[Javascript][jQuery]模拟Marquee无缝循环滚动

具体可见示例：模拟Marquee无缝滚动

 

代码如下：

/**
* @classDescription 模拟Marquee，无间断滚动内容
* @author Aken Li(www.kxbd.com)
* @DOM
*       <div id="marquee">
*           <ul>
*                <li></li>
*                <li></li>
*           </ul>
*       </div>
* @CSS
*       #marquee {width:200px;height:50px;overflow:hidden;}
* @Usage
*       $('#marquee').kxbdMarquee(options);
* @options
*     isEqual:true,//所有滚动的元素长宽是否相等,true,false
*       loop: 0,//循环滚动次数，0时无限
*     direction: 'left',//滚动方向，'left','right','up','down'
*     scrollAmount:1,//步长
*     scrollDelay:20//时长
*/
(function($){

     $.fn.kxbdMarquee = function(options){
         var opts = $.extend({},$.fn.kxbdMarquee.defaults, options);
        
         return this.each(function(){
             var $marquee = $(this);//滚动元素容器
             var _scrollObj = $marquee.get(0);//滚动元素容器DOM
             var scrollW = $marquee.width();//滚动元素容器的宽度
             var scrollH = $marquee.height();//滚动元素容器的高度
             var $element = $marquee.children(); //滚动元素
             var $kids = $element.children();//滚动子元素
             var scrollSize=0;//滚动元素尺寸
             var _type = (opts.direction == 'left' || opts.direction == 'right') ? 1:0;//滚动类型，1左右，0上下
            
             //防止滚动子元素比滚动元素宽而取不到实际滚动子元素宽度
             $element.css(_type?'width':'height',10000);
             //获取滚动元素的尺寸
             if (opts.isEqual) {
                 scrollSize = $kids[_type?'outerWidth':'outerHeight']() * $kids.length;
             }else{
                 $kids.each(function(){
                     scrollSize += $(this)[_type?'outerWidth':'outerHeight']();
                 });
             }
             //滚动元素总尺寸小于容器尺寸，不滚动
             if (scrollSize<(_type?scrollW:scrollH)) return;
             //克隆滚动子元素将其插入到滚动元素后，并设定滚动元素宽度
             $element.append($kids.clone()).css(_type?'width':'height',scrollSize*2);
            
             var numMoved = 0;
             function scrollFunc(){
                 var _dir = (opts.direction == 'left' || opts.direction == 'right') ? 'scrollLeft':'scrollTop';
                 if (opts.loop > 0) {
                     numMoved+=opts.scrollAmount;
                     if(numMoved>scrollSize*opts.loop){
                         _scrollObj[_dir] = 0;
                         return clearInterval(moveId);
                     }
                 }
                 if(opts.direction == 'left' || opts.direction == 'up'){
                     _scrollObj[_dir] +=opts.scrollAmount;
                     if(_scrollObj[_dir]>=scrollSize){
                         _scrollObj[_dir] = 0;
                     }
                 }else{
                     _scrollObj[_dir] -=opts.scrollAmount;
                     if(_scrollObj[_dir]<=0){
                         _scrollObj[_dir] = scrollSize;
                     }
                 }
             }
             //滚动开始
             var moveId = setInterval(scrollFunc, opts.scrollDelay);
             //鼠标划过停止滚动
             $marquee.hover(
                 function(){
                     clearInterval(moveId);
                 },
                 function(){
                     clearInterval(moveId);
                     moveId = setInterval(scrollFunc, opts.scrollDelay);
                 }
             );
            
         });
     };
     $.fn.kxbdMarquee.defaults = {
         isEqual:true,//所有滚动的元素长宽是否相等,true,false
         loop: 0,//循环滚动次数，0时无限
         direction: 'left',//滚动方向，'left','right','up','down'
         scrollAmount:1,//步长
         scrollDelay:20//时长

     };
     $.fn.kxbdMarquee.setDefaults = function(settings) {
         $.extend( $.fn.kxbdMarquee.defaults, settings );
     };
})(jQuery);

 

调用页面 展示

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>kxbdMarquee - 模拟Marquee无缝滚动</title>
<meta name="generator" content="Aptana" />
<meta name="author" content="Aken Li@www.kxbd.com" />
<meta name="keywords" content="" />
<meta name="description" content="" />
<style type="text/css">
   * {margin:0;padding:0;}
   body { font-size:12px;}
   a {color:#333;}
   ul {list-style:none;}
   #marquee1 {position:absolute;top:80px;left:50px;width:310px;height:45px;overflow:hidden;background:#333;border:2px solid #333;}
   #marquee1 ul li {float:left; padding:0 1px;}
   #marquee1 ul li img {display:block;}
  
