Question

这里的代码是关于为什么下拉按钮不起作用的任何想法，我一直在互联网上观看教程并在这里寻找解决方案，但无济于事，可能我是愚蠢但请帮助。

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<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">
    <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
    <title>Bootstrap 101 Template</title>

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

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      <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
    <![endif]-->
  </head>
  <body>

   <div class="navbar navbar-default navbar-fixed-top" role="navigation">
    <div class="container">
        <div class="navbar-header">
            <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
                <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="#">Squad Builder.net</a>


        </div>
            <div class="navbar-collapse collapse">
                <ul class="nav navbar-nav navbar-right">
                    <li class="active"><a href="#">Home</a></li>
                    <li><a href="#">About</a></li>
                    <li class="dropdown">
                        <a href="#" class="dropdown-toggle" data-toggle="dropdown">Information</a>
                    </li>

            </div>
    </div>  

  </div>


    <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
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  </body>
</html>

Answer 1

因为您没有添加到的任何项目，所以当您点击它时会显示该下拉列表。

<强> FIDDLE

<强> HTML ：

<div class="navbar navbar-default navbar-fixed-top" role="navigation">
    <div class="container">
        <div class="navbar-header">
            <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse"> <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="#">Squad Builder.net</a>

        </div>
        <div class="navbar-collapse collapse">
            <ul class="nav navbar-nav navbar-right">
                <li class="active"><a href="#">Home</a>
                </li>
                <li><a href="#">About</a>
                </li>
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Information <span class="caret"></a>
                    <ul class="dropdown-menu" role="menu">
                        <li><a href="#">Action</a>
                        </li>
                        <li><a href="#">Another action</a>
                        </li>
                        <li><a href="#">Something else here</a>
                        </li>
                        <li class="divider"></li>
                        <li><a href="#">Separated link</a>
                        </li>
                        <li class="divider"></li>
                        <li><a href="#">One more separated link</a>
                        </li>
                    </ul>
                </li>
            </ul>
        </div>
    </div>
</div>

另外，不要忘记使用插入符类添加范围以指示它是下拉列表。

Answer 2

我希望我得到你想要的东西

<div class="navbar-collapse collapse">
            <ul class="nav navbar-nav navbar-right">
                <li class="active"><a href="#">Home</a></li>
                <li><a href="#">About</a></li>
                 <!--first u need to add the list tag <li>-->
                <li class="dropdown">
                    <!--then add the first level link with toggle class see bootstrap docs-->
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Information 
                        <!--this is to display the small arrow u can change it to what ever u want-->
                        <span class="caret"></span></a>
                    <!--here are the second level links-->
                <ul class="dropdown-menu" role="menu">
                    <li><a href="#">item 1</a></li>
                    <li><a href="#">item 2</a></li>
                    <li><a href="#">item 3</a></li>
                </ul>
                    </li>
                <!--u forgot to close the first <ul>-->
            </ul>
        </div>

使用bootstrap和下拉按钮制作导航栏不会工作

2 个答案: