使用float属性布局时父元素高度不能自适应的解决方法_html/css

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使用float属性布局时父元素高度不能自适应的解决方法_html/css_WEB-ITnose

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Jun 24, 2016 am 11:28 AM

　　在网页的布局过程中，经常会用到float属性来实现页面的左右布局，但是有个问题就是父元素的高度并不能根据子元素的高度自适应。比如下面这段代码：

<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head>    <title>title</title></head><body>    <div align="center" style="border: 1px solid blue;">        p        <div style="float:left;width:45%;height:200px;border: 1px solid green;">            left        </div>        <div style="float:right;width:45%;height:150px;border: 1px solid red;">right</div>    </div></body></html>

　　在浏览器中查看效果如下：

　　在有些情况下，我们需要父元素能够根据子元素的高度进行自适应，这时候你只需要给父div加个overflow:hidden就可以了。譬如：

<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head>    <title>title</title></head><body>    <div align="center" style="border: 1px solid blue;overflow:hidden;">        p        <div style="float:left;width:45%;height:200px;border: 1px solid green;">            left        </div>        <div style="float:right;width:45%;height:150px;border: 1px solid red;">right</div>    </div></body></html>

　　这样父元素的高度就能根据子元素的高度自适应了。在浏览器中查看效果如下：

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