 'sun',
        'moon', 'sun', 'hail', 'sun', 'lightning', 'lightning', 'lightning', 'rain',
        'snowflake', 'snowflake', 'snowflake', 'cloud', 'rain', 'snow', 'lightning'
    ];   
    var weatherDiv = $('#weather'),
        scroller = $('#scroller'),
        location = $('p.location');
   
    // Does this browser support geolocation?
    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(locationSuccess, locationError);
    }
    else{
        showError("Your browser does not support Geolocation!");
    }   
    // Get user's location, and use Yahoo's PlaceFinder API
    // to get the location name, woeid and weather forecast   
    function locationSuccess(position) {
        var lat = position.coords.latitude;
        var lon = position.coords.longitude;
        // Yahoo's PlaceFinder API http://developer.yahoo.com/geo/placefinder/
        // We are passing the R gflag for reverse geocoding (coordinates to place name)
        var geoAPI = 'http://where.yahooapis.com/geocode?location='+lat+','+lon+'&flags=