将第二个导航栏链接折叠到第一个导航栏

Question

我有两个导航栏（不确定是否需要两个）...顶部导航栏包含徽标和购物车 link，下方导航栏包含 link。折叠时，我希望下部导航栏折叠到顶部导航栏中，以便只有顶部导航栏保留汉堡包（links）位于左侧，徽标位于中心，购物车位于右侧。

下面的代码无效。折叠时，第二个导航栏消失，购物车移到左侧并且没有折叠汉堡包。预先感谢您的帮助。

<!DOCTYPE html>
<html lang="en">
<head>
<title>Collapse</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1   /css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
<style>
.second-navbar{
top:50px;
text-align:center;
border-bottom-width:2px;
z-index:1000;
height: 40px; 
}

.second-container{
padding-left:0px;
padding-right:0px;
}
.navbar-brand {
transform: translateX(-50%);
left: 50%;
position: absolute;
}
.navbar .navbar-nav {
display: inline-block;
float: none;
vertical-align: top;
}

.navbar .navbar-collapse {
text-align: center;
}
</style>
</head>
<body>
<nav class="navbar navbar-default">
<div class="container-fluid">
<a class="navbar-brand" href="#">LOGO</a>
   <ul class="nav navbar-nav navbar-right">
     <li>
        <a href='#' class="glyphicon glyphicon-shopping-cart" style="font-size:24px;z-index:150;position:relative;float:right;"></a>
     </li>
   </ul>

<div class="navbar navbar-header">
  <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar" style="float:left;">
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>                        
  </button>
  
</div>
</div>
</nav>

<nav class="navbar navbar-default navbar-fixed-top second-navbar">
<div class="container-fluid">
  <div class="collapse navbar-collapse" id="myNavbar">
    <ul class="nav navbar-nav navbar-right">
      <li><a href="#link1">LINK1</a></li>
      <li><a href="#link2">LINK2</a></li>
      <li><a href="#link3">LINK3</a></li>
      <li><a href="#link4">LINK4</a></li>
    </ul>
  </div>
</div>  
</nav>

</body>
</html>

Answer 1

您可以使用一个导航栏，而不是使用两个导航栏，并通过使带有购物车和徽标的部分全宽将 navbar-collapse 推到它自己的行。

要获得左侧的切换按钮和右侧的购物车，您可以使用 pull-left 和 -right。

.navbar-center {
    transform: translateX(-50%);
    left: 50%;
    position: absolute;
}

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>


<nav class="navbar navbar-default">
    <div class="container-fluid">
        <!-- Brand and toggle get grouped for better mobile display -->
        <div class="navbar-header" style="width: 100%;">
            <button type="button" class="navbar-toggle collapsed pull-left" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false" style="margin-left: 1rem">
                <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 navbar-center" href="#">LOGO</a>
            <a href="#" class="navbar-brand pull-right" style="font-size:24px;"><span class="glyphicon glyphicon-shopping-cart""></span><span class=" sr-only">Shopping cart</span></a>
        </div>

        <!-- Collect the nav links, forms, and other content for toggling -->
        <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
            <ul class="nav navbar-nav navbar-right">
                <li class="active"><a href="#">Link 1</a></li>
                <li><a href="#">Link 2</a></li>
                <li><a href="#">Link 3</a></li>
                <li><a href="#">Link 4</a></li>
            </ul>
        </div><!-- /.navbar-collapse -->
    </div><!-- /.container-fluid -->
</nav>

为了得到中间的标志，我加了一个特殊的class。

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