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jQuery实现新闻播报滚动及淡入淡出效果示例

2018年04月18日  | 移动技术网IT编程  | 我要评论

本文实例讲述了jquery实现新闻播报滚动及淡入淡出效果。分享给大家供大家参考,具体如下:

下面是上下滚动源码

<!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>www.jb51.net 向上滚动代码带上下翻按钮滚动特效</title>
<style type="text/css">
body{ color:#333; font-size:13px;}
h3,ul,li{margin:0;padding:0; list-style:none;}
.scrollbox{ width: 340px; margin: 0 auto; overflow: hidden; border: 1px solid #cfcfcf; padding: 10px; }
#scrolldiv{width:340px;height:359px; overflow:hidden;}/*这里的高度和超出隐藏是必须的*/
#scrolldiv li{max-height:90px; width:300px; padding:0 20px;background:url(ico-4.gif) no-repeat 10px 23px; overflow:hidden; vertical-align:bottom; zoom:1; border-bottom:#b7b7b7 dashed 1px;}
#scrolldiv li h3{ height:24px; padding-top:13px; font-size:14px; color:#353535; line-height:24px; width:300px;}
#scrolldiv li h3 a{color:#353535; text-decoration:none}#scrolldiv li h3 a:hover{ color:#f00}
#scrolldiv li div{ height:36px; width:300px; color:#416a7f; line-height:18px; overflow:hidden}
#scrolldiv li div a{ color:#416a7f; text-decoration:none}
.scroltit{ height:26px; line-height:26px; padding-bottom:4px; margin-bottom:4px;}
.scroltit h3{ width:100px; float:left;}
.scroltit .updown{float:right; width:32px; height:22px; margin-left:4px}
#but_up{ background:url(up.gif) no-repeat 0 0; text-indent:-9999px}
#but_down{ background:url(down.gif) no-repeat 0 0; text-indent:-9999px}
#n{margin:10px auto; width:920px; border:1px solid #ccc;font-size:12px; line-height:30px;}
#n a{ padding:0 4px; color:#333}
.test{
  margin-top: 50px;
  background: #cccccc;
  border: .5px solid #ddd;
  overflow: hidden;
  height: 44px;
  width: 100px;
}
.test li{
  height: 44px;
  width: 100%;
  float: left;
  line-height: 44px;
  font-size: 18px;
  border-top: .5px solid #ddd;
}
</style>
<script src="jquery-1.4.4.min.js" type="text/javascript"></script>
<script src="jq_scroll.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function(){
  $("#scrolldiv").scroll({line:1,speed:500,timer:2000,up:"but_up",down:"but_down"});
  (function(){
    var lineh = $(".test").find("li:first").height();
    var appendto = function(){
      $(".test").find("li:first").appendto($(".test"));
      $(".test ul").css("margintop", 0);
    };
    var animate = function(){
      $(".test ul").eq(0).animate({
        margintop: -lineh
      },500,appendto)
    };
    var delayer = setinterval(animate, 2000);
  })()
});
</script>
</head>
<body>
<p align="center"><strong>特效效果如下:</strong></p>
<p> </p>
<div class="scrollbox">
  <div id="scrolldiv">
    <ul>
      <li><h3><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="linktit">移动娱乐业务突飞</a></h3></li>
      <li><h3><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="linktit">不停转动向上滚动可控制向上向下滚动特效</a></h3> <div>div css js自动不断向上一个一个滚动可控制向上向下滚动特效... </div></li>
      <li><h3><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="linktit">全国涂料总产量呈现直线下滑态势</a></h3> <div>我国涂料工业将面临涂料消费税征收全面铺开,环保压力持续增加,2015年的形势不容乐观... </div></li>
      <li><h3><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="linktit">镂空渔网超吸睛</a></h3> <div>镂空罩衫,短短的版型穿起来显高又俏皮,内搭长款连衣裙,非常大方哦... </div></li>
      <li><h3><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="linktit">主题创业街亮相</a></h3> <div>目前已有包括咖啡厅、酒吧、餐厅、瑜伽室在内的8家商铺入驻该火车... </div></li>
    </ul>
  </div>
  <div class="scroltit"><div class="updown" id="but_down">向上</div><div class="updown" id="but_up">向下</div></div>
</div>
<div class="test">
  <ul>
    <li>sections1</li>
    <li>sections2</li>
    <li>sections3</li>
    <li>sections4</li>
  </ul>
</div>
</body>
</html>

