纯css 实现tab效果

来源：互联网发布：iphone铃声助手 mac 编辑：程序博客网时间：2024/04/30 18:15

原理：
1、radio 与a 重叠，
2、radio zindex属性比a大，
3、radio透明
参考 http://www.imooc.com/video/7144

<html><head>    <style type="text/css">        .nav {            position: fixed;            bottom: 10px;            width: 100%;            height: 50px;        }        input, a {            position: absolute;            width: 20%;            height: 100%;        }        input {            z-index: 100;            opacity: 0;        }        a {            text-decoration:none;            text-align: center;            background: yellow;            line-height: 50px;        }        .nav_item1, .nav_item1 + a {            left: 0%;        }        .nav_item2, .nav_item2 + a {            left: 20%;        }        .nav_item3, .nav_item3 + a {            left: 40%;        }        .nav_item4, .nav_item4 + a {            left: 60%;        }        .nav input:checked + a {            background-color: #ff0000;            font-size: 26px;        }    </style></head><body><div class="nav">    <input type="radio" name="nav_radio" checked="checked" class="nav_item1">    <a href="#">aa</a>    <input type="radio" name="nav_radio" class="nav_item2">    <a href="#">bb</a>    <input type="radio" name="nav_radio" class="nav_item3">    <a href="#">cc</a>    <input type="radio" name="nav_radio" class="nav_item4">    <a href="#">dd</a></div></body></html>

<html><head>    <style type="text/css">        .nav {            position: relative;        }        .nav-item {            display: inline-block;            width: 20%;            height: 50px;            margin-left: 10px;            position: relative;        }        input {            position: absolute;            top: 0px;            left: 0px;            width: 100%;            z-index: 100;            height: 100%;            opacity: 0;        }        a {            position: absolute;            top: 0px;            width: 100%;            height: 100%;            text-align: center;            background: yellow;            line-height: 50px        }        .nav input:checked + a {            background-color: #ff0000;            font-size: 26px;        }    </style></head><body><div class="nav">    <div class="nav-item">        <input type="radio" name="nav_radio" checked="checked">        <a href="#">aa</a>    </div>    <div class="nav-item">        <input type="radio" name="nav_radio">        <a href="#">aa</a>    </div>    <div class="nav-item">        <input type="radio" name="nav_radio">        <a href="#">aa</a>    </div>    <div class="nav-item">        <input type="radio" name="nav_radio">        <a href="#">aa</a>    </div></div></body></html>

html简单，css就要复杂点，
html 复杂，css就能简单点，
html 简单至上，后台人员只要看html，当然结构简单更好，

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