CSS實現等分布局的4種方式

等分布局是指子元素平均分配父元素寬度的布局方式，本文將介紹實現等分布局的4種方式

思路一: float

缺點:結構和樣式存在耦合性，IE7-瀏覽器下對寬度百分比取值存在四舍五入的誤差

【1】float + padding + background-clip

使用padding來實現子元素之間的間距，使用background-clip使子元素padding部分不顯示背景

CSS Code復制內容到剪貼板

<style>   
body,p{margin: 0;}   
.parentWrap{   
    overflow: hidden;   
}   
.parent{   
    margin-right: -20px;   
    overflow: hidden;   
}   
.child{   
    float: left;   
    height: 100px;   
    width: 25%;   
    padding-right: 20px;   
    box-sizing: border-box;   
    background-clip: content-box;   
}   
</style>   
  
XML/HTML Code復制內容到剪貼板
<div class="parentWrap">  
    <div class="parent" style="background-color: lightgrey;">  
        <div class="child" style="background-color: lightblue;">1</div>  
        <div class="child" style="background-color: lightgreen;">2</div>  
        <div class="child" style="background-color: lightsalmon;">3</div>  
        <div class="child" style="background-color: pink;">4</div>                   
    </div>       
</div> 

【2】float + margin + calc

使用margin實現子元素之間的間距，使用calc()函數計算子元素的寬度

CSS Code復制內容到剪貼板

<style>   
body,p{margin: 0;}   
.parentWrap{   
    overflow: hidden;   
}   
.parent{   
    overflow: hidden;   
    margin-right: -20px;   
}   
.child{   
    float: left;   
    height: 100px;   
    width: calc(25% - 20px);   
    margin-right: 20px;   
}   
</style>  
XML/HTML Code復制內容到剪貼板
<div class="parentWrap">  
    <div class="parent" style="background-color: lightgrey;">  
        <div class="child" style="background-color: lightblue;">1</div>  
        <div class="child" style="background-color: lightgreen;">2</div>  
        <div class="child" style="background-color: lightsalmon;">3</div>  
        <div class="child" style="background-color: pink;">4</div>                   
    </div>       
</div>  

【3】float + margin + (fix)

使用margin實現子元素之間的間距，通過增加結構來實現兼容

CSS Code復制內容到剪貼板

<style>   
body,p{margin: 0;}   
.parentWrap{   
    overflow: hidden;   
}   
.parent{   
    overflow: hidden;   
    margin-right: -20px;   
}   
.child{   
    float: left;   
    width: 25%;   
}   
.in{   
    margin-right: 20px;   
    height: 100px;   
}   
</style>   
  
XML/HTML Code復制內容到剪貼板
<div class="parentWrap">  
    <div class="parent" style="background-color: lightgrey;">  
        <div class="child" style="background-color: blue;">  
            <div class="in" style="background-color: lightblue;">1</div>  
        </div>  
        <div class="child" style="background-color: green;">  
            <div class="in" style="background-color: lightgreen;">2</div>  
        </div>  
        <div class="child" style="background-color: orange;">  
            <div class="in" style="background-color: lightsalmon;">3</div>  
        </div>  
        <div class="child" style="background-color: red;">  
            <div class="in" style="background-color: pink;">4</div>  
        </div>                   
    </div>       
</div>  

思路二: inline-block

缺點：需要設置垂直對齊方式vertical-align，則需要處理換行符解析成空格的間隙問題。IE7-瀏覽器不支持給塊級元素設置inline-block屬性，兼容代碼是display:inline;zoom:1;

【1】inline-block + padding + background-clip

CSS Code復制內容到剪貼板

<style>   
body,p{margin: 0;}   
.parentWrap{   
    overflow: hidden;   
}   
.parent{   
    font-size: 0;   
    margin-right: -20px;   
    overflow: hidden;   
}   
.child{   
    display:inline-block;   
    vertical-align: top;   
    width: 25%;   
    padding-right: 20px;   
    box-sizing: border-box;   
    background-clip: content-box;   
    font-size: 16px;   
}   
</style>   
  
XML/HTML Code復制內容到剪貼板
<div class="parentWrap">  
    <div class="parent" style="background-color: lightgrey;">  
        <div class="child" style="background-color: lightblue;">1</div>  
        <div class="child" style="background-color: lightgreen;">2</div>  
        <div class="child" style="background-color: lightsalmon;">3</div>  
        <div class="child" style="background-color: pink;">4</div>                   
    </div>       
</div>  
  

【2】inline-block + margin + calc

CSS Code復制內容到剪貼板

<style>   
body,p{margin: 0;}   
.parentWrap{   
    overflow: hidden;   
}   
.parent{   
    margin-right: -20px;   
    font-size: 0;   
}   
.child{   
    display: inline-block;   
    vertical-align: top;   
    font-size: 16px;   
    height: 100px;   
    width: calc(25% - 20px);   
    margin-right: 20px;   
}   
</style>   
  
