CSS 常见两列布局三列布局

Posted 2022-01-11 hongchenzimo

一、两列布局：

　方法一：采用position：absollute;并设置margin-left的值。

#left
    position:absolute;
    width:300px;
    top:0px;
    left:0px;
    background:#F00;


#right
    background:#0FC;
    margin-left:300px;

<div id="left">左边定宽</div> <div id="right">右边自适应</div>

方法二：采用float;并设置overflow:auto;(隐藏溢出的内容)　

#left 
    float: left;
    width: 300px;
    background-color: blue;

#right 
    overflow: auto;
    background-color: red;


<div id="left">左边自适应</div>
<div id="right">右边定宽</div>

方法三：使用flex布局的写法

.content
    display:flex;

.aside.left
    border:5px solid black;
    width:200px;

.aside.main
    flex-grow:1;
    border:5px solid red;

.aside 
    height:600px;

<div class="content">
    <div class="aside left"></div>
    <div class="aside main"></div>
</div>

二、三列布局

 方法一：与两列布局类似，左右两边设置position：absolute；和top:0;left:0;right:0;

                 中间设置margin-left和margin-right即可.

*
    padding:0px;
    margin:0px;

#left,#right
    position:absolute;
    width: 300px;
    top:0;
    background-color: #0FC;

#left
    left:0;

#right
    right:0;

#main
    margin:0 300px;
    background-color:#999;


<div id="left">左边定宽</div>
<div id="main">中间自适应</div>
<div id="right">右边定宽</div>

方法二：左右采用float,中间设置 overflow:auto;和margin:0 300px;

*
    padding:0px;
    margin:0px;

#left,#right
    float:left;
    width: 300px;
    background-color: #0FC;

#right
    overflow:auto;
    float:right;

#main
    margin:0 300px;
    background-color:#999;


<div id="left">左边定宽</div>
<div id="right">右边定宽</div>
<div id="main">中间自适应</div>

方法三：使用flex布局的写法

.content
    display:flex;

.aside.left
    order:1;
    border:5px solid black;
    width:200px;

.aside.left
    order:3;
    border:5px solid black;
    width:200px;

.aside.main
    order:2;
    flex-grow:1;
    border:5px solid red;

.aside 
    height:600px;

<div class="content">
    <div class="aside left"></div>
    <div class="aside right"></div>
    <div class="aside main"></div>
</div>