Bootstrap navbar下拉菜单不起作用

Question

所以我正在使用模板“Butterfly”的引导程序网站上工作到目前为止，除了移动设备调整大小的导航栏外，一切工作正常。由于某些原因，移动设备上的下拉菜单无法打开。我正在使用一个PHP include标签来轻松地在网站的每个页面上包含相同的导航栏，并允许轻松更新它。

<?php include_once("template/menu.html"); ?> 

导航栏代码：

<!--Mobile version of header--> 
    <ul class="toggle"> 
     <li><a href="../index.php">Home</a></li> 
     <li><span style="cursor:pointer"> 
     <div class="dropdown"> 
      <a class="dropdown-toggle disabled" id="dropdownMenu1" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true"> 
      Properties 
      <span class="caret"></span> 
      </a> 
      <ul class="dropdown-menu" aria-labelledby="dropdownMenu1"> 
      <li><a href="#">Link 3<span class="label label-success label-as-badge">0 New</span></a></li> 
      <li><a href="#">Link 2<span class="label label-success label-as-badge">3 New</span></a></li> 
      <li><a href="#">Link 3<span class="label label-success label-as-badge">Nothing here</span></a></li> 
      </ul> 
     </div></span> 
     </li> 
     <li><a href="#work_outer">Links</a></li> 
     <li><a href="#Portfolio">About</a></li> 
     <li><a href="#client_outer">Apply</a></li> 
    </ul> 

这里是导航栏的CSS：

.nav-right{ 
    float:right; 
    } 

.nav ul{ 
    list-style:none; 
    padding:0px; 
    } 
.nav ul.toggle{ 
    display:none; 
    visibility:hidden; 
    height:0px; 
    overflow:hidden; 
    margin-bottom: 0; 
    } 

.nav ul li{ 
    display:inline-block; 
    margin:0 23px; 
    } 

.nav ul li:first-child{ 
    /*margin:0px;*/ 
    } 

.nav ul li:last-child{ 
    margin:0 0 0 23px; 
    } 

.nav ul li a{ 
    display:block; 
    font-size:14px; 
    color:#222222; 
    font-family:'Dosis'; 
    text-decoration:none; 
    text-transform:uppercase; 
    font-weight: 600; 
    transition:all 0.2s ease-in-out; 
    -moz-transition:all 0.2s ease-in-out; 
    -webkit-transition:all 0.2s ease-in-out;  
    } 
.nav ul li a:hover{ 
    color:#49b5e7; 
    } 

下面是导航栏的一些更多的CSS。最重要的是从bootstrap.css默认的，但我不知道：

.dropdown { 
    position: relative; 
} 
.dropdown-toggle:focus { 
    outline: 0; 
} 
.dropdown-menu { 
    position: absolute; 
    top: 100%; 
    left: 0; 
    z-index: 1000; 
    display: none; 
    float: left; 
    min-width: 160px; 
    padding: 5px 0; 
    margin: 2px 0 0; 
    list-style: none; 
    font-size: 14px; 
    background-color: #ffffff; 
    border: 1px solid #cccccc; 
    border: 1px solid rgba(0, 0, 0, 0.15); 
    border-radius: 4px; 
    -webkit-box-shadow: 0 6px 12px rgba(0, 0, 0, 0.175); 
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.175); 
    background-clip: padding-box; 
} 
.dropdown-menu.pull-right { 
    right: 0; 
    left: auto; 
} 
.dropdown-menu .divider { 
    height: 1px; 
    margin: 9px 0; 
    overflow: hidden; 
    background-color: #e5e5e5; 
} 
.dropdown-menu > li > a { 
    display: block; 
    padding: 3px 20px; 
    clear: both; 
    font-weight: normal; 
    line-height: 1.428571429; 
    color: #333333; 
    white-space: nowrap; 
} 
.dropdown-menu > li > a:hover, 
.dropdown-menu > li > a:focus { 
    text-decoration: none; 
    color: #262626; 
    background-color: #f5f5f5; 
} 
.dropdown-menu > .active > a, 
.dropdown-menu > .active > a:hover, 
.dropdown-menu > .active > a:focus { 
    color: #ffffff; 
    text-decoration: none; 
    outline: 0; 
    background-color: #428bca; 
} 
.dropdown-menu > .disabled > a, 
.dropdown-menu > .disabled > a:hover, 
.dropdown-menu > .disabled > a:focus { 
    color: #999999; 
} 
.dropdown-menu > .disabled > a:hover, 
.dropdown-menu > .disabled > a:focus { 
    text-decoration: none; 
    background-color: transparent; 
    background-image: none; 
    filter: progid:DXImageTransform.Microsoft.gradient(enabled = false); 
    cursor: not-allowed; 
} 
.open > .dropdown-menu { 
    display: block; 
} 
.open > a { 
    outline: 0; 
} 
.dropdown-header { 
    display: block; 
    padding: 3px 20px; 
    font-size: 12px; 
    line-height: 1.428571429; 
    color: #999999; 
} 
.dropdown-backdrop { 
    position: fixed; 
    left: 0; 
    right: 0; 
    bottom: 0; 
    top: 0; 
    z-index: 990; 
} 

感谢您的阅读，任何帮助深表感谢。如果您需要更多信息，只需询问我会在代码中找到它并发布。再次感谢大家！

Answer 1

您必须添加一个媒体查询（http://www.w3schools.com/cssref/css3_pr_mediaquery.asp） 并更改下拉菜单在CSS