css中div布局学习（1）-CFANZ编程社区

看完慕课网中的div布局，简单记录一下里面的内容：

1.实现效果：

css中div布局学习（1）_html

上面实现效果主要是考虑如何实现块元素居中的问题，关键代码：

margin: 0 auto;

实现代码：

<!DOCTYPE html>
<html>
  <head>
  
    <meta name="keywords" content="keyword1,keyword2,keyword3">
    <meta name="content-type" content="text/html; charset=UTF-8">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="description" content="this is my page">
    <title>布局aaa</title>
    
    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
  
  <style type="text/css">
  body {
    margin: 0; padding: 0
  }
  .top{height: 100px; background: blue}
  .main{width: 800px; height: 300px; background: #ccc;margin: 0 auto;}
  .foot{width: 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>

2.实现效果：

css中div布局学习（1）_html_02

该效果主要是考虑如何实现在一个已经居中的div中再分出两个div，关键代码（使用浮动）：

<span style="font-size:18px;">height: 500px; float: left;</span>

实现代码：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>布局</title>
  
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    
    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
  
  <style type="text/css">
  body {margin: 0; padding: 0}
  .main{width: 800px; margin: 0 auto;}
  .left{width: 220px; height: 500px; float: left; background: #ccc}
  .right{width: 580px; height: 500px; float: right; background: #ddd}
  </style>
  
  </head>
  
  <body>
  <div class="main">
    <div class="left"></div>
    <div class="right"></div>
  </div>
  </body>
</html>

3.实现一个网页分三块，旁边两块固定宽度，中间一块自由伸缩，实现效果：

css中div布局学习（1）_d3_03

该效果主要考虑如何实现中间这一块的自由伸缩，即即使改变浏览器宽度，内容只会随着改变而换行

关键代码（使用绝对布局）：

<span style="font-size:18px;"> position: absolute;left: 0; top: 0</span>

实现代码：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>布局</title>
  
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    
    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
  
  <style type="text/css">
  body {margin: 0; padding: 0}
  .left{width: 200px; height: 500px; background: #ccc; position: absolute;left: 0; top: 0}
  .middle{height: 500px;background: #999; margin: 0 310px 0 210px}
  .right{width: 300px; height: 500px; background: #ddd; position: absolute;right: 0; top: 0}
  </style>
  
  </head>
  
  <body>
      <div class="left">200px</div>
    <div class="middle">微博微博微博微博微博微博
    微博微博微博微博微博微博微博微博微博微博
    微博微博微博微博微博微博微博</div>
    <div class="right">300px</div>
    
  </body>
</html>

4.以下是三个例子：

a.实现效果：

css中div布局学习（1）_html_04

实现代码：

<!DOCTYPE html>
<html>
  <head>
  
    <meta name="keywords" content="keyword1,keyword2,keyword3">
    <meta name="content-type" content="text/html; charset=UTF-8">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="description" content="this is my page">
    <title>布局aaa</title>
    
    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
  
  <style type="text/css">
  body {
    margin: 0; padding: 0
  }
  .top{height: 100px; background: blue}
  .head{height: 100px; width: 800px; background: #f60; margin: 0 auto;}
  .main{width: 800px; height: 600px; background: #ccc;margin: 0 auto;}
  .foot{width: 800px; height: 100px; background: #900; margin: 0 auto;}
  .left{width: 200px; height: 600px; background: yellow; float: left;}
  .right{width: 600px; height: 600px; background: #369; float: left;}
  .sub_l{width: 400px; height: 600px; background: green; float: left}
  .sub_r{width: 200px; height: 600px; background: #09f; float: left}
  
  
  </style>
  
  </head>
  
  <body>
    <div class="top">
      <div class="head"></div>
    </div>
    <div class="main">
      <div class="left"></div>
      <div class="right">
        <div class="sub_l"></div>
        <div class="sub_r"></div>
      </div>
    </div>
    <div class="foot"></div>
  </body>
</html>

2.实现效果：

css中div布局学习（1）_html_05

实现代码：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>混合布局</title>
<style>
body{ margin:0; padding:0; font-size:30px; font-weight:bold}
div{ text-align:center; line-height:50px}
.top{ height:100px;background:#9CF}
.head,.main{ width:960px; margin:0 auto;}
.head{ height:100px; background:#F90}
.left{ width:220px; height:600px; background:#ccc; float:left;}
.right{ width:740px; height:600px;background:#FCC; float:right}
.r_sub_left{ width:540px; height:600px; background:#9C3; float:left}
.r_sub_right{ width:200px; height:600px; background:#9FC; float:left;}
.footer{ height:50px; background:#9F9; clear:both;}
</style>
</head>

<body>
<div class="top">
    <div class="head">head</div>
</div>
<div class="main">
    <div class="left">left</div>
    <div class="right">
        <div class="r_sub_left">sub_left
        </div>
        <div class=" r_sub_right">sub_right
        </div>
    </div>
</div>
<div class="footer">footer</div>
</body>
</html>

c.实现效果：

css中div布局学习（1）_d3_06

实现代码：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>混合布局编程挑战</title>
<style type="text/css">
body{ margin:0; padding:0; font-size:30px; color:#fff}
.top{background-color:#ccc; margin:0 auto; height:100px;}
.main{background-color:red;height:500px;}
.left{ width:200px; background-color:blue;height:500px; position:absolute; top:100px; left 0;}
.right{background-color:green; height:500px; margin-left:220px;}
.foot{background-color:orange; margin:0 auto; height:50px;clear:both;}
</style>

</head>

<body>
<div class="top">top</div>
<div class="main">
    <div class="right">right</div>
    <div class="left">left</div>
</div>
<div class="foot">foot</div>

</body>
</html>