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js实现旋转木马轮播图

日期：2018-04-05点击：366收藏

整个页面的文件结构如下图所示：

html部分代码：

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>旋转木马轮播图</title> <link rel="stylesheet" href="css/myStyle.css"/> <script type="text/javascript" src="js/animate.js"></script> <script type="text/javascript" src="js/my.js"></script> </head> <body> <div class="wrap" id="wrap"> <div class="slide" id="slide"> <ul> <li><a href="#"><img src="images/slidepic1.jpg" alt=""/></a></li> <li><a href="#"><img src="images/slidepic2.jpg" alt=""/></a></li> <li><a href="#"><img src="images/slidepic3.jpg" alt=""/></a></li> <li><a href="#"><img src="images/slidepic4.jpg" alt=""/></a></li> <li><a href="#"><img src="images/slidepic5.jpg" alt=""/></a></li> </ul> <div class="arrow" id="arrow"> <a href="javascript:;" class="prev" id="arrLeft"></a> <a href="javascript:;" class="next" id="arrRight"></a> </div> </div> </div> </body> </html>

在html部分引入的myStyle.css文件部分代码

@charset "UTF-8"; blockquote,body,button,dd,dl,dt,fieldset,form,h1,h2,h3,h4, h5, h6, hr, input, legend, li, ol, p, pre, td, textarea, th, ul{ margin:0; padding:0 } body,button,input,select,textarea{ font:12px/1.5 "Microsoft YaHei", "微软雅黑", SimSun, "宋体", sans-serif; color:#666; } ol,ul{ list-style:none } a{ text-decoration:none } fieldset,img{ border:0; vertical-align:top; } a,input,button,select,textarea{ outline:none } a,button{ cursor:pointer } .wrap{ width:1200px; margin:100px auto; } .slide{ height:500px; position: relative; } .slide li{ position:absolute; left:200px; top:0 } .slide li img{ width:100% } .arrow{ opacity:0; } .prev ,.next{ width:76px; height:112px; position:absolute; top:50%; margin-top:-56px; background:url(../images/prev.png) no-repeat; z-index:99; } .next{ right:0; background-image:url(../images/next.png); }

在html部分引入的animate.js文件部分代码

/** * Created by RENPINGSHENG on 2018/4/6. */ function animate(obj,json,fn) { clearInterval(obj.timer); obj.timer = setInterval(function () { var flag = true; for(var k in json){ if( k == "opacity"){ var leader = getStyle(obj,k) * 100; var target = json[k] * 100; var step = (target - leader) /10; step = step > 0 ? Math.ceil(step) : Math.floor(step); leader = leader + step; obj.style[k] = leader /100; } else if ( k == "zIndex"){ obj.style[k] = json[k]; }else{ var leader = parseInt(getStyle(obj,k)) || 0; var target = json[k]; var step = (target - leader) /10; step = step >0 ? Math.ceil(step) : Math.floor(step); leader = leader + step; obj.style[k] = leader + "px"; } console.log("target:" + target + "leader:" + leader + "step:" + step); if (leader != target){ flag = false; } } if (flag){ clearInterval(obj.timer); if(fn){ fn(); } } },15) } function getStyle(obj,attr){ if (obj.currentStyle){ return obj.currentStyle[attr]; }else{ return window.getComputedStyle(obj,null)[attr]; } }

在html部分引入的my.js文件部分代码

/** * Created by RENPINGSHENG on 2018/4/6. */ window.onload = function () { var wrap = document.getElementById("wrap"); var slide = document.getElementById("slide"); var ul = slide.children[0]; var lis = ul.children; var arrow = document.getElementById("arrow"); var arrRight = document.getElementById("arrRight"); var arrLeft = document.getElementById("arrLeft"); var config = [ { width:400, top:20, left:50, opacity:0.2, zIndex:2 }, { width:600, top:70, left:0, opacity:0.8, zIndex:3 }, { width:800, top:100, left:200, opacity:1, zIndex:4 }, { width:600, top:70, left:600, opacity:0.8, zIndex:3 }, { width:400, top:20, left:750, opacity:0.2, zIndex:2 } ]; wrap.onmouseover = function () { animate(arrow,{"opacity":1}); } wrap.onmouseout = function () { animate(arrow,{"opacity":0}); } function assign() { for(var i = 0;i < lis.length;i++){ animate(lis[i],config[i],function(){ flag = true; }) } } var flag = true; assign(); arrRight.onclick = function () { flag = false; config.push(config.shift()); assign(); }; arrLeft.onclick = function () { flag = false; config.unshift(config.pop()); assign(); } }

代码完成后，用浏览器打开网页，效果如下：