6

我试图让我的带有引导程序的导航栏出现在某个名为“A”的 div 之后。div“a”位于页面顶部，高度约为 400px。一旦用户滚动过去 div "a" 和滚动条，我希望滚动条贴在顶部。类似于这样的内容：https ://www.facebook.com/home但顶部没有视频，它是图像。

我们能做到我们自己引导吗？

谢谢！

4

4 回答 4

16

如果您想使用 Twitter 的 Bootstrap 来实现这一点，请查看“Affix”js。您使用“data-offset-top”定义“固定”点，然后当用户向下滚动时，导航栏将固定在顶部。

CSS：

#con .well {
    height:390px;
}

#nav.affix {
    position: fixed;
    top: 0;
    width: 100%
}

HTML：

<div class="container" data-spy="affix" data-offset-top="400" id="nav">
    <div id="nav" class="navbar">
        <div class="navbar-inner"> ...

Javascript：

$('#nav').affix();

这是工作小提琴：http: //jsfiddle.net/skelly/df8tb/

这是一个工作示例（针对 Bootstrap 3 更新）：http ://bootply.com/90936

于 2013-04-05T17:16:58.070 回答
1

要在 facebook.com/home 上显示效果，您的导航栏位置应设置为静态（或相对/绝对），直到用户滚动超过 400 像素，然后您需要将其位置设置为固定，以便保持在顶部屏幕。这可以用一点 javascript 来完成。

于 2013-04-05T16:22:34.990 回答
0

这个答案不再正确。请参阅下面的@zim 答案。

于 2013-04-05T16:25:16.127 回答
0

请按照这个。当菜单栏到达顶部位置时，您将看不到快照。

<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
  <style>
  body {
      position: relative; 
  }
  .affix {
      top:0;
      width: 100%;
      z-index: 9999 !important;
  }
  .navbar {
      margin-bottom: 0px;
  }

  .affix ~ .container-fluid {
     position: relative;
     top: 50px;
  }
  #section1 {padding-top:50px;height:500px;color: #fff; background-color: #1E88E5;}
  #section2 {padding-top:50px;height:500px;color: #fff; background-color: #673ab7;}
  #section3 {padding-top:50px;height:500px;color: #fff; background-color: #ff9800;}
  #section41 {padding-top:50px;height:500px;color: #fff; background-color: #00bcd4;}
  #section42 {padding-top:50px;height:500px;color: #fff; background-color: #009688;}
  </style>
</head>
<body data-spy="scroll" data-target=".navbar" data-offset="50">

<div class="container-fluid" style="background-color:#F44336;color:#fff;height:200px;">
  <h1>Scrollspy & Affix Example</h1>
  <h3>Fixed navbar on scroll</h3>
  <p>Scroll this page to see how the navbar behaves with data-spy="affix" and data-spy="scrollspy".</p>
  <p>The navbar is attached to the top of the page after you have scrolled a specified amount of pixels, and the links in the navbar are automatically updated based on scroll position.</p>
</div>

<nav class="navbar navbar-inverse" data-spy="affix" data-offset-top="197">
  <div class="container-fluid">
    <div class="navbar-header">
        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>                        
      </button>
      <a class="navbar-brand" href="#">WebSiteName</a>
    </div>
    <div>
      <div class="collapse navbar-collapse" id="myNavbar">
        <ul class="nav navbar-nav">
          <li><a href="#section1">Section 1</a></li>
          <li><a href="#section2">Section 2</a></li>
          <li><a href="#section3">Section 3</a></li>
          <li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" href="#">Section 4 <span class="caret"></span></a>
            <ul class="dropdown-menu">
              <li><a href="#section41">Section 4-1</a></li>
              <li><a href="#section42">Section 4-2</a></li>
            </ul>
          </li>
        </ul>
      </div>
    </div>
  </div>
</nav>    

<div id="section1" class="container-fluid">
  <h1>Section 1</h1>
  <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
  <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
</div>
<div id="section2" class="container-fluid">
  <h1>Section 2</h1>
  <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
  <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
</div>
<div id="section3" class="container-fluid">
  <h1>Section 3</h1>
  <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
  <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
</div>
<div id="section41" class="container-fluid">
  <h1>Section 4 Submenu 1</h1>
  <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
  <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
</div>
<div id="section42" class="container-fluid">
  <h1>Section 4 Submenu 2</h1>
  <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
  <p>Try to scroll this section and look at the navigation bar while scrolling! Try to scroll this section and look at the navigation bar while scrolling!</p>
</div>

</body>
</html>

参考： https ://www.w3schools.com/bootstrap/tryit.asp?filename=trybs_scrollspy_affix&stacked=h

于 2017-11-23T17:13:51.967 回答