Bootstrap 当导航栏在折叠的汉堡包中时不显示导航栏下拉菜单按钮

Question

我有一个带有 css 媒体查询的 boostrap 导航栏，当屏幕小于一定尺寸时（对于移动设备），可以折叠它并通过汉堡按钮打开它。但是，我的导航栏中也有一个下拉菜单，当导航栏全屏展开时它工作正常，但是当我从导航栏的汉堡包版本中打开它时，下拉菜单中的按钮不显示。

宽屏 - 导航栏下拉效果很好：

窄屏（汉堡包）- 下拉菜单按钮不显示：

下面是导航栏的 html 代码：

<nav class="navbar navbar-default" data-spy="affix" data-offset-top="900">
  <div class="container-fluid">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <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="Son Of The Right Hand v.0.html#postWelcome">Son of the Right Hand</a>
    </div>


    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li class="active" id="home"><a href="Son Of The Right Hand v.0.html#postWelcome">Home <span class="sr-only">(current)</span></a></li>
        <li><a href="#">What is tSotRH?</a></li>
        <li><a href="#">About Me</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Streams <span class="caret"></span></a>
          <ul class="dropdown-menu pinkBackground">
            <li><a style="color:#062F4F" href="#">Stream 1</a></li>
            <li><a style="color:#062F4F" href="#">Stream 2</a></li>
            <li><a style="color:#062F4F" href="#">Stream 3</a></li>
          </ul>
        </li>
      </ul>


    </div>
</nav>

这是折叠导航栏的 CSS 媒体查询：

@media (min-width: 768px) {
    .navbar .navbar-nav {
        display: inline-block;
        float: none;
        vertical-align: top;

    }

    .navbar .navbar-collapse {
        text-align: center;
    }
}

这是我的导航栏的 CSS 代码：

.navbar-default {
    z-index: 1;
    background-color: #062F4F;
    border-color: #062F4F;
}
/* title */
.navbar-default .navbar-brand {
    color: #FFFFFF;
}
.navbar-default .navbar-brand:hover,
.navbar-default .navbar-brand:focus {
    color: #813772;
}
/* link */
.navbar-default .navbar-nav > li > a {
    color: #FFFFFF;
}
.navbar-default .navbar-nav > li > a:hover,
.navbar-default .navbar-nav > li > a:focus {
    color: #813772;
}
.navbar-default .navbar-nav > .active > a, 
.navbar-default .navbar-nav > .active > a:hover, 
.navbar-default .navbar-nav > .active > a:focus {
    color: #FFFFFF;
    background-color: #813772;
}
.navbar-default .navbar-nav > .open > a, 
.navbar-default .navbar-nav > .open > a:hover, 
.navbar-default .navbar-nav > .open > a:focus {
    color: #FFFFFF;
    background-color: #062F4F;
}
/* caret */
.navbar-default .navbar-nav > .dropdown > a .caret {
    border-top-color: #000000;
    border-bottom-color: #000000;
}

非常感谢任何帮助，为什么导航栏下拉按钮不显示当菜单从折叠按钮打开时（另外，我意识到这可能是一个非常愚蠢和简单的错误，但我可以没找到）

Answer 1

可以正常工作，但锚点颜色与背景相同，为此您必须使用 class 并使用媒体屏幕更改颜色，或者在移动设备上使用默认 bootstrap 颜色（灰色）

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<style>
  .navbar-default {
    z-index: 1;
    background-color: #062F4F;
    border-color: #062F4F;
}
/* title */
.navbar-default .navbar-brand {
    color: #FFFFFF;
}
.navbar-default .navbar-brand:hover,
.navbar-default .navbar-brand:focus {
    color: #813772;
}
/* link */
.navbar-default .navbar-nav > li > a {
    color: #FFFFFF;
}
.navbar-default .navbar-nav > li > a:hover,
.navbar-default .navbar-nav > li > a:focus {
    color: #813772;
}
.navbar-default .navbar-nav > .active > a, 
.navbar-default .navbar-nav > .active > a:hover, 
.navbar-default .navbar-nav > .active > a:focus {
    color: #FFFFFF;
    background-color: #813772;
}
.navbar-default .navbar-nav > .open > a, 
.navbar-default .navbar-nav > .open > a:hover, 
.navbar-default .navbar-nav > .open > a:focus {
    color: #FFFFFF;
    background-color: #062F4F;
}
/* caret */
.navbar-default .navbar-nav > .dropdown > a .caret {
    border-top-color: #000000;
    border-bottom-color: #000000;
}
.navbar-default .navbar-nav  .pinkBackground>li>a {
    color:#062F4F ;
}

@media (min-width: 768px) {
    .navbar .navbar-nav {
        display: inline-block;
        float: none;
        vertical-align: top;

    }

    .navbar .navbar-collapse {
        text-align: center;
    }
}

 </style>
<nav class="navbar navbar-default" data-spy="affix" data-offset-top="900">
  <div class="container-fluid">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <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="Son Of The Right Hand v.0.html#postWelcome">Son of the Right Hand</a>
    </div>


    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li class="active" id="home"><a href="Son Of The Right Hand v.0.html#postWelcome">Home <span class="sr-only">(current)</span></a></li>
        <li><a href="#">What is tSotRH?</a></li>
        <li><a href="#">About Me</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Streams <span class="caret"></span></a>
          <ul class="dropdown-menu pinkBackground">
            <li><a href="#">Stream 1</a></li>
            <li><a href="#">Stream 2</a></li>
            <li><a  href="#">Stream 3</a></li>
          </ul>
        </li>
      </ul>


    </div>
</nav>

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