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jQuery code to implement image timing carousel

零到壹度Original: 2018-04-08 17:27:262066browse

This article shares with you the jQuery code to implement scheduled image carousel. It is very detailed and practical. It is suitable for jQuery beginners. Friends who need it can refer to it.

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script type="text/javascript" src="../js/jquery-1.9.1.min.js"></script>
	</head>
	<style type="text/css">
		*{
		 margin: 0;
		 padding: 0;
		}
		ul{
		 list-style: none;
		}
		.slideShow{
		 width: 346px;
		 height: 210px; /*其实就是图片的高度*/
		 border: 1px #eeeeee solid;
		 margin: 100px auto;
		 position: relative;
		 overflow: hidden; /*此处需要将溢出框架的图片部分隐藏*/
		}
		.slideShow ul{
		 width: 2000px;
		 position: relative; /*此处需注意relative : 对象不可层叠，但将依据left，right，top，bottom等属性在正常文档流中偏移位置，如果没有这个属性，图片将不可左右移动*/
		}
		.slideShow ul li{
		 float: left; /*让四张图片左浮动，形成并排的横着布局，方便点击按钮时的左移动*/
		 width: 346px;
		}
		.slideShow .showNav{ /*用绝对定位给数字按钮进行布局*/
		 position: absolute;
		 right: 10px;
		 bottom: 5px;
		 text-align:center;
		 font-size: 12px; 
		 line-height: 20px;
		}
		.slideShow .showNav span{
		 cursor: pointer;
		 display: block;
		 float: left;
		 width: 20px;
		 height: 20px;
		 background: #ff5a28;
		 margin-left: 2px;
		 color: #fff;
		}
		.slideShow .showNav .active{
		 background: #b63e1a;
		}
	</style>
	<body>
		<p class="slideShow">
		  <!--图片布局开始-->
		  <ul>
		  <li><a href="#"><img  src="../img02/05.jpg" / alt="jQuery code to implement image timing carousel" ></a></li>
		  <li><a href="#"><img  src="../img02/02.jpg" / alt="jQuery code to implement image timing carousel" ></a></li>
		  <li><a href="#"><img  src="../img02/03.jpg" / alt="jQuery code to implement image timing carousel" ></a></li>
		  <li><a href="#"><img  src="../img02/04.jpg" / alt="jQuery code to implement image timing carousel" ></a></li>
		  </ul>
		  <!--图片布局结束-->
		   
		  <!--按钮布局开始-->
		  <p class="showNav">
		  <span class="active">1</span>
		  <span>2</span>
		  <span>3</span>
		  <span>4</span>
		  </p>
		  <!--按钮布局结束-->
		 </p>
		
		
		
		<script type="text/javascript">
			$(document).ready(function(){
				 var slideShow=$(".slideShow"), //获取最外层框架的名称
				 ul=slideShow.find("ul"), 
				 showNumber=slideShow.find(".showNav span"),//获取按钮
				 oneWidth=slideShow.find("ul li").eq(0).width(); //获取每个图片的宽度
				 var timer=null; //定时器返回值，主要用于关闭定时器
				 var iNow=0; //iNow为正在展示的图片索引值，当用户打开网页时首先显示第一张图，即索引值为0
				 var interval = 4000;//轮播时间间隔 
				 showNumber.on("click",function(){  //为每个按钮绑定一个点击事件 
					  $(this).addClass("active").siblings().removeClass("active"); //按钮点击时为这个按钮添加高亮状态，并且将其他按钮高亮状态去掉
					  var index=$(this).index(); //获取哪个按钮被点击，也就是找到被点击按钮的索引值
					  iNow=index;
					  ul.animate({
					  	"left":-oneWidth*iNow, //注意此处用到left属性，所以ul的样式里面需要设置position: relative; 让ul左移N个图片大小的宽度，N根据被点击的按钮索引值iNOWx确定
					  })
				 });
				  
				 timer = setInterval(function(){ //打开定时器
						  iNow++;    //让图片的索引值次序加1，这样就可以实现顺序轮播图片
						  if(iNow>showNumber.length-1){ //当到达最后一张图的时候，让iNow赋值为第一张图的索引值，轮播效果跳转到第一张图重新开始
						  	iNow=0;
						  }
						  showNumber.eq(iNow).trigger("click"); //模拟触发数字按钮的click
					 },interval); //4000为轮播的时间
				})
		</script>
	</body>
</html>

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jQuery code to implement image timing carousel

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