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纯css 实现tab效果

2015-09-24 11:10 627 查看

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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