实例导航条代码

<!-- 1.导航条 -->
    <div class="navbar-wrapper">
        <div class="container">
            <nav class="navbar navbar-inverse navbar-static-top">
                <div class="container">
                    <!-- logo部分 -->
                    <div class="navbar-header">
                        <!-- 移动端把导航条折叠起来 -->
                        <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> <!--  移动端显示为一条横线 -->
                        </button>
                        <a class="navbar-brand" href="#">Project name</a>
                    </div>

                    <div id="navbar" class="navbar-collapse collapse">
                        <!-- 导航条列表 -->
                        <ul class="nav navbar-nav">
                            <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>

                </div>
            </nav>
        </div>
    </div>