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Use CSS DIV to layout (reference)_html/css_WEB-ITnose

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Release: 2016-06-24 12:33:27
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Table来定位,还不快试试CSS+DIV,非常利害的.
常用DIV+CSS网页制作布局技术技巧

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来源: 时间:06-09-11 02:35:22 点击:807 点击这里收藏本文
CSS布局常用的方法:float:none|left|right
取值:
none:?默认值。对象不飘浮
left:?文本流向对象的右边
right:?文本流向对象的左边

它是怎样工作的,看个一行两列的例子
xhtml代码:
以下是引用片段:


这里是第一列

这里是第二列

/*这是违背web标准意图的,只是想说明在它下面的元素需要清除浮动*/

 
CSS代码:
以下是引用片段:
#wrap{width:100;height:auto;}
#column1{float:left;width:40;}
#column2{float:right;width:60;}
.clear{clear:both;}


position:static|absolute|fixed|relative
取值:
static:?默认值。无特殊定位,对象遵循HTML定位规则
absolute:?将对象从文档流中拖出,使用left,right,top,bottom等属性相对于其最接近的一个最有定位设置的父对象进行绝对定位。如果不存在这样的父对象,则依据body对象。而其层叠通过z-index属性定义
fixed:?未支持。对象定位遵从绝对(absolute)方式。但是要遵守一些规范
relative:?对象不可层叠,但将依据left,right,top,bottom等属性在正常文档流中偏移位置

它来实现一行两列的例子
xhtml代码:
以下是引用片段:


这里是第一列

这里是第二列


 
CSS代码:
以下是引用片段:
#wrap{position:relative;/*相对定位*/width:770px;}
#column1{position:absolute;top:0;left:0;width:300px;}
#column2{position:absolute;top:0;right:0;width:470px;} 

他们的区别在哪?
显然,float是相对定位的,会随着浏览器的大小和分辨率的变化而改变,而position就不行了,所以一般情况下还是float布局!

CSS常用布局实例

单行一列
以下是引用片段:
body{margin:0px;padding:0px;text-align:center;}
#content{margin-left:auto;margin-right:auto;width:400px;} 

两行一列
以下是引用片段:
body{margin:0px;padding:0px;text-align:center;}
#content-top{margin-left:auto;margin-right:auto;width:400px;}
#content-end{margin-left:auto;margin-right:auto;width:400px;} 

三行一列
以下是引用片段:
body{margin:0px;padding:0px;text-align:center;}
#content-top{margin-left:auto;margin-right:auto;width:400px;width:370px;}
#content-mid{margin-left:auto;margin-right:auto;width:400px;}
#content-end{margin-left:auto;margin-right:auto;width:400px;}


单行两列
以下是引用片段:
#bodycenter{width:700px;margin-right:auto;margin-left:auto;overflow:auto;}
#bodycenter#dv1{float:left;width:280px;}
#bodycenter#dv2{float:right;width:420px;} 


两行两列
以下是引用片段:
#header{width:700px;margin-right:auto;margin-left:auto;overflow:auto;}
#bodycenter{width:700px;margin-right:auto;margin-left:auto;overflow:auto;}
#bodycenter#dv1{float:left;width:280px;}
#bodycenter#dv2{float:right;width:420px;} 


三行两列
以下是引用片段:
#header{width:700px;margin-right:auto;margin-left:auto;}
#bodycenter{width:700px;margin-right:auto;margin-left:auto;}
#bodycenter#dv1{float:left;width:280px;}
#bodycenter#dv2{float:right;width:420px;}
#footer{width:700px;margin-right:auto;margin-left:auto;overflow:auto;clear:both;} 

单行三列

绝对定位

以下是引用片段:
#left{position:absolute;top:0px;left:0px;width:120px;}
#middle{margin:0px190px0px190px;}
#right{position:absolute;top:0px;right:0px;width:120px;} 


float定位
xhtml代码:
以下是引用片段:



这里是第一列

这里是第二列

/* Usage is not recommended by web standards, but remember that the following elements need to be cleared of floating */

This is the third column

/*Usage is not recommended by web standards, but remember that the following elements need to be cleared*/

CSS code:
The following is the quoted fragment:
#wrap{width:100;height:auto;}
#column{float:left;width:60;}
#column1{float:left;width:30; }
#column2{float:right;width:30;}
#column3{float:right;width:40;}
.clear{clear:both;}

float positioning 2.
xhtml code:
The following is the quotation fragment:


Thisisthemaincontent.




Thisistheleftsidebar.



< div id="right" class="column">

Thisistherightsidebar.



CSS code:
The following is a quote fragment:
body{
margin:0;
padding-left:200px;/*LCfullwidth*/
padding-right:190px;/*RCfullwidth CCpadding*/
min-width:200px;/ *LCfullwidth CCpadding*/
}
.column{
position:relative;
float:left;
}
#center{
width:100;
}
#left{
width:200px;/*LCwidth*/
right:200px;/*LCfullwidth*/
margin-left:-100;
}
#right{
width:190px;/*RCwidth*/
margin-right:-100;
}

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