XML/HTML Code復制內容到剪貼板
<div class="parentWrap">  
    <div class="parent" style="background-color: lightgrey;">  
        <div class="child" style="background-color: lightblue;">1</div>  
        <div class="child" style="background-color: lightgreen;">2</div>  
        <div class="child" style="background-color: lightsalmon;">3</div>  
        <div class="child" style="background-color: pink;">4</div>                   
    </div>       
</div>  

【3】inline-block + margin + (fix)

CSS Code復制內容到剪貼板

<style>   
body,p{margin: 0;}   
.parentWrap{   
    overflow: hidden;   
}   
.parent{   
    margin-right: -20px;   
    font-size: 0;   
}   
.child{   
    display: inline-block;   
    vertical-align: top;   
    font-size: 16px;   
    width: 25%;   
}   
.in{   
    margin-right: 20px;   
    height: 100px;   
}   
</style>   
  
XML/HTML Code復制內容到剪貼板
<div class="parentWrap">  
    <div class="parent" style="background-color: lightgrey;">  
        <div class="child" style="background-color: blue;">  
            <div class="in" style="background-color: lightblue;">1</div>  
        </div>  
        <div class="child" style="background-color: green;">  
            <div class="in" style="background-color: lightgreen;">2</div>  
        </div>  
        <div class="child" style="background-color: orange;">  
            <div class="in" style="background-color: lightsalmon;">3</div>  
        </div>  
        <div class="child" style="background-color: red;">  
            <div class="in" style="background-color: pink;">4</div>  
        </div>                   
    </div>       
</div>  
  

思路三: table

缺點：元素被設置為table后，內容撐開寬度。若要兼容IE7-瀏覽器，需要改為結構。table-cell元素無法設置margin，設置padding及background-clip也不可行

【1】table + margin負值

CSS Code復制內容到剪貼板

<style>   
body,p{margin: 0;}   
.parentWrap{   
    overflow: hidden;   
}   
.parent{   
    display: table;   
    width: calc(100% + 20px);   
    table-layout: fixed;   
}   
.child{   
    display: table-cell;   
    height: 100px;   
    padding-right: 20px;   
}   
</style>   
  
XML/HTML Code復制內容到剪貼板
<div class="parentWrap">  
    <div class="parent" style="background-color: lightgrey;">  
        <div class="child" style="background-color: blue;">  
            <div class="in" style="background-color: lightblue;">1</div>  
        </div>  
        <div class="child" style="background-color: green;">  
            <div class="in" style="background-color: lightgreen;">2</div>  
        </div>  
        <div class="child" style="background-color: orange;">  
            <div class="in" style="background-color: lightsalmon;">3</div>  
        </div>  
        <div class="child" style="background-color: red;">  
            <div class="in" style="background-color: pink;">4</div>  
        </div>                   
    </div>       
</div>  
    
```javaScript
<img src="https://img.jbzj.com/file_images/article/201605/20165485206182.jpg?20164485212" />
<br/>
【2】table + 兄弟選擇器

CSS Code復制內容到剪貼板
```javaScript
<style>   
body,p{margin: 0;}   
.parent{   
    display: table;   
    width: 100%;   
    table-layout: fixed;   
}   
.child{   
    display: table-cell;   
    height: 100px;   
}   
.child + .child{   
    padding-left: 20px;   
}   
</style>   
  
XML/HTML Code復制內容到剪貼板
<div class="parent" style="background-color: lightgrey;">  
    <div class="child" style="background-color: blue;">  
        <div class="in" style="background-color: lightblue;">1</div>  
    </div>  
    <div class="child" style="background-color: green;">  
        <div class="in" style="background-color: lightgreen;">2</div>  
    </div>  
    <div class="child" style="background-color: orange;">  
        <div class="in" style="background-color: lightsalmon;">3</div>  
    </div>  
    <div class="child" style="background-color: red;">  
        <div class="in" style="background-color: pink;">4</div>  
    </div>                   
</div>       
    

思路四: flex

CSS Code復制內容到剪貼板

<style>   
body,p{margin: 0;}   
.parent{   
    display: flex;   
}   
.child{   
    flex:1;   
    height: 100px;   
}   
.child + .child{   
    margin-left: 20px;   
}   
</style>   
  
XML/HTML Code復制內容到剪貼板
<div class="parent" style="background-color: lightgrey;">  
    <div class="child" style="background-color: lightblue;">1</div>  
    <div class="child" style="background-color: lightgreen;">2</div>  
    <div class="child" style="background-color: lightsalmon;">3</div>  
    <div class="child" style="background-color: pink;">4</div>                   
</div>     
  

以上就是本文的全部內容，希望對大家的學習有所幫助。

本文鏈接：http://www.cnblogs.com/xiaohuochai/p/5456695.html