一列布局使用
三个div
分别为上中下,分别设置每一个的高度和宽度以及背景颜色
居中效果的代码是margin:0 auto
,意思是上下的宽度设置为0,左右的宽度设置为auto
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8"/>
<title>1列布局</title>
<style type="text/css">
body{
margin: 0;
padding: 0
}
.main{
800px;
height: 300px;
background: #ccc;
margin: 0 auto;
}
.top{
height: 100px;
background: blue;
}
.foot{
800px;
height: 100px;
background: #900;
margin: 0 auto;
}
</style>
</head>
<body>
<div class="top"></div>
<div class="main"></div>
<div class="foot"></div>
</body>
</html>
两列布局使用
一个大的div
,包含两个浮动于左右的div
,float:left
和float:right
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>2列布局</title>
<style type="text/css">
body{margin: 0;padding: 0}
.main{margin: 0 auto; 800px;}
.left{ 200px;height: 500px;float: left;background: red}
.right{ 520px;height: 500px;float: right;background: yellow}
</style>
</head>
<body>
<div class="main">
<div class="left"></div>
<div class="right"></div>
</div>
</body>
</html>
三列布局使用
三列布局有两种方式,第一种是通过设置三列的width:33.33%
第二种是绝对布局,左右都设置为position:absolute
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>3列布局</title>
<style type="text/css">
body{margin: 0;padding: 0}
.main{margin: 0 auto; 800px;}
.left{ 200px;height: 500px;background: red;position: absolute;left: 0;top: 0}
.middle{height: 500px;background: green;margin: 0 310px 0 210px}
.right{ 300px;height: 500px;background: yellow;position: absolute;right: 0;top: 0}
</style>
</head>
<body>
<div class="left">200px</div>
<div class="middle">middle</div>
<div class="right">300px</div>
</body>
</html>
混合布局的使用
上下自动居中,中间使用浮动在左右
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8"/>
<title>1列布局</title>
<style type="text/css">
body{
margin: 0;
padding: 0
}
.main{
800px;
height: 300px;
background: #ccc;
margin: 0 auto;
}
.left{
200px;
height: 300px;
background: yellow;
float: left;
}
.right{
600px;
height: 300px;
background: red;
float: right;
}
.top{
height: 100px;
800px;
background: blue;
margin: 0 auto;
text-align: center;
vertical-align: middle;
}
.foot{
800px;
height: 100px;
background: #900;
margin: 0 auto;
}
</style>
</head>
<body>
<div class="top">top</div>
<div class="main">
<div class="left">left</div>
<div class="right">right</div>
</div>
<div class="foot">foot</div>
</body>
</html>