CSS三列布局 - 小火柴的蓝色理想

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目录

两侧定宽中间自适应 两列定宽一侧自适应 中间定宽两侧自适应一侧定宽两列自适应三列自适应总结

前面的话

　　前面已经介绍过单列定宽单列自适应和两列自适应的两列布局。本文介绍三列布局，分为两侧定宽中间自适应、两列定宽一侧自适应、中间定宽两侧自适应、一侧定宽两列自适应和三列自适应这五种情况

两侧定宽中间自适应布局

思路一: float

【1】float + margin + calc

style>
p{margin: 0;}
.parent{overflow: hidden;}
.left,.right{float: left;width: 100px;}
.center{float: left; width:calc(100% - 240px);margin: 0 20px;}
style>

div class="parent" style="background-color: lightgrey;">
    div class="left" style="background-color: lightblue;">
        p>leftp>
    div>    
    div class="center" style="background-color: pink;">
        p>centerp>
        p>centerp>
    div>    
    div class="right"  style="background-color: lightgreen;">
        p>rightp>
    div>        
div>

【2】float + margin + (fix)

style>
p{margin: 0;}
.parent{overflow: hidden;}
.left,.right{position: relative;float: left;width: 100px;}
.centerWrap{float: left; width:100%; margin: 0 -100px;}
.center{margin: 0 120px;}
style>

div class="parent" style="background-color: lightgrey;">
    div class="left" style="background-color: lightblue;">
        p>leftp>
    div>            
    div class="centerWrap" style="background-color: red;">
        div class="center" style="background-color: pink;">
            p>centerp>
            p>centerp>
        div>        
    div>
    div class="right"  style="background-color: lightgreen;">
        p>rightp>
    div>            
div>

思路二: inline-block

【1】inline-block + margin + calc

style>
p{margin: 0;}
.parent{font-size: 0;}
.left,.right,.center{display:inline-block; vertical-align: top;font-size: 16px;}
.left,.right{width: 100px;}
.center{width: calc(100% - 240px); margin: 0 20px;}
style>

div class="parent" style="background-color: lightgrey;">
    div class="left" style="background-color: lightblue;">
        p>leftp>
    div>            
    div class="center" style="background-color: pink;">
        p>centerp>
        p>centerp>
    div>        
    div class="right"  style="background-color: lightgreen;">
        p>rightp>
    div>            
div>

【2】inline-block + margin + (fix)

style>
p{margin: 0;}
.parent{font-size: 0;}
.left,.right,.centerWrap{display:inline-block; vertical-align: top;font-size: 16px;}
.left,.right{width: 100px;position:relative;}
.centerWrap{width: 100%; margin: 0 -100px;}
.center{margin: 0 120px;}
style>

div class="parent" style="background-color: lightgrey;">
    div class="left" style="background-color: lightblue;">
        p>leftp>
    div>    
    div class="centerWrap" style="background-color: orange;">
        div class="center" style="background-color: pink;">
            p>centerp>
            p>centerp>
        div>        
    div>        
    div class="right"  style="background-color: lightgreen;">
        p>rightp>
    div>            
div>

思路三: table

style>
p{margin: 0;}
.parent{display: table; width: 100%;table-layout: fixed;}
.left,.right,.centerWrap{display:table-cell;}
.left,.right{width: 100px;}
.center{margin: 0 20px;}
style>

div class="parent" style="background-color: lightgrey;">
    div class="left" style="background-color: lightblue;">
        p>leftp>
    div>    
    div class="centerWrap" style="background-color: orange;">
        div class="center" style="background-color: pink;">
            p>centerp>
            p>centerp>
        div>        
    div>        
    div class="right"  style="background-color: lightgreen;">
        p>rightp>
    div>            
div>

思路四: absolute

style>
p{margin: 0;}
.parent{position: relative;height:40px;}
.left,.right,.center{position: absolute;}
.left{left: 0;width:100px;}
.right{right: 0;width: 100px;}
.center{left: 120px; right: 120px;}
style>

div class="parent" style="background-color: lightgrey;">
    div class="left" style="background-color: lightblue;">
        p>leftp>
    div>    
    div class="center" style="background-color: pink;">
        p>centerp>
        p>centerp>
    div>                
    div class="right"  style="background-color: lightgreen;">
        p>rightp>
    div>            
div>

思路五: flex

style>
p{margin: 0;}
.parent{display: flex;}
.left,.right{width: 100px;}
.center{flex: 1; margin: 0 20px;}
style>

div class="parent" style="background-color: lightgrey;">
    div class="left" style="background-color: lightblue;">
        p>leftp>
    div>    
    div class="center" style="background-color: pink;">
        p>centerp>
        p>centerp>
    div>                
    div class="right"  style="background-color: lightgreen;">
        p>rightp>
    div>            
div>

两列定宽一侧自适应布局

　　这种布局与单列定宽单列自适应布局非常相似

思路一: float

【1】float + margin

　　缺点是IE6-浏览器的3px的bug，以及当自适应列中有元素清除浮动时，会使该元素不与左侧浮动元素同行，从而出现文字下沉现象

style>
p{margin: 0;}
.parent{overflow: hidden;}
.left,.center{float: left;width: 100px;margin-right: 20px;}
.right{margin-left: 240px;}
style>

div class="parent" style="background-color: lightgrey;">
    div class="left" style="background-color: lightblue;">
        p>leftp>
    div>    
    div class="center" style="background-color: pink;">
        p>centerp>
    div>                
    div class="right"  style="background-color: lightgreen;">
        p>rightp>
        p>rightp>
    div>            
div>

【2】float + margin + calc

style>
p{margin: 0;}
.parent{overflow: hidden;}
.left,.center{float: left;width: 100px;margin-right: 20px;}
.right{float: left; width: calc(100% - 240px);}
style>

div class="parent" style="background-color: lightgrey;">
    div class="left" style="background-color: lightblue;">
        p>leftp>
    div>    
    div class="center" style="background-color: pink;">
        p>centerp>
    div>                
    div class="right"  style="background-color: lightgreen;">
        p>rightp>
        p>rightp>
    div>            
div>

【3】float + margin + (fix)

style>
p{margin: 0;}
.parent{overflow: hidden;}
.left,.center{position: relative; float: left;width: 100px;margin-right: 20px;}
.rightWrap{float: left; width: 100%; margin-left: -240px;}
.right{margin-left:微信
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