twitter-bootstrap – Bootstrap导航栏下拉菜单不滚动

我刚开始使用bootstrap并且遇到一个可能很容易解决的问题.我发现了类似的问题,但它们都与移动设备有关,我的问题是桌面问题.它在移动设备上运行良好.

我的页面顶部有一个导航栏设置.它包含一个下拉菜单,其中包含项目列表.一旦此列表变得太长,其余部分就会被截断并无法滚动.

据我所知,子菜单不再是bootstrap 3.0的一部分,我不想使用它们.我只想滚动列表,无论其中的项目数量如何.

<!DOCTYPE html>
<html lang="en">
<head>
    <Meta charset="utf-8">
    <Meta http-equiv="X-UA-Compatible" content="IE=edge">
    <Meta name="viewport" content="width=device-width,initial-scale=1">
    <title>Website</title>

    <!-- Bootstrap -->
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <link rel="stylesheet" href="css/lightBox.css"/>
    <link rel="stylesheet" href="css/font-awesome.css"/>
    <link rel="stylesheet" href="css/style.css"/>

    <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
    <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
    <!--[if lt IE 9]>
    <script src="../../oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
    <script src="../../oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
    <![endif]-->
</head>
<body>

<!-- NAVBAR -->
<nav class="navbar navbar-fixed-top" id="main-navbar" role="navigation">
    <div class="container">
        <div class="navbar-header">
            <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbar-container">
                <span class="sr-only">Toggle navigation</span>
               <i class="fa fa-bars fa-2x"></i>
            </button>

            <a href="index.html" class="navbar-brand">Homepage</a>
        </div>
        <!-- end navbar-header -->

        <div class="collapse navbar-collapse" id="navbar-collapse">

            <ul class="nav navbar-nav navbar-right nav_color">
                <li class="dropdown">
                    <a href="index.html#" class="dropdown-toggle" data-toggle="dropdown">2015 <strong class="caret"></strong></a>
                    <ul class="dropdown-menu">
                        <li> <a href="mokuleia.html">Page 1</a> </li>
                        <li> <a href="index.html#">Page 2</a> </li>
                        <li> <a href="index.html#">Page 3</a> </li>
                        <li> <a href="index.html#">Page 4</a> </li>
                        <li> <a href="index.html#">Page 5</a> </li>
                        <li> <a href="index.html#">Page 6</a> </li>
                        <li> <a href="index.html#">Page 7</a> </li>
                        <li> <a href="index.html#">Page 8</a> </li>
                        <li> <a href="index.html#">Page 9</a> </li>
                        <li> <a href="index.html#">Page 10</a> </li>
                        <li> <a href="index.html#">Page 11</a> </li>
                        <li> <a href="index.html#">Page 12</a> </li>
                        <li> <a href="index.html#">Page 13</a> </li>
                        <li> <a href="index.html#">Page 14</a> </li>
                        <li> <a href="index.html#">Page 15</a> </li>
                        <li> <a href="index.html#">Page 16</a> </li>
                        <li> <a href="index.html#">Page 17</a> </li>
                        <li> <a href="index.html#">Page 18</a> </li>
                        <li> <a href="index.html#">Page 19</a> </li>
                        <li> <a href="index.html#">Page 20</a> </li>
                        <li> <a href="index.html#">Page 21</a> </li>
                        <li> <a href="index.html#">Page 21</a> </li>
                        <li> <a href="index.html#">Page 22</a> </li>
                        <li> <a href="index.html#">Page 23</a> </li>
                        <li> <a href="index.html#">Page 24</a> </li>
                        <li> <a href="index.html#">Page 25</a> </li>
                        <li> <a href="index.html#">Page 26</a> </li>
                        <li> <a href="index.html#">Page 27</a> </li>
                        <li> <a href="index.html#">Page 28</a> </li>
                        <li> <a href="index.html#">Page 29</a> </li>
                        <li> <a href="index.html#">Page 30</a> </li>

                    </ul>
                    <!-- end dropdown-menu -->
                </li>

            </ul>
        </div>
        <!-- end collapse -->
    </div>
    <!-- end container -->
</nav> <!--End navigation-->



<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src="js/jquery.min.js"></script>
<!-- Include all compiled plugins (below),or include individual files as needed -->
<script src="js/bootstrap.min.js"></script>
<script src="js/lightBox.js"></script>
<script src="js/script.js"></script>
</body>
</html>

解决方法

这可能是因为页面的高度小于菜单项的高度.因此,当您单击菜单时,额外的菜单将被隐藏,而不是可滚动的.

试试这个：

html,body
{
    height: 100%;
}

或者将身体的最小身高设置为100％

body {
  min-height: 100%;
}

如果两者都不起作用,请尝试为下拉菜单设置固定高度并使其滚动.

.dropdown-menu{
   max-height:300px;
   overflow-y: scroll;
}

这是一个演示：http://www.bootply.com/fJQczOgeeY

twitter-bootstrap – Bootstrap导航栏下拉菜单不滚动

解决方法

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