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* { margin: 0; padding: 0; body { height: 100%; overflow: hidden; #wrap { width: 300px; height: 300px; background: seagreen; color: white; font: 50px/300px "微软雅黑"; text-align: center; border-radius: 50%; top: 25%; left: 25%; margin: auto; position: absolute; transition: 2s; } &:hover #wrap { background: skyblue; } #sector-nav { width: 50px; height: 50px; //fixed：固定位置，默认left/top right/bottom:auto，生效需要指定值为0 position: fixed; top: 0; left: 0; right: 0; bottom: 0; margin: auto; .sector-nav-home { //一旦定位position：absolute绝对定位，那么宽高依赖内容，将被内容撑开 position: absolute; border-radius: 50%; z-index: 1; //最顶层 //position后，需要定义宽高 height: 100%; width: 100%; background: url(../img/home.png) no-repeat; transition: 2s; } .sector-nav-inner { height: 100%; img { position: absolute; border-radius: 50%; //居中，图片为42*42px，上下左右各空4个位置 margin: 4px; //设置每个tag默认位置，这里为null，首次点击不会出现的过渡的bug left: 0; top: 0; } } } }}12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758593.css压缩* { margin: 0; padding: 0;}* body { height: 100%; overflow: hidden;}* body #wrap { width: 300px; height: 300px; background: seagreen; color: white; font: 50px/300px "微软雅黑"; text-align: center; border-radius: 50%; top: 25%; left: 25%; margin: auto; position: absolute; transition: 2s;}* body:hover #wrap { background: skyblue;}* body #sector-nav { width: 50px; height: 50px; position: fixed; top: 0; left: 0; right: 0; bottom: 0; margin: auto;}* body #sector-nav .sector-nav-home { position: absolute; border-radius: 50%; z-index: 1; height: 100%; width: 100%; background: url(../img/home.png) no-repeat; transition: 2s;}* body #sector-nav .sector-nav-inner { height: 100%;}* body #sector-nav .sector-nav-inner img { position: absolute; border-radius: 50%; margin: 4px; left: 0; top: 0;}123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354554.html映射<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title>扇形导航增强版</title> </head> <body> <div id="wrap">cevent</div> <div id="sector-nav"> <div class="sector-nav-home"> </div> <div class="sector-nav-inner"> <img src="img/clos.png" alt="关闭"/> <img src="img/full.png" alt="全屏"/> <img src="img/open.png" alt="打开"/> <img src="img/prev.png" alt="后退"/> <img src="img/refresh.png" alt="刷新"/> </div> </div> </body> <link rel="stylesheet" href="css/sector-navigate-pro.css" /> <script type="text/javascript" src="js/sector-navigate-pro.js"></script></html>123456789101112131415161718192021222324255.效果图
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