css中div布局学习（1）

来源：互联网发布：it技术学校编辑：程序博客网时间：2024/06/08 00:58

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：

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：

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：

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：

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：

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：

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>

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