JQ代码实现轮播图功能

约定不等于承诺〃 2022-03-20 07:50 212阅读 0赞

轮播图一般是横向滚动，我自己做了一个竖向滚动的轮播图，代码如下：

<!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>淘宝幻灯片上下滑动效果</title>
    		<link href = "css.css" rel = "stylesheet" type = "text/css" />
    		<script src = '../jquery-1.10.1.min.js'></script>
    		<script>
    			$(function(){
    				var aBtns = $(".play").find("ol").find("li");
    				var oUl = $(".play").find("ul");
    				var aLis = oUl.find("li");
    
    				//<1>设置iNow，代表当前点击的按钮的下标，iNow显示图片的下标
    				var iNow = 0;
    				var timer = null; //记录定时器的返回值
    
    				aBtns.click(function(){
    					iNow = $(this).index();
    					//切换图片
    					tab();
    				})
    
    				//切换图片
    				function tab(){
    					//<2>切换图片，被选中的按钮也要同时切换
    					aBtns.attr("class", "");
    					aBtns.eq(iNow).attr("class", "active");
    
    					//将整个ul滚动到对应图片的位置
    					oUl.stop().animate({top: -150 * iNow}, 500, function(){
    						//动画结束的时候
    						if(iNow == aBtns.size()){
    							iNow = 0;
    							oUl.css("top", 0);
    						}
    					})
    				}
    
    				//启动定时器
    				function timerInner(){
    					iNow++;
    					// document.title = iNow;
    					
    					tab();
    
    					if(iNow == aBtns.size()){
    						aBtns.eq(0).attr("class", 'active');
    					}
    				}
    
    				//<3>启动定时器
    				timer = setInterval(timerInner, 2000);
    
    				oUl.mouseenter(function(){
    					clearInterval(timer);
    				});
    				oUl.mouseleave(function(){
    					timer = setInterval(timerInner, 2000);
    				});
    			})
    		</script>
    	</head>
    	<body>
    	<div class="play" id="play">
    	    <ol>
    	    	<li class="active">1</li>
    	        <li>2</li>
    	        <li>3</li>
    	        <li>4</li>
    	        <li>5</li>
    	    </ol>
    		<ul>
    			<li><a href="http://www.baidu.com/"><img src="images/1.jpg" alt="广告一" /></a></li>
    			<li><a href="http://www.baidu.com/"><img src="images/2.jpg" alt="广告二" /></a></li>
    			<li><a href="http://www.baidu.com/"><img src="images/3.jpg" alt="广告三" /></a></li>
    			<li><a href="http://www.baidu.com/"><img src="images/4.jpg" alt="广告四" /></a></li>
    			<li><a href="http://www.baidu.com/"><img src="images/5.jpg" alt="广告五" /></a></li>
    			<li><a href="http://www.baidu.com/"><img src="images/1.jpg" alt="广告一" /></a></li>
    		</ul>
    	</div>
    	</body>
    </html>

下面是css部分

* { padding: 0; margin: 0; }
    li { list-style: none; }
    img { border: none; }
    
    body { background: #ecfaff; }
    
    .play { width: 470px; height: 150px;   overflow: hidden;   position: relative; margin: 150px auto 0; }
    ol { position: absolute; right: 5px; bottom: 5px; z-index: 2; }
    ol li { float: left; margin-right: 3px; display: inline; cursor: pointer; background: #fcf2cf; border: 1px solid #f47500; padding: 2px 6px; color: #d94b01; font-family: arial; font-size: 12px; }
    .active { padding: 3px 8px; font-weight: bold; color: #ffffff; background: #ffb442; position: relative; bottom: 2px; }
    
    ul { position: absolute; top: 0; left: 0; z-index: 1; }
    ul li { width: 470px; height: 150px; float: left; }
    ul img { float: left; width: 470px; height: 150px; }