JavaScript--水平幻灯片

// 列表布局,图片左浮动,外侧容器设置overflow:hidden;

// 组合使用构造函数模式(对象不共享的数据)和原型模式(对象共享的数据)

 



 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="utf-8">
 5     <style type="text/css" media="screen">
 6         * { margin:0; padding:0; font-size: 14px;}
 7         .slider { width:550px; height:200px; margin:50px auto 0; overflow: hidden;}
 8         .slider ul { width:10000px; list-style:none; }
 9         .slider li { float: left; }
10         .slider li img { width:550px; text-align: center;}
11         #slider-nav { width:550px;  margin:30px auto; text-align: center;}
12         #slider-nav button { height:34px; line-height: 34px; width:75px; text-align: center; cursor:pointer; margin:0 20px;}
13     </style>
14 </head>
15 <body>
16     <div class="slider">
17         <ul>
18             <li><img src="http://www.gbtags.com/gb/networks/uploads/afb73f09-8334-46b2-ad66-4abeb7c67a0a/images/gbtags1.jpg" alt="image"></li>
19             <li><img src="http://www.gbtags.com/gb/networks/uploads/afb73f09-8334-46b2-ad66-4abeb7c67a0a/images/gbtags2.jpg" alt="image"></li>
20             <li><img src="http://www.gbtags.com/gb/networks/uploads/afb73f09-8334-46b2-ad66-4abeb7c67a0a/images/gbtags3.jpg" alt="image"></li>
21             <li><img src="http://www.gbtags.com/gb/networks/uploads/afb73f09-8334-46b2-ad66-4abeb7c67a0a/images/gbtags4.jpg" alt="image"></li>
22         </ul>
23     </div>
24      
25     <div id="slider-nav">
26         <button data-direction="prev">&laquo;&nbsp;上一个</button><button data-direction="next">下一个&nbsp;&raquo;</button>
27     </div>
28 </body>
29     <script src="http://cdn.gbtags.com/jquery/2.1.1/jquery.min.js"></script>
30     <script>
31 
32     function Slider(container,nav){                             // 构造Slider()函数;
33         this.container = container;                             // 定义一系列局部变量;
34         this.nav = nav;
35         this.imgs = this.container.find('img');
36         this.imgWidth = this.imgs[0].width;
37         this.imgsLen = this.imgs.length;
38         this.current = 0;
39     };
40 
41     Slider.prototype.transition = function(){                   // 使用prototype来定义transition()方法;
42         this.container.animate({                                // 编写外包围容器(ul)的运动方向及运动长度;
43             'margin-left':-(this.current*this.imgWidth)
44         });
45     };
46 
47     Slider.prototype.setCurrent = function(dir){                // 使用prototype来定义setCurrent()方法;
48         var pos = this.current;
49         pos += (~~(dir === 'next') || -1);                      // 使用"~~"进行类型转换,转换成数字类型; ~~true == 1; ~~false == 0;
50         this.current = (pos < 0) ? this.imgsLen - 1 : pos % this.imgsLen;
51         return pos;
52     };
53 
54     $(function(){
55         var container = $('.slider').children('ul'),            // 定义container变量的值;
56             slider = new Slider(container, $('#slider-nav'));   // 实例化Slider()函数并传参;
57 
58         slider.nav.find('button').on('click',function(){        // 找到触发按钮并绑定事件;
59             slider.setCurrent($(this).data('direction'));       // 调用setCurrent()函数并传入按钮的data-direction的值;
60             slider.transition();                                // 调用transition()方法,使幻灯片运动;
61         })
62     });
63 
64     </script>
65 </html>

 

 

posted @ 2015-05-28 20:49  翌子涵  阅读(504)  评论(0编辑  收藏  举报