下面是jq插件源码

/*
jq向上滚动带上下翻页按钮
*/
(function($){
$.fn.extend({
    scroll:function(opt,callback){
        //参数初始化
        if(!opt) var opt={};
        var _btnup = $("#"+ opt.up);//shawphy:向上按钮
        var _btndown = $("#"+ opt.down);//shawphy:向下按钮
        var timerid;
        var _this=this.eq(0).find("ul:first");
        var   lineh=_this.find("li:first").height(), //获取行高,此处行高固定但是当文字伟一行或者两行时,要动态获取吧??
            line=opt.line?parseint(opt.line,10):parseint(this.height()/lineh,10), //每次滚动的行数,默认为一屏,即父容器高度
            speed=opt.speed?parseint(opt.speed,10):500; //卷动速度,数值越大,速度越慢(毫秒)
            timer=opt.timer //?parseint(opt.timer,10):3000; //滚动的时间间隔(毫秒)
        if(line==0) line=1;
        var upheight=0-line*lineh;
        //滚动函数
        var scrollup=function(){
            _btnup.unbind("click",scrollup); //shawphy:取消向上按钮的函数绑定
            _this.animate({
              //当滚动的元素height为max-height时,实时获取元素height
                margintop:-_this.find("li:first").height()
            },speed,function(){
                // for(i=1;i<=line;i++){
                //     _this.find("li:first").appendto(_this);
                // }
                _this.find("li:first").appendto(_this);
                _this.css({margintop:0});
                _btnup.bind("click",scrollup); //shawphy:绑定向上按钮的点击事件
            });
        }
        //shawphy:向下翻页函数
        var scrolldown=function(){
            _btndown.unbind("click",scrolldown);
            for(i=1;i<=line;i++){
                _this.find("li:last").show().prependto(_this);
            }
            _this.css({margintop:-_this.find("li:first").height()});
            _this.animate({
                margintop:0
            },speed,function(){
                _btndown.bind("click",scrolldown);
            });
        }
        //shawphy:自动播放
        var autoplay = function(){
            if(timer)timerid = window.setinterval(scrollup,timer);
        };
        var autostop = function(){
            if(timer)window.clearinterval(timerid);
        };
         //鼠标事件绑定
        _this.hover(autostop,autoplay).mouseout();
        _btnup.css("cursor","pointer").click( scrollup ).hover(autostop,autoplay);//shawphy:向上向下鼠标事件绑定
        _btndown.css("cursor","pointer").click( scrolldown ).hover(autostop,autoplay);
    }
})
})(jquery);

另外再贴一份,删改之后的脚本

/*
jq向上滚动带上下翻页按钮
*/
(function($){
$.fn.extend({
    txtscroll:function(opt,callback){
        //参数初始化
        if(!opt) var opt={};
        var _btnup = $("#"+ opt.up);//shawphy:向上按钮
        var _btndown = $("#"+ opt.down);//shawphy:向下按钮
        var timerid;
        var _this=this.eq(0).find("ul:first");
            speed=opt.speed?parseint(opt.speed,10):500; //卷动速度,数值越大,速度越慢(毫秒)
            timer=opt.timer?parseint(opt.timer,10):2000; //滚动的时间间隔(毫秒)
        //滚动函数
        var scrollup=function(){
            _btnup.unbind("click",scrollup); //shawphy:取消向上按钮的函数绑定
            _this.animate({
                //当滚动的元素height为max-height时,实时获取元素height
                margintop: -_this.find("li:first").height()
            },speed,function(){
                _this.find("li:first").appendto(_this);
                _this.css({"margintop":0});
                _btnup.bind("click",scrollup); //shawphy:绑定向上按钮的点击事件
            });
        }
        //shawphy:向下翻页函数
        var scrolldown=function(){
            _btndown.unbind("click",scrolldown);
            _this.find("li:last").show().prependto(_this);
            _this.css({margintop:-_this.find("li:first").height()});
            _this.animate({
                margintop:0
            },speed,function(){
                _btndown.bind("click",scrolldown);
            });
        }
        //shawphy:自动播放
        var autoplay = function(){
            if(timer) setintervalt = window.setinterval(scrollup,timer);
        };
        var autostop = function(){
            if(timer)window.clearinterval(setintervalt);
        };
         //鼠标事件绑定
        _this.hover(autostop,autoplay).mouseout();
        _btnup.css("cursor","pointer").click( scrollup ).hover(autostop,autoplay);//shawphy:向上向下鼠标事件绑定
        _btndown.css("cursor","pointer").click( scrolldown ).hover(autostop,autoplay);
    }
})
})(jquery);

运行效果如下:

更多关于jquery相关内容感兴趣的读者可查看本站专题:《jquery常用插件及用法总结》、《jquery扩展技巧总结》、《jquery拖拽特效与技巧总结》、《jquery常见经典特效汇总》、《jquery动画与特效用法总结》及《jquery选择器用法总结

希望本文所述对大家jquery程序设计有所帮助。

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