   #marquee2 {position:absolute;top:80px;left:400px;width:300px;height:25px;overflow:hidden; background:#EFEFEF;}
   #marquee2 ul li {float:left; padding:0 10px; line-height:25px;}
  
   #marquee3 {position:absolute;top:150px;left:50px;width:60px;height:235px;overflow:hidden;background:#333;border:2px solid #333;}
   #marquee3 ul li {float:left; padding:1px 0;}
   #marquee3 ul li img {display:block;}
  
   #marquee4 {position:absolute;top:150px;left:400px;width:200px;height:200px; overflow:hidden;background:#EFEFEF;}
   #marquee4 ul li {float:left; width:180px; padding:10px; line-height:20px;}
  
</style>
<script type="text/javascript" src="../scripts/jquery-1.3.2.js"></script>
<script type="text/javascript" src="kxbdMarquee.js"></script>
<script type="text/javascript">
   $(function(){
    $('#marquee1').kxbdMarquee({direction:'right'});
    $('#marquee2').kxbdMarquee({isEqual:false});
    $('#marquee3').kxbdMarquee({direction:'down'});
    $('#marquee4').kxbdMarquee({direction:'up',isEqual:false});
   });
</script>
</head>

<body>
<div id="marquee1">
   <ul>
    <li><img src="../images/01s.jpg" width="60" height="45" /></li>
    <li><img src="../images/02s.jpg" width="60" height="45" /></li>
    <li><img src="../images/03s.jpg" width="60" height="45" /></li>
    <li><img src="../images/04s.jpg" width="60" height="45" /></li>
    <li><img src="../images/05s.jpg" width="60" height="45" /></li>
    <li><img src="../images/06s.jpg" width="60" height="45" /></li>
    <li><img src="../images/07s.jpg" width="60" height="45" /></li>
    <li><img src="../images/08s.jpg" width="60" height="45" /></li>
   </ul>
</div>

<div id="marquee2">
   <ul>
    <li><a href="#">新闻公告一</a></li>
    <li><a href="#">新闻公告二新闻公告二新闻公告二新闻公告二</a></li>
    <li><a href="#">新闻公告三新闻公告三</a></li>
    <li><a href="#">新闻公告四新闻公告四新闻公告四</a></li>
    <li><a href="#">新闻公告五新闻公告五新闻公告五新闻公告五新闻公告五新闻公告五新闻公告五新闻公告五新闻公告五新闻公告五</a></li>
    <li><a href="#">新闻公告六新闻公告六新闻公告六</a></li>
   </ul>
</div>

<div id="marquee3">
   <ul>
    <li><img src="../images/01s.jpg" width="60" height="45" /></li>
    <li><img src="../images/02s.jpg" width="60" height="45" /></li>
    <li><img src="../images/03s.jpg" width="60" height="45" /></li>
    <li><img src="../images/04s.jpg" width="60" height="45" /></li>
    <li><img src="../images/05s.jpg" width="60" height="45" /></li>
    <li><img src="../images/06s.jpg" width="60" height="45" /></li>
    <li><img src="../images/07s.jpg" width="60" height="45" /></li>
    <li><img src="../images/08s.jpg" width="60" height="45" /></li>
   </ul>
</div>

<div id="marquee4">
   <ul>
    <li><a href="#">新闻公告一新闻公告一</a></li>
    <li><a href="#">新闻公告二新闻公告二新闻公告二新闻公告二新闻公告二新闻公告二新闻公告二新闻公告二新闻公告二新闻公告二新闻公告二新闻公告二新闻公告二新闻公告二新闻公告二新闻公告二</a></li>
    <li><a href="#">新闻公告三新闻公告三新闻公告三新闻公告三</a></li>
    <li><a href="#">新闻公告四新闻公告四新闻公告四新闻公告四新闻公告四新闻公告四</a></li>
    <li><a href="#">新闻公告五新闻公告五新闻公告五新闻公告五新闻公告五</a></li>
    <li><a href="#">新闻公告六新闻公告六新闻公告六新闻公告六新闻公告六新闻公告六</a></li>
   </ul>
</div>
</body>
</html>