jQuery implements simple multi-line scrolling effect code with up and down control buttons

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jQuery implements simple multi-line scrolling effect code with up and down control buttons_jquery

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May 16, 2016 pm 03:40 PM

jquery

The example in this article describes the jQuery implementation of a simple multi-line scrolling effect code with up and down control buttons. Share it with everyone for your reference. The details are as follows:

The jQuery plug-in is used here to achieve the simplest multi-line text scrolling effect. It also has up and down scroll control buttons. The scrolling speed. The larger the value, the slower the speed (milliseconds). The scrolling time interval is (milliseconds) , the number of rows scrolled each time, defaults to one screen, which is the height of the parent container...

The screenshot of the running effect is as follows:

The online demo address is as follows:

http://demo.jb51.net/js/2015/jquery-up-down-scroll-src-style-codes/

The specific code is as follows:

<!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=gb2312" />
<title>用jQuery实现最简单的滚屏效果,加了上下按钮</title>
<style type="text/css">
ul,li{margin:0;padding:0}
#scrollDiv{width:300px;height:100px;min-height:25px;line-height:25px;border:#ccc 1px solid;overflow:hidden}
#scrollDiv li{height:25px;padding-left:10px;}
</style>
<script type="text/javascript" src="jquery-1.6.2.min.js"></script>
<script type="text/javascript">
(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
  line=opt.line&#63;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&#63;parseInt(opt.speed,10):500; //卷动速度，数值越大，速度越慢（毫秒）
  timer=opt.timer //&#63;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({
  marginTop:upHeight
  },speed,function(){
  for(i=1;i<=line;i++){
   _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:upHeight});
  _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);
$(document).ready(function(){
 $("#scrollDiv").Scroll({line:4,speed:500,timer:3000,up:"btn1",down:"btn2"});
});
</script>
</head>
<body>
<p>多行滚动演示：</p>
<div id="scrollDiv">
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</div>
<span id="btn2">向上</span>
<span id="btn1">向下</span>
</body>
</html>

I hope this article will be helpful to everyone’s jquery programming design.

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