为什么我的Div中心本身不在其父中心? [英] Why won't my Div center itself in its parent?
问题描述
我正在为网站制作标题栏。此标题栏包含3个部分:后退按钮,学校信息和登录按钮。问题在于中心div(学校信息)将不会居中。我已经尝试了所有我知道该怎么做的方法,但没有任何效果。
这是我的HTML和CSS:
/ *-按钮栏-* /。buttonbarframe {width:100%;背景颜色:#F1F1F1;边框底部:1像素实线#D5D5D5;框阴影:1px 1px 2px#D5D5D5;位置:固定左:0;正确:0;最高:0; / *高度:65像素; * /高度:45像素; padding:10px 0px 10px 0px;} / *#buttonbar {width:100%;高度:45像素; padding:10px 0px 10px 0px;} * /。buttonbarspan {高度:100%;}。buttonbarspanindex {width:继承;高度:100%; margin:0px;}#buttonbarschoolimage {display:block;向左飘浮;垂直对齐:中间;高度:44像素;边框:1像素,实心#D5D5D5;}#buttonbarschoolname {显示:块;填充:0px;页边距:4px;文字对齐:左;垂直对齐:中间; float:left;}。buttonbarrightbutton {display:block; float:right;}。buttonbarsycamorelogo {margin:0 auto;显示:块;文本对齐:居中;垂直对齐:中间; height:44px;}。schoolstuff {display:inline-block;保证金:0自动;文本对齐:居中;垂直对齐:中间;宽度:341像素;}。rightbutton {float:right;}。leftbutton {float:left;}
< div class ='buttonbarframe'> < div class =左键按钮栏> < a class ='backbutton btn btn-large btn-danger'href ='’>< i class ='icon-white icon-arrow-left'>< / i>注销< / a> < / div> < div class =学校的东西按钮栏> < img id ='buttonbarschoolimage'src ='/ Schools / $ EntityValue / logo'> < h2 id = buttonbarschoolname>三县学校< / h2> < / div> < div class =右键按钮栏范围> < input type ='submit'class ='buttonbarrightbutton btn btn-large btn-primary'href ='parentcheckin.php'value ='Login'> < / div>< / div>
问题的示例。
问题的图片。 http://www.overclock.net/image/id/6330507/width/900/height/900/flags/LL
在父div上放置 text-align:center
将解决此问题。您现在拥有的内容将在div中应已居中的文本居中。
请参阅: http://jsfiddle.net/AJmSw/
内联块元素的位置将基于父容器文本的对齐方式。
或者从
display:inline-block
规则, center div将允许 margin:0 auto;
生效,并且还将div 居中,请参见: http://jsfiddle.net/b4mWU/
I am making a header bar for a website. This header bar consists of 3 parts: The Back Button, The School Information, and The Login Button. The problem is that the center div, the School Information, will not center itself. I've tried everything I know how to do and nothing works.
Here is my HTML and CSS:
/* -- Button Bar -- */
.buttonbarframe {
width: 100%;
background-color: #F1F1F1;
border-bottom: 1px solid #D5D5D5;
box-shadow: 1px 1px 2px #D5D5D5;
position: fixed;
left: 0;
right: 0;
top: 0;
/*height: 65px;*/
height: 45px;
padding: 10px 0px 10px 0px;
}
/*#buttonbar {
width: 100%;
height: 45px;
padding: 10px 0px 10px 0px;
}*/
.buttonbarspan {
height: 100%;
}
.buttonbarspanindex {
width: inherit;
height: 100%;
margin: 0px;
}
#buttonbarschoolimage {
display: block;
float: left;
vertical-align: middle;
height: 44px;
border: 1px solid #D5D5D5;
}
#buttonbarschoolname {
display: block;
padding: 0px;
margin-top: 4px;
text-align: left;
vertical-align: middle;
float: left;
}
.buttonbarrightbutton {
display: block;
float: right;
}
.buttonbarsycamorelogo {
margin: 0 auto;
display: block;
text-align: center;
vertical-align: middle;
height: 44px;
}
.schoolstuff {
display: inline-block;
margin: 0 auto;
text-align: center;
vertical-align: middle;
width: 341px;
}
.rightbutton {
float: right;
}
.leftbutton {
float: left;
}
<div class='buttonbarframe'>
<div class='leftbutton buttonbarspan'>
<a class='backbutton btn btn-large btn-danger' href=''><i class='icon-white icon-arrow-left'></i> Logout</a>
</div>
<div class='schoolstuff buttonbarspan'>
<img id='buttonbarschoolimage' src='/Schools/$EntityValue/logo'>
<h2 id='buttonbarschoolname'>Tri-County School</h2>
</div>
<div class='rightbutton buttonbarspan'>
<input type='submit' class='buttonbarrightbutton btn btn-large btn-primary' href='parentcheckin.php' value='Login'>
</div>
</div>
Here is an example of the problem.
Image of the problem. http://www.overclock.net/image/id/6330507/width/900/height/900/flags/LL
Putting text-align: center
on the parent div will fix this issue. What you have right now centers the text in the div which should already be centered.
see: http://jsfiddle.net/AJmSw/
Inline-block elements will be positioned based on the parent containers text align. With both your side divs floating this will work fine.
Alternatively removing the display: inline-block
rule from the center div will allow the margin: 0 auto;
to take effect also centering the div
see: http://jsfiddle.net/b4mWU/
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