Bootstrap导航下拉不起作用，我做错了什么？

Question

当平板电脑/手机视图中的菜单崩溃时，我无法获得引导下拉菜单或工作按钮。这里是我的导航HTML：

<nav class="navbar navbar-default navbar-fixed-top"> 
     <div class="container"> 
      <div class="navbar-header"> 
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar"> 
       <span class="sr-only">Toggle navigation</span> 
       <span class="icon-bar"></span> 
       <span class="icon-bar"></span> 
       <span class="icon-bar"></span> 
      </button> 
      <a class="navbar-brand" href="#"><img alt="brand" height="50" width="100" src="media/expend-logo.svg"></a> 
      </div> 
      <div id="navbar" class="navbar-collapse collapse"> 
      <ul class="nav navbar-nav navbar-right"> 
       <li class="active"><a href="#">Home</a></li> 
       <li><a href="#about">About</a></li> 
       <li><a href="#contact">Contact</a></li> 
       <li class="dropdown"> 
       <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a> 
       <ul class="dropdown-menu"> 
        <li><a href="#">Action</a></li> 
        <li><a href="#">Another action</a></li> 
        <li><a href="#">Something else here</a></li> 
        <li role="separator" class="divider"></li> 
        <li class="dropdown-header">Nav header</li> 
        <li><a href="#">Separated link</a></li> 
        <li><a href="#">One more separated link</a></li> 
       </ul> 
       </li> 
      </ul> 
      </div><!--/.nav-collapse --> 
     </div> 
     </nav> 

这些脚本：

<script type="text/javascript" src="Scripts/jquery-2.1.1.min.js"></script> 
<script type="text/javascript" src="Scripts/bootstrap.min.js"></script> 
<script> 
    $(document).ready(function() { 
    $('.dropdown-toggle').dropdown(); 
    }); 
</script> 

我在做什么错？提前致谢！

Answer 1

您没有正确包含脚本。这对我来说很有用。

<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> 
 
    
 
<nav class="navbar navbar-default navbar-fixed-top"> 
 
     <div class="container"> 
 
      <div class="navbar-header"> 
 
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar"> 
 
       <span class="sr-only">Toggle navigation</span> 
 
       <span class="icon-bar"></span> 
 
       <span class="icon-bar"></span> 
 
       <span class="icon-bar"></span> 
 
      </button> 
 
      <a class="navbar-brand" href="#"><img alt="brand" height="50" width="100" src="media/expend-logo.svg"></a> 
 
      </div> 
 
      <div id="navbar" class="navbar-collapse collapse"> 
 
      <ul class="nav navbar-nav navbar-right"> 
 
       <li class="active"><a href="#">Home</a></li> 
 
       <li><a href="#about">About</a></li> 
 
       <li><a href="#contact">Contact</a></li> 
 
       <li class="dropdown"> 
 
       <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a> 
 
       <ul class="dropdown-menu"> 
 
        <li><a href="#">Action</a></li> 
 
        <li><a href="#">Another action</a></li> 
 
        <li><a href="#">Something else here</a></li> 
 
        <li role="separator" class="divider"></li> 
 
        <li class="dropdown-header">Nav header</li> 
 
        <li><a href="#">Separated link</a></li> 
 
        <li><a href="#">One more separated link</a></li> 
 
       </ul> 
 
       </li> 
 
      </ul> 
 
      </div><!--/.nav-collapse --> 
 
     </div> 
 
     </nav> 
 

 
<script> 
 
    $(document).ready(function() { 
 
    $('.dropdown-toggle').dropdown(); 
 
    }); 
 
</script>

Answer 2

尝试。希望它有效。

<nav class="navbar navbar-default navbar-fix-top"> 
    <div class="container"> 
     <div class="navbar-header"> 
      <a class="navbar-brand" href="index.php"> 
       <img src="imgs/your image here" width="300" height="300" class="img-responsive"> 
      </a> 
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#nav-menu" aria-expanded="false"> 
       <span class="sr-only">Toggle navigation</span> 
       <span class="icon-bar"></span> 
       <span class="icon-bar"></span> 
       <span class="icon-bar"></span> 
      </button> 
     </div> 

     <div id="nav-menu" class="collapse navbar-collapse"> 
      <ul class="nav navbar-nav"> 
       <li> 
        <a href="page one"> 
         <span class="glyphicon glyphicon-home" aria-hidden="true"></span> 
         Home 
        </a> 
       </li> 
       <li> 
        <a href="another page"> 
         About 
        </a> 
       </li> 
       <li> 
        <a href="third link"> 
         Contact us 
        </a> 
       </li> 
       <li> 
        <div id="nav-options" class="btn-group pull-right hidden-xs"> 
         <button type="button" class="btn btn-default dropdown-toggle thumbnail" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> 
          <span class="glyphicon glyphicon-education" aria-hidden="true"></span> 
          Academics 
         </button> 
         <ul class="dropdown-menu"> 
          <li><a href="link1"><p class="text-center"> Link page</p></a> </li> 
          <li role="separator" class="divider"></li> 
          <li><a href="link2"><p class="text-center"> Linkpage 2</p></a></li> 
          <li role="separator" class="divider"></li> 
          <li><a href="link3"><p class="text-center"> Link page 3</p></a></li> 
         </ul> 
        </div> 
       </li> 
      </ul> 
     </div> 
    </div> 
</nav> 

和记住这