css三种布局模式
CSS实现等分布局的4种方式等分布局是指子元素平均分配父元素宽度的布局方式,本文将介绍实现等分布局的4种方式
思路一: float
缺点:结构和样式存在耦合性,IE7-浏览器下对宽度百分比取值存在四舍五入的误差
【1】float + padding + background-clip
使用padding来实现子元素之间的间距,使用background-clip使子元素padding部分不显示背景
- <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>
- <li class="parentWrap">
- <li class="parent" style="background-color: lightgrey;">
- <li class="child" style="background-color: lightblue;">1</li>
- <li class="child" style="background-color: lightgreen;">2</li>
- <li class="child" style="background-color: lightsalmon;">3</li>
- <li class="child" style="background-color: pink;">4</li>
- </li>
- </li>
【2】float + margin + calc
使用margin实现子元素之间的间距,使用calc()函数计算子元素的宽度
- <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>
- <li class="parentWrap">
- <li class="parent" style="background-color: lightgrey;">
- <li class="child" style="background-color: lightblue;">1</li>
- <li class="child" style="background-color: lightgreen;">2</li>
- <li class="child" style="background-color: lightsalmon;">3</li>
- <li class="child" style="background-color: pink;">4</li>
- </li>
- </li>
【3】float + margin + (fix)
使用margin实现子元素之间的间距,通过增加结构来实现兼容
- <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>
- <li class="parentWrap">
- <li class="parent" style="background-color: lightgrey;">
- <li class="child" style="background-color: blue;">
- <li class="in" style="background-color: lightblue;">1</li>
- </li>
- <li class="child" style="background-color: green;">
- <li class="in" style="background-color: lightgreen;">2</li>
- </li>
- <li class="child" style="background-color: orange;">
- <li class="in" style="background-color: lightsalmon;">3</li>
- </li>
- <li class="child" style="background-color: red;">
- <li class="in" style="background-color: pink;">4</li>
- </li>
- </li>
- </li>
思路二: inline-block
缺点:需要设置垂直对齐方式vertical-align,则需要处理换行符解析成空格的间隙问题。IE7-浏览器不支持给块级元素设置inline-block属性,兼容代码是display:inline;zoom:1;
【1】inline-block + padding + background-clip
- <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>
- <li class="parentWrap">
- <li class="parent" style="background-color: lightgrey;">
- <li class="child" style="background-color: lightblue;">1</li>
- <li class="child" style="background-color: lightgreen;">2</li>
- <li class="child" style="background-color: lightsalmon;">3</li>
- <li class="child" style="background-color: pink;">4</li>
- </li>
- </li>
【2】inline-block + margin + calc
- <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>
- <li class="parentWrap">
- <li class="parent" style="background-color: lightgrey;">
- <li class="child" style="background-color: lightblue;">1</li>
- <li class="child" style="background-color: lightgreen;">2</li>
- <li class="child" style="background-color: lightsalmon;">3</li>
- <li class="child" style="background-color: pink;">4</li>
- </li>
- </li>
【3】inline-block + margin + (fix)
- <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>
- <li class="parentWrap">
- <li class="parent" style="background-color: lightgrey;">
- <li class="child" style="background-color: blue;">
- <li class="in" style="background-color: lightblue;">1</li>
- </li>
- <li class="child" style="background-color: green;">
- <li class="in" style="background-color: lightgreen;">2</li>
- </li>
- <li class="child" style="background-color: orange;">
- <li class="in" style="background-color: lightsalmon;">3</li>
- </li>
- <li class="child" style="background-color: red;">
- <li class="in" style="background-color: pink;">4</li>
- </li>
- </li>
- </li>
思路三: table
缺点:元素被设置为table后,内容撑开宽度。若要兼容IE7-浏览器,需要改为<table>结构。table-cell元素无法设置margin,设置padding及background-clip也不可行
【1】table + margin负值
- <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>
- <li class="parentWrap">
- <li class="parent" style="background-color: lightgrey;">
- <li class="child" style="background-color: blue;">
- <li class="in" style="background-color: lightblue;">1</li>
- </li>
- <li class="child" style="background-color: green;">
- <li class="in" style="background-color: lightgreen;">2</li>
- </li>
- <li class="child" style="background-color: orange;">
- <li class="in" style="background-color: lightsalmon;">3</li>
- </li>
- <li class="child" style="background-color: red;">
- <li class="in" style="background-color: pink;">4</li>
- </li>
- </li>
- </li>
【2】table + 兄弟选择器
- <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>
- <li class="parent" style="background-color: lightgrey;">
- <li class="child" style="background-color: blue;">
- <li class="in" style="background-color: lightblue;">1</li>
- </li>
- <li class="child" style="background-color: green;">
- <li class="in" style="background-color: lightgreen;">2</li>
- </li>
- <li class="child" style="background-color: orange;">
- <li class="in" style="background-color: lightsalmon;">3</li>
- </li>
- <li class="child" style="background-color: red;">
- <li class="in" style="background-color: pink;">4</li>
- </li>
- </li>
思路四: flex
- <style>
- body,p{margin: 0;}
- .parent{
- display: flex;
- }
- .child{
- flex:1;
- height: 100px;
- }
- .child + .child{
- margin-left: 20px;
- }
- </style>
- <li class="parent" style="background-color: lightgrey;">
- <li class="child" style="background-color: lightblue;">1</li>
- <li class="child" style="background-color: lightgreen;">2</li>
- <li class="child" 标签: