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  • CSS 清除浮动的方法

    代码如下可自行测试:

    方法一:(前提条件: 要知道子元素 内容的高度,然后 按需设置 父元素的高度

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>清除浮动的 方法</title>
        <style type="text/css">
        /* 不清楚浮动 效果 */
        /**/
            .ft-parent { background-color: yellow;  border: 1px dashed red;}
            .ft-l { width: 100px; height: 100px; border:1px solid blue; background-color: #ccc; float: left;  }
            .ft-r { width: 100px; height: 100px; border:1px solid blue; background-color: #ccc; float: right;  }
        
           
        /* 方法一:效果 (条件: 要知道子元素 内容的高度,然后 按需设置 父元素的高度)*/
        /*
            .ft-parent { background-color: yellow;  border: 1px dashed red; height: 102px;}
            .ft-l {  100px; height: 100px; border:1px solid blue; background-color: #ccc; float: left;  }
            .ft-r {  100px; height: 100px; border:1px solid blue; background-color: #ccc; float: right;  }
        */      
    
        </style>
    </head>
    <body>
    
    <div class="ft-parent">
        <div class="ft-l"></div>
        <div class="ft-r"></div>
    </div>
        
    </body>
    </html>

    方法二:(父元素 添加 overflow:hidden;)

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>清除浮动的 方法</title>
        <style type="text/css">
        /* 不清楚浮动 效果 */
        /**/
            .ft-parent { background-color: yellow;  border: 1px dashed red;}
            .ft-l { width: 100px; height: 100px; border:1px solid blue; background-color: #ccc; float: left;  }
            .ft-r { width: 100px; height: 100px; border:1px solid blue; background-color: #ccc; float: right;  }
            
        /* 方法二:效果 */
        /*
            .ft-parent { background-color: yellow;  border: 1px dashed red; overflow: hidden;}
            .ft-l {  100px; height: 100px; border:1px solid blue; background-color: #ccc; float: left;  }
            .ft-r {  100px; height: 100px; border:1px solid blue; background-color: #ccc; float: right;  }
        */    
    
        </style>
    </head>
    <body>
    
    <div class="ft-parent">
        <div class="ft-l"></div>
        <div class="ft-r"></div>
    </div>
        
    </body>
    </html>

    方法三:(在父级“</div>”结束前加此div引入“class="clear"”样式 —> .clear { clear:both;})

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>清除浮动的 方法</title>
        <style type="text/css">
        /* 不清楚浮动 效果 */
        /*
            .ft-parent { background-color: yellow;  border: 1px dashed red;}
            .ft-l {  100px; height: 100px; border:1px solid blue; background-color: #ccc; float: left;  }
            .ft-r {  100px; height: 100px; border:1px solid blue; background-color: #ccc; float: right;  }
        */
           
        /* 方法三:效果 ()*/
        /**/
            .ft-parent { background-color: yellow;  border: 1px dashed red; }
            .ft-l { width: 100px; height: 100px; border:1px solid blue; background-color: #ccc; float: left;  }
            .ft-r { width: 100px; height: 100px; border:1px solid blue; background-color: #ccc; float: right;  }
            .clear { clear: both; }
               
        </style>
    
    </head>
    <body>
    
    <div class="ft-parent">
        <div class="ft-l"></div>
        <div class="ft-r"></div>
        <div class="clear"></div>
    </div>
        
    </body>
    </html>

    方法截图总结:

     

    参考自:http://www.divcss5.com/jiqiao/j406.shtml

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  • 原文地址:https://www.cnblogs.com/cnblogs-jcy/p/6862753.html
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