demo:
截图:
实现功能:打开网页时显示用户所在城市的天气状况,在输入框输入城市可查询其它城市。
实现过程:先调用百度地图的 API 来获取用户所在的城市,随后调用聚合数据的天气 API 将数据放在页面上。由于 ajax 不支持跨域,所以采用了 jsonp 的方式来调用数据。
实现的原理比较简单,html 和 CSS 比较长,我就只将 js 代码贴出来,想看完整代码的朋友可以去我的 github 查看
- //调用jsonp函数请求当前所在城市
- jsonp('https://api.map.baidu.com/api?v=2.0&ak=Dv1NMU23dh1sGS9n2tUouDEYY96Dfzh3&s=1&callback=getCity');
- window.onload = function() {
- //请求天气车数据
- btn.onclick = function() {
- jsonp(createUrl());
- }
- };
- function getCity() {
- function city(result) {
- jsonp(createUrl(result.name));
- }
- var cityName = new BMap.LocalCity();
- cityName.get(city);
- }
- // 数据请求函数
- function jsonp(url) {
- var script = document.createElement('script');
- script.src = url;
- document.body.insertBefore(script, document.body.firstChild);
- document.body.removeChild(script);
- }
- //数据请求成功回调函数,用于将获取到的数据放入页面相应位置
- function getWeather(response) {
- var oSpan = document.getElementsByClassName('info');
- var data = response.result.data;
- oSpan[0].innerHTML = data.realtime.city_name;
- oSpan[1].innerHTML = data.realtime.date;
- oSpan[2].innerHTML = '星期' + data.weather[0].week;
- oSpan[3].innerHTML = data.realtime.weather.info;
- oSpan[4].innerHTML = data.realtime.weather.temperature + '℃';
- oSpan[5].innerHTML = data.realtime.wind.direct;
- oSpan[6].innerHTML = data.realtime.weather.humidity + '%';
- oSpan[7].innerHTML = data.realtime.time;
- oSpan[8].innerHTML = data.life.info.ziwaixian[0];
- oSpan[9].innerHTML = data.life.info.xiche[0];
- oSpan[10].innerHTML = data.life.info.kongtiao[0];
- oSpan[11].innerHTML = data.life.info.chuanyi[0];
- var aDiv = document.getElementsByClassName('future_box');
- for (var i = 0; i) {
- var aSpan = aDiv[i].getElementsByClassName('future_info');
- aSpan[0].innerHTML = data.weather[i].date;
- aSpan[1].innerHTML = '星期' + data.weather[i].week;
- aSpan[2].innerHTML = data.weather[i].info.day[1];
- aSpan[3].innerHTML = data.weather[i].info.day[2] + '℃';
- }
- changeImg(response);
- }
- //根据获取到的数据更改页面中相应的图片
- function changeImg(data) {
- var firstImg = document.getElementsByTagName("img")[0];
- var firstWeatherId = data.result.data.realtime.weather.img;
- chooseImg(firstWeatherId, firstImg);
- var aImg = document.getElementById('future_container').getElementsByTagName('img');
- for (var j = 0; j) {
- var weatherId = data.result.data.weather[j].info.day[0];
- chooseImg(weatherId, aImg[j]);
- }
- }
- //选择图片
- function chooseImg(id, index) {
- switch (id) {
- case '0':
- index.src = 'images/weather_icon/1.png';
- break;
- case '1':
- index.src = 'images/weather_icon/2.png';
- break;
- case '2':
- index.src = 'images/weather_icon/3.png';
- break;
- case '3':
- case '7':
- case '8':
- index.src = 'images/weather_icon/4.png';
- break;
- case '6':
- index.src = 'images/weather_icon/6.png';
- break;
- case '13':
- case '14':
- case '15':
- case '16':
- index.src = 'images/weather_icon/5.png';
- break;
- case '33':
- index.src = 'images/weather_icon/7.png';
- break;
- default:
- index.src = 'images/weather_icon/8.png';
- }
- }
- //根据城市名创建请求数据及url
- function createUrl() {
- var cityName = '';
- if (arguments.length == 0) {
- cityName = document.getElementById('text').value;
- } else {
- cityName = arguments[0];
- }
- var url = 'https://op.juhe.cn/onebox/weather/query?cityname=' + encodeURI(cityName) + '&key=1053d001421b886dcecf81a38422a1a2&callback=getWeather';
- return url;
- }
一个简单的小 demo,还有很多不足之处,欢迎大家提出改进建议。
来源: http://www.cnblogs.com/zsqos/p/6147191.html