CSS区块浮动
这种块移动直到该区块的外边缘碰到碰到它的区块边框或浮动区块为止
1.浮动的设置
在CSS中可以使用float属性设置区块框向左或向右浮动
代码
1 <!doctype html> 2 <html> 3 <head> 4 <meta charset = "UTF-8"> 5 <title></title> 6 <style type="text/css"> 7 #one{ 8 margin: 100px 350px; 9 width: 400px; 10 height: 400px; 11 border:1px dashed black; 12 background-color: #ABCDEF; 13 } 14 .one{ 15 margin: 2px; 16 width: 100px; 17 height: 100px; 18 border: 1px solid black; 19 text-align: center; 20 padding: 20px; 21 float: right; 22 background-color: #f00; 23 } 24 .two{ 25 margin: 2px; 26 width: 100px; 27 height: 100px; 28 border: 1px solid black; 29 text-align: center; 30 padding: 20px; 31 background-color: #0f0; 32 } 33 .three{ 34 margin: 2px; 35 width: 100px; 36 height: 100px; 37 border: 1px solid black; 38 text-align: center; 39 padding: 20px; 40 background-color: #00f; 41 } 42 </style> 43 </head> 44 <body> 45 <div id = "one"> 46 <div class = "one">块一</div> 47 <div class = "two">块二</div> 48 <div class = "three">块三</div> 49 </div> 50 51 </body> 52 </html>
注意 float
没有用float效果
用float的效果
2.行框和清理
通过CSS样式中的从clear 属性进行清除浮动
代码：
1 <!doctype html> 2 <html> 3 <head> 4 <meta charset = "UTF-8"> 5 <title></title> 6 <style type="text/css"> 7 #one{ 8 margin: 100px 350px; 9 width: 350px; 10 height: 350px; 11 border:1px dashed black; 12 background-color: #ABCDEF; 13 } 14 .one{ 15 margin: 2px; 16 width:100px; 17 height: 100px; 18 border: 1px solid black; 19 text-align: center; 20 padding: 20px; 21 float: right; 22 background-color: #f00; 23 } 24 .two{ 25 margin: 2px; 26 width: 100px; 27 height: 100px; 28 border: 1px solid black; 29 text-align:center; 30 padding: 20px; 31 float: right; 32 clear: both; 33 background-color: #0f0; 34 } 35 .three{ 36 margin:2px; 37 width:100px; 38 height:100px; 39 border:1px solid black; 40 text-align:center; 41 padding: 20; 42 background-color: #00f; 43 } 44 </style> 45 </head> 46 <body> 47 <div id = "one"> 48 <div class = "one">块一</div> 49 <div class = "two">块二</div> 50 <div class = "three">块三</div> 51 </div> 52 </body> 53 </html>
注意clear
没有用clear的效果
用clear的效果