文章目录
- 一、行高(line-height)法
- 二、内边距(padding)法
- 三、模拟表格法
- 四、CSS3的transform来实现
- 五:css3的box方法实现水平垂直居中
- 六:flex布局(2018/04/17补充)
一、行高(line-height)法
如果要垂直居中的只有一行或几个文字,那它的制作最为简单,只要让文字的行高和容器的高度相同即可,比如:
<pre style="margin: 0px; padding: 0px; transition: background-color 0.2s ease 0s, border-color, border-radius, padding, margin, color, opacity; overflow: auto; font-family: "Courier New"; font-size: 12px !important; overflow-wrap: break-word;">p { height:30px; line-height:30px; width:100px; overflow:hidden; }</pre>
这段代码可以达到让文字在段落中垂直居中的效果。
二、内边距(padding)法
另一种方法和行高法很相似,它同样适合一行或几行文字垂直居中,原理就是利用padding将内容垂直居中,比如:
<pre style="margin: 0px; padding: 0px; transition: background-color 0.2s ease 0s, border-color, border-radius, padding, margin, color, opacity; overflow: auto; font-family: "Courier New"; font-size: 12px !important; overflow-wrap: break-word;">p { padding:20px 0; }</pre>
这段代码的效果和line-height法差不多。
三、模拟表格法
将容器设置为display:table,然后将子元素也就是要垂直居中显示的元素设置为display:table-cell,然后加上vertical-align:middle来实现。
html结构如下:
<pre style="margin: 0px; padding: 0px; transition: background-color 0.2s ease 0s, border-color, border-radius, padding, margin, color, opacity; overflow: auto; font-family: "Courier New"; font-size: 12px !important; overflow-wrap: break-word;"><div id="wrapper">
<div id="cell">
<p>测试垂直居中效果测试垂直居中效果</p>
<p>测试垂直居中效果测试垂直居中效果</p>
</div>
</div></pre>
css代码:
<pre style="margin: 0px; padding: 0px; transition: background-color 0.2s ease 0s, border-color, border-radius, padding, margin, color, opacity; overflow: auto; font-family: "Courier New"; font-size: 12px !important; overflow-wrap: break-word;">#wrapper {display:table;width:300px;height:300px;background:#000;margin:0 auto;color:red;} #cell{display:table-cell; vertical-align:middle;}</pre>
实现如图所示:
image
遗憾的是IE7及以下不支持。
四、CSS3的transform来实现
css代码如下:
[ 复制代码](javascript:void(0); "复制代码")
<pre style="margin: 0px; padding: 0px; transition: background-color 0.2s ease 0s, border-color, border-radius, padding, margin, color, opacity; overflow: auto; font-family: "Courier New"; font-size: 12px !important; overflow-wrap: break-word;">.center-vertical{ position: relative; top:50%; transform:translateY(-50%);
}.center-horizontal{ position: relative; left:50%; transform:translateX(-50%);
}</pre>
](javascript:void(0); "复制代码")
五:css3的box方法实现水平垂直居中
html代码:
[ 复制代码](javascript:void(0); "复制代码")
<pre style="margin: 0px; padding: 0px; transition: background-color 0.2s ease 0s, border-color, border-radius, padding, margin, color, opacity; overflow: auto; font-family: "Courier New"; font-size: 12px !important; overflow-wrap: break-word;"><div class="center">
<div class="text">
<p>我是多行文字</p>
<p>我是多行文字</p>
<p>我是多行文字</p>
</div>
</div></pre>
](javascript:void(0); "复制代码")
css代码:
[ 复制代码](javascript:void(0); "复制代码")
<pre style="margin: 0px; padding: 0px; transition: background-color 0.2s ease 0s, border-color, border-radius, padding, margin, color, opacity; overflow: auto; font-family: "Courier New"; font-size: 12px !important; overflow-wrap: break-word;">.center { width: 300px; height: 200px; padding: 10px; border: 1px solid #ccc; background:#000; color:#fff; margin: 20px auto;
display: -webkit-box; -webkit-box-orient: horizontal; -webkit-box-pack: center; -webkit-box-align: center; display: -moz-box; -moz-box-orient: horizontal; -moz-box-pack: center; -moz-box-align: center; display: -o-box; -o-box-orient: horizontal; -o-box-pack: center; -o-box-align: center; display: -ms-box; -ms-box-orient: horizontal; -ms-box-pack: center; -ms-box-align: center; display: box; box-orient: horizontal; box-pack: center; box-align: center;
}</pre>
](javascript:void(0); "复制代码")
结果如图:
image六:flex布局(2018/04/17补充
)
html代码:
<pre style="margin: 0px; padding: 0px; transition: background-color 0.2s ease 0s, border-color, border-radius, padding, margin, color, opacity; overflow: auto; font-family: "Courier New"; font-size: 12px !important; overflow-wrap: break-word;"><div class="flex">
<div>
<p>我是多行文字我是多行文字我是多行文字我是多行文字</p>
<p>我是多行文字我是多行文字我是多行文字我是多行文字</p>
</div>
</div></pre>
CSS代码:
[ 复制代码](javascript:void(0); "复制代码")
<pre style="margin: 0px; padding: 0px; transition: background-color 0.2s ease 0s, border-color, border-radius, padding, margin, color, opacity; overflow: auto; font-family: "Courier New"; font-size: 12px !important; overflow-wrap: break-word;">.flex{
/flex 布局/ display: flex;
/实现垂直居中/ align-items: center;
/实现水平居中/ justify-content: center; text-align: justify; width:200px; height:200px; background: #000; margin:0 auto; color:#fff;
}</pre>
](javascript:void(0); "复制代码")
实现效果:
image
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