Question

我添加了以下导航栏和新的bootstrap 4版本。但它也没有在导航栏下方显示任何内容。导航后插入的文本，如果使用外部css文件为下面插入的图像提供css，也不会采用宽度和高度属性。知道为什么会这样吗？

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Forestpin</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
  <link rel="stylesheet" type="text/css" href="assets/css/home.css"/>
  
</head>
<body>
<nav class="navbar navbar-toggleable-md navbar-light fixed-top bg-faded">
  <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>
  <a class="navbar-brand" href="#">
    <img src="assets/images/logofpin.png" alt="Forestpin" width="70" height="30">
  </a>
  <div class="collapse navbar-collapse" id="navbarNav">
    <ul class="navbar-nav">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item dropdown">
        <a class="nav-link dropdown-toggle" href="" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Products
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
          <a class="dropdown-item" href="#">Risk Engine</a>
          <a class="dropdown-item" href="#">Analytics</a>
        </div>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Insights</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">FAQ</a>
      </li>
    </ul>
  </div>
</nav>
vdfnfhmjhngsdhfjfnd
fdbnmjnfbdfgn
sample text

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
</body>
</html>

Answer 1

在导航代码fixed-top中，类会导致问题。您可以将navbar-fixed-top用于固定导航栏。请查看下面的代码段以供参考。

<!DOCTYPE html>
<html lang="en">

<head>
  <title>Forestpin</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">

  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
  <link rel="stylesheet" type="text/css" href="assets/css/home.css" />

</head>

<body>
  <nav class="navbar navbar-toggleable-md navbar-light navbar-fixed-top bg-faded">
    <div class="navbar-header">
      <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>
      <a class="navbar-brand" href="#">
        <img src="assets/images/logofpin.png" alt="Forestpin" width="70" height="30">
      </a>
    </div>
    <div class="collapse navbar-collapse" id="navbarNav">
      <ul class="navbar-nav">
        <li class="nav-item active">
          <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
        </li>
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" href="" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Products
        </a>
          <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
            <a class="dropdown-item" href="#">Risk Engine</a>
            <a class="dropdown-item" href="#">Analytics</a>
          </div>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Insights</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">FAQ</a>
        </li>
      </ul>
    </div>
  </nav>
  vdfnfhmjhngsdhfjfnd fdbnmjnfbdfgn sample text
</body>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>

</html>

文本不显示引导程序4

1 个答案: