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所以基本上我有這樣的代碼:下面的HTML和CSS,使用bootstrap以及由於某種原因,它不居中。它曾經是,但是在某個時候它已經不在了,現在它向左拉。見下圖。有任何想法嗎?無法正確居中導航欄(使用col-md-3)bootstrap css和html
<div class="row" id="nav-bar">
<div class="col-md-9">
<ul>
<li class="col-md-3 nav-btn" id="home"><a href="index.html">Home</a></li>
<li class="col-md-3 nav-btn" id="about"><a href="about.html">About</a></li>
<li class="col-md-3 nav-btn dropdown-toggle" id="games">
<a href="#">Games & Apps ▼</a>
<div class="dropdown">
<ul>
<li><a href="#" id="games2">Games & Apps ▼</a></li>
<li id="first"><a href="#">Space Rodeo</a></li>
<li id="spaced"><a href="#">Boodya's Carpet Ride</a></li>
<li id="spaced"><a href="#">Ultimate Points Counter</a></li>
</ul>
</div>
</li>
<li class="col-md-3 nav-btn" id="blog"><a href="blog.html">Blog</a></li>
</ul>
</div>
</div>
#nav-bar {
margin: 0px 0px 10px 0px;
height: 60px;
}
#nav-bar ul {
margin-top: 20px;
}
.col-md-3 a {
padding: 15px 40px 15px 40px;
font-size: 20px;
text-decoration: none;
text-align: center;
color: #B6B6B6;
}
#nav-bar a:hover {
color: #428bca;
}
.col-md-3 {
display: inline;
}
.col-md-9 {
float: none;
margin: auto;
left: 0;
right: 0;
}
.dropdown {
padding: 0;
margin-top: -48px;
position: absolute;
z-index: 10;
background-color: #ffffff;
box-shadow: -5px -5px 20px;
border-radius: 5px;
height: 210px;
width: 275px;
}
.dropdown ul {
padding: 0;
margin-top: 0;
}
.dropdown li {
list-style: none;
padding: 0;
width: 310px;
}
#games2 {
color: #428bca;
}
#spaced {
margin-top: 10px;
}
#first {
padding-top: 20px;
border-top: 1px solid black;
margin-top: 22px;
}
顯示的代碼結果,導航欄是偏離中心
http://i.stack.imgur.com/smtTP.png