position: fixed寫在頂層.navbar裏,整個瀏視窗的滾動條就沒了?php
答:由於position:fixed, 脫離了文檔流了,你設置body的最小高度爲設置fixed的元素的高度,就會出現滾動條了spa
<body>
<nav class="navbar navbar-main navbar-fixed-top">
<div class="navbar-container">
<div class="navbar-header">
<a class="navbar-brand-logo" href="/">
<!-- a連接還能裝div??????? -->
<div class="logo-box"></div>
<!-- logo-box的大小能夠裝下logo和機智雲三個字 -->
<span class="logo-font">機智雲</span>
<span class="logo-font logo-desc">智能硬件自助開發及雲服務平臺</span>
</a>
<button class="navbar-toggle">
<i class="fa fa-bars"></i>
</button>
</div>
<!-- .navbar-header end -->
<ul class="navbar-nav navbar-right">
<li class="first"><a href="/">產品服務</a></li>
<li><a target="_blank" href="http://docs.gizwits.com/hc/">開放平臺</a></li>
<li><a target="_blank" href="http://club.gizwits.com/forum.php">社區</a></li>
<li><a href="/news/">新聞活動</a></li>
<li class="last"><a href="/about-us">關於咱們</a></li>
<li class="last dev-center-link-box">
<!-- dev-center-link-box 譯:開發中心連接盒子 -->
<a class="dev-center-link" href="http://site.gizwits.com/zh-cn/developer/">
<div class="content-box">
<div class="ndex-header_dev_icon dev-center-logo"></div>
<span class="dev-center-text">開發者中心</span>
</div>
</a>
</li>
</ul>
<!-- ul.navbar-nav、.navbar-right結束 -->
</div>
<!-- navbar-container結束 -->
</nav>
</body>開發
nav.navbar{
width: 100%;
height: 60px;
background: #000;
position: fixed;
}文檔