工作中网页中有一个扇形的导航菜单,以前没有接触过,参考了
http://www.w3cplus.com/css3/building-a-circular-navigation-with-css-transforms.html以及原网站http://tympanus.net/codrops/2013/08/09/building-a-circular-navigation-with-css-transforms,作者讲得很详细,我就不多说了,下面是我的demo：
有一部分浏览器不支持css3，还需要为其设置另一套样式，通过js判断浏览器类型，并替换样式。
<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title>纯CSS扇形菜单</title> <style type="text/css"> /*导航外层div设为圆形*/ .css-transforms .menu-wrapper { overflow: hidden; zoom: 1; position: relative; width: 460px; height: 460px; margin: 40px auto 0; -webkit-border-radius: 50%; -moz-border-radius: 50%; border-radius: 50%; background: transparent; pointer-events: auto; border: 1px solid #000; } /*覆盖a标签的内侧靠近圆心的部分, 避免鼠标点击事件*/ .css-transforms .menu-wrapper:after{ color: transparent; content:"."; display:block; position: absolute; z-index:10; left: 50%; top:50%; margin-left: -150px; margin-top: -150px; width: 300px; height: 300px; -webkit-border-radius: 50%; -moz-border-radius: 50%; border-radius: 50%; border: 1px solid blue; } .css-transforms .menu-wrapper li { position: absolute; top: -70px; left: -70px; overflow: hidden; width: 300px; height: 300px; transform-origin: 100% 100%; pointer-events: none; border: 1px solid green; } /*a标签反倾斜角度为-(90-x),旋转角度为-x,x为我们想要的圆心角,在这个demo里,有3个列表项,半圆,得出圆心角为60*/ .css-transforms .menu-wrapper li a { position: absolute; right: -200px; bottom: -200px; display: block; width: 420px; height: 420px; border-radius: 50%; color: #fff; text-align: center; text-decoration: none; /*先斜切后旋转,不可颠倒*/ -webkit-transform: skew(-30deg) rotate(-60deg) scale(1); -moz-transform: skew(-30deg) rotate(-60deg) scale(1); -ms-transform: skew(-30deg) rotate(-60deg) scale(1); -o-transform: skew(-30deg) rotate(-60deg) scale(1); transform: skew(-30deg) rotate(-60deg) scale(1); pointer-events: auto; } .css-transforms .menu-wrapper li a span{ display: none; } /*列表项倾斜角度为90-x,每个列表项的旋转角度依次间隔 >60 */ .css-transforms .menu-wrapper li:first-child { -webkit-transform: rotate(-10deg) skew(30deg); -moz-transform: rotate(-10deg) skew(30deg); -ms-transform: rotate(-10deg) skew(30deg); -o-transform: rotate(-10deg) skew(30deg); transform: rotate(-10deg) skew(30deg); } .css-transforms .menu-wrapper li:nth-child(2) { -webkit-transform: rotate(60deg) skew(30deg); -moz-transform: rotate(60deg) skew(30deg); -ms-transform: rotate(60deg) skew(30deg); -o-transform: rotate(60deg) skew(30deg); transform: rotate(60deg) skew(30deg); } .css-transforms .menu-wrapper li:nth-child(3) { -webkit-transform: rotate(-130deg) skew(30deg); -moz-transform: rotate(-130deg) skew(30deg); -ms-transform: rotate(-130deg) skew(30deg); -o-transform: rotate(-130deg) skew(30deg); transform: rotate(130deg) skew(30deg); } .css-transforms .menu-wrapper li a span{ display: none; } .css-transforms .menu-wrapper li:first-child a{ background: radial-gradient(transparent 45%, #dc7d01 35%); } .css-transforms .menu-wrapper li:nth-child(2) a{ background: radial-gradient(transparent 45%, #a70101 35%); } .css-transforms .menu-wrapper li:nth-child(3) a{ background: radial-gradient(transparent 45%, #017d07 35%); } .css-transforms .menu-wrapper li:first-child a:hover, .css-transforms .menu-wrapper li:first-child a:active, .css-transforms .menu-wrapper li:first-child a:focus { background: radial-gradient(transparent 45%, #e88503 35%); } .css-transforms .menu-wrapper li:nth-child(2) a:hover, .css-transforms .menu-wrapper li:nth-child(2) a:active, .css-transforms .menu-wrapper li:nth-child(2) a:focus { background: radial-gradient(transparent 45%, #b40303 35%); } .css-transforms .menu-wrapper li:nth-child(3) a:hover, .css-transforms .menu-wrapper li:nth-child(3) a:active, .css-transforms .menu-wrapper li:nth-child(3) a:focus { background: radial-gradient(transparent 45%, #028b09 35%); } .css-transforms .menu-wrapper li:first-child a img{ margin-top: 8px; -webkit-transform: rotate(-25deg); -moz-transform: rotate(-25deg); -ms-transform: rotate(-25deg); -o-transform: rotate(-25deg); transform: rotate(-25deg); } .css-transforms .menu-wrapper li:nth-child(2) a img{ margin-top: 21px; } .css-transforms .menu-wrapper li:nth-child(3) a img{ margin-top: -2px; -webkit-transform: rotate(-60deg); -moz-transform: rotate(-60deg); -ms-transform: rotate(-60deg); -o-transform: rotate(-60deg); transform: rotate(-60deg) ; } /*不支持css3*/ .no-transforms .menu-wrapper{ margin:10em auto; overflow:hidden; text-align:center; padding:1em; border: 1px solid #000; } .no-transforms .menu-wrapper ul{ display:inline-block; } .no-transforms li{ width:120px; height:50px; float:left; line-height:50px; text-align:center; margin-right: 20px; background-color: #fff; /*border: 1px solid red;*/ } .no-transforms li a{ display:block; height:100%; width:100%; line-height: 50px; text-decoration: none; color: #fff; } .no-transforms .menu-wrapper li a span{ display: block; } .no-transforms .menu-wrapper li a img{ display: none; } .no-transforms li a.first{ background-color: #e88503; } .no-transforms li a.second{ background-color: #b40303; } .no-transforms li a.last{ background-color: #028b09; } .no-transforms .menu-wrapper li a:hover, .no-transforms .menu-wrapper li a:active, .no-transforms .menu-wrapper li a:focus{ -ms-filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=80); filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=80); } </style> </head> <body> <div class="css-transforms" id="box"> <div class="menu-wrapper"> <ul> <li><a href="#" class="first"><img src="./font-1.png" alt=""><span>彝族音乐图片</span></a></li> <li><a href="#" class="second"><img src="./font-2.png" alt=""><span>彝族音乐理论</span></a></li> <li><a href="#" class="last"><img src="./font-3.png" alt=""><span>彝族音乐</span></a></li> </ul> </div> </div> <script> //为不支持css3的浏览器更换样式 var wrapper = document.getElementById('box'); var supports = (function() { var div = document.createElement('div'), vendors = 'Khtml Ms O Moz Webkit'.split(' '), len = vendors.length; return function(prop) { if ( prop in div.style ) return true; prop = prop.replace(/^[a-z]/, function(val) { return val.toUpperCase(); }); while(len--) { if ( vendors[len] + prop in div.style ) { return true; } } return false; }; })(); if ( !supports('transform') ) { removeClass(wrapper, 'css-transforms'); addClass(wrapper, 'no-transforms'); } function hasClass(obj, cls) { return obj.className.match(new RegExp('(\s|^)' + cls + '(\s|$)')); } function addClass(obj, cls) { if (!this.hasClass(obj, cls)) obj.className += " " + cls; } function removeClass(obj, cls) { if (hasClass(obj, cls)) { var reg = new RegExp('(\s|^)' + cls + '(\s|$)'); obj.className = obj.className.replace(reg, ' '); } } </script> </body> </html>
效果如下:
