css – 移动设备上未显示Bootstrap“移动”菜单

所以我在我的网站上使用我的引导菜单得到了这种奇怪的行为.当我在移动设备(iPhone 4S,iPhone 6 plus,Galaxy S4)或Chrome模拟器中打开我的应用程序时,它会显示菜单的完整版本：
 

但是,当我在桌面浏览器上调整窗口大小时,它开始工作,即使此处的宽度大于设备中的宽度：

这是我的代码(我使用的是Bootstrap v3.2.0)：

<nav class="navbar navbar-default" role="navigation">
  <div class="container-fluid">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
        <div class="">
          <ul class="nav navbar-nav">
            <li><a href="<?php echo base_url('index.php/welcome/home');?>"><img src="<?php echo base_url('assets/img/logo.png');?>" id="mainLogo" /></a></li>
            <li class="dropdown">
                <a href="#" class="dropdown-toggle" data-toggle="dropdown">Red Bticino<b class="caret"></b></a>
                <ul class="dropdown-menu">
                    <li><a href="<?php echo base_url('index.php/setup/create');?>">Crear Nueva Red</a></li>
                    <li><a href="<?php echo base_url('index.php/setup/join');?>">Unirse a Red</a></li>
                    <li><a href="<?php echo base_url('index.php/setup/open');?>">Abrir Red</a></li>
                    <li><a id="leaveNet">Dejar esta Red</a></li>
                </ul>
            </li>
            <li class="dropdown">
                <a href="#" class="dropdown-toggle" data-toggle="dropdown">Control del Hogar<b class="caret"></b></a>
                <ul class="dropdown-menu">
                    <li><a href="<?php echo base_url('index.php/device/all');?>">Dispositivos</a></li>
                    <li><a href="<?php echo base_url('index.php/scene/home');?>">Escenarios</a></li>
                    <li><a href="<?php echo base_url('index.php/schedule');?>">Horarios</a></li>
                </ul>
            </li>
          </ul>
          <ul class="nav navbar-nav navbar-right">
            <li class="dropdown">
                <a href="#" class="dropdown-toggle iconNav" data-toggle="dropdown"><span class="glyphicon glyphicon-cog"></span></a>
                <ul class="dropdown-menu">
                    <li><a href="<?php echo base_url('index.php/settings/hour_simple');?>">Configuración Horaria</a></li>
                    <li><a href="<?php echo base_url('index.php/settings/network');?>">Configuración de Red</a></li>
                    <li><a href="#resetFactory" data-toggle="modal" data-target="#resetFactory">Factory Reset</a></li>
                    <li class="divider"></li>
                    <li><a href="<?php echo base_url('index.php/admin/users');?>">Gestionar Usuarios</a></li>
                </ul>
            </li>

            <li class="iconNav"><a href="<?php echo base_url('index.php/welcome/help');?>"><span class="glyphicon glyphicon-question-sign"></span></a></li>
          </ul>
        </div>
    </div><!-- /.navbar-collapse -->

  </div><!-- /.container-fluid -->
</nav>

你碰巧发现我的HTML代码有问题吗？谢谢！

在您的网页上< head>部分,添加以下元标记：

<meta name="viewport" content="width=device-width, user-scalable=no">

根据Google Developers的说法,这里有一些关于视口如何工作的信息：

Without a viewport, mobile devices will render the page at a typical desktop screen width, scaled to fit the screen. Setting a viewport gives control over the page’s width and scaling on different devices.

资料来源：https://developers.google.com/speed/docs/insights/ConfigureViewport