jquery+js gets focus control picture-JS Tutorial-php.cn

jquery+js gets focus control picture

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Release： 2018-04-26 17:06:08

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This time I will bring you jquery js to get the focus control picture. What are the precautions for jquery js to get the focus control picture? The following is a practical case, let's take a look.

<!DOCTYPE html> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title> </title> 
<meta name="description" content="jquery
"/> 
<style type="text/css"> 
*{margin:0;padding:0;} 
body{font-size:12px;color:#222;font-family:Verdana,Arial,Helvetica,sans-serif;background:#f0f0f0;} 
.clearfix:after{content: ".";display: block;height: 0;clear: both;visibility: hidden;} 
.clearfix{zoom:1;} 
ul,li{list-style:none;} 
img{border:0;} 
.wrapper{width:800px;margin:0 auto;padding-bottom:50px;} 
h1{height:50px;line-height:50px;font-size:22px;font-weight:normal;font-family:"Microsoft YaHei",SimHei;margin-bottom:20px;} 
/* focus */ 
#focus{width:800px;height:280px;overflow:hidden;position:relative;} 
#focus ul{height:380px;position:absolute;} 
#focus ul li{float:left;width:800px;height:280px;overflow:hidden;position:relative;background:#000;} 
#focus ul li p{position:absolute;overflow:hidden;} 
#focus .btnBg{position:absolute;width:800px;height:20px;left:0;bottom:0;background:#000;} 
#focus .btn{position:absolute;width:780px;height:10px;padding:5px 10px;right:0;bottom:0;text-align:right;} 
#focus .btn span{display:inline-block;_display:inline;_zoom:1;width:25px;height:10px;_font-size:0;margin-left:5px;cursor:pointer;background:#fff;} 
#focus .btn span.on{background:#fff;} 
#focus .preNext{width:45px;height:100px;position:absolute;top:90px;background:url(img/sprite.png) no-repeat 0 0;cursor:pointer;} 
#focus .pre{left:0;} 
#focus .next{right:0;background-position:right top;} 
</style> 
<script type="text/javascript" src="http://jt.875.cn/js/jquery.js"></script> 
<script type="text/javascript"> 
$(function() { 
var sWidth = $("#focus").width(); //获取焦点图的宽度（显示面积） 
var len = $("#focus ul li").length; //获取焦点图个数 
var index = 0; 
var picTimer; 
//以下代码添加数字按钮和按钮后的半透明条，还有上一页、下一页两个按钮 
var btn = "<p class=&#39;btnBg&#39;></p><p class=&#39;btn&#39;>"; 
for(var i=0; i < len; i++) { 
btn += "<span></span>"; 
} 
btn += "</p><p class=&#39;preNext pre&#39;></p><p class=&#39;preNext next&#39;></p>"; 
$("#focus").append(btn); 
$("#focus .btnBg").css("opacity",0.5); 
//为小按钮添加鼠标滑入事件，以显示相应的内容 
$("#focus .btn span").css("opacity",0.4).mouseover(function() { 
index = $("#focus .btn span").index(this); 
showPics(index); 
}).eq(0).trigger("mouseover"); 
//上一页、下一页按钮透明度处理 
$("#focus .preNext").css("opacity",0.2).hover(function() { 
$(this).stop(true,false).animate({"opacity":"0.5"},300); 
},function() { 
$(this).stop(true,false).animate({"opacity":"0.2"},300); 
}); 
//上一页按钮 
$("#focus .pre").click(function() { 
index -= 1; 
if(index == -1) {index = len - 1;} 
showPics(index); 
}); 
//下一页按钮 
$("#focus .next").click(function() { 
index += 1; 
if(index == len) {index = 0;} 
showPics(index); 
}); 
//本例为左右滚动，即所有li元素都是在同一排向左浮动，所以这里需要计算出外围ul元素的宽度 
$("#focus ul").css("width",sWidth * (len)); 
//鼠标滑上焦点图时停止自动播放，滑出时开始自动播放 
$("#focus").hover(function() { 
clearInterval(picTimer); 
},function() { 
picTimer = setInterval(function() { 
showPics(index); 
index++; 
if(index == len) {index = 0;} 
},4000); //此4000代表自动播放的间隔，单位：毫秒 
}).trigger("mouseleave"); 
//显示图片函数，根据接收的index值显示相应的内容 
function showPics(index) { //普通切换 
var nowLeft = -index*sWidth; //根据index值计算ul元素的left值 
$("#focus ul").stop(true,false).animate({"left":nowLeft},300); //通过animate()调整ul元素滚动到计算出的position 
$("#focus .btn span").stop(true,false).animate({"opacity":"0.4"},300).eq(index).stop(true,false).animate({"opacity":"1"},300); //为当前的按钮切换到选中的效果 
} 
}); 
</script> 
</head> 
<body> 
<p class="wrapper"> 
<h1>jquery图片滚动仿QQ商城带左右按钮控制焦点图片切换滚动</h1> 
<p id="focus"> 
<ul> 
<li><a href="http://www.875.cn/" target="_blank"><img src="img/01.jpg" alt="QQ商城焦点图效果下载" /></a></li> 
<li><a href="http://www.875.cn/" target="_blank"><img src="img/02.jpg" alt="QQ商城焦点图效果教程" /></a></li> 
<li><a href="http://www.875.cn/" target="_blank"><img src="img/03.jpg" alt="jquery商城焦点图效果" /></a></li> 
<li><a href="http://www.875.cn/" target="_blank"><img src="img/04.jpg" alt="jquery商城焦点图代码" /></a></li> 
<li><a href="http://www.875.cn/" target="_blank"><img src="img/05.jpg" alt="jquery商城焦点图源码" /></a></li> 
</ul> 
</p><!--focus end--> 
</p><!-- wrapper end --> 
</body> 
</html>

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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!