Question

我在自举导航栏中添加固定的黑色背景时遇到了很多麻烦。在我的CSS中，我将背景颜色声明为黑色，但它似乎并没有改变任何东西。我自己的CSS是在bootstrap的核心CSS之后声明的，所以它不会被默认颜色覆盖。导航栏显示为透明，带有不透明字样。不确定是什么问题，特别是因为我已经宣布了导航栏的颜色！

以下是导航栏的HTML：

<div class="jumbotron">
  <div class="container">
    <nav class="navbar fixed-top">
      <div class="navbar-fixed-top container">
        <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="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
          </button>
        </div>
        <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
          <ul class="nav navbar-nav navbar-right">
            <li><a href="#linktotop">Home</a></li>
            <li><a href="#">About</a></li>
            <li>
              <a href="#" role="button" aria-haspopup="true" aria-expanded="false">Personal Projects<span class="caret"></span></a>
            </li>
              <li><a href="#">Bullet Blog</a></li>
            <li><a href="#">Contact</a></li>
          </ul>
        </div>
      </div>
</nav

这是我的CSS。请帮忙。我疯了。

.jumbotron navbar-fixed-top container{
    background: #2E2F31;
    position: fixed; 
    width: 100%;
}
.navbar .navbar-nav li a {
    color: white;
    font-size: 16px;
}
.navbar .navbar-nav li a:hover {
    background: #BFC1C3;
}
.navbar .navbar-nav .dropdown-menu li a:hover {
    background: #BFC1C3;
}

Answer 1

将您的css从.jumbotron navbar-fixed-top容器更改为.jumbotron .navbar-fixed-top.container我在此处更新了您的代码

＆＃13;

.jumbotron .navbar-fixed-top.container{
    background: #2E2F31;
    position: fixed; 
    width: 100%;
}
.navbar .navbar-nav li a {
    color: white;
    font-size: 16px;
}
.navbar .navbar-nav li a:hover {
    background: #BFC1C3;
}
.navbar .navbar-nav .dropdown-menu li a:hover {
    background: #BFC1C3;
}

＆＃13;

<html lang="en">
<head>
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>

<div class="navbar-inverse jumbotron">
    <div class="container">
        <!-- Header -->
 <nav class="navbar fixed-top">
      <div class="navbar-fixed-top container">
        <div class="navbar-header">
           <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
          </button>
        </div>
        <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
          <ul class="nav navbar-nav navbar-right">
            <li><a href="#linktotop">Home</a></li>
            <li><a href="#">About</a></li>
            <li>
              <a href="#" role="button" aria-haspopup="true" aria-expanded="false">Personal Projects<span class="caret"></span></a>
            </li>
            <li><a href="#">Bullet Blog</a></li>
            <li><a href="#">Contact</a></li>
          </ul>
        </div>
      </div>
    </nav>
    </div>
</div>




</body>
</html>

＆＃13;

Answer 2

我认为这正是你所需要的

<head>
    <link rel="stylesheet" href="farji.css">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>

<body>

    <div class=" jumbotron">
        <div class="container">
            <!-- Header -->
            <nav class="navbar-fixed-top navbar-inverse">
                <div class="container">
                    <div class="navbar-header">
                        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
          </button>
                    </div>
                    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
                        <ul class="nav navbar-nav navbar-right">
                            <li class="active"><a href="#">Home <span class="sr-only">(current)</span></a></li>>
                            <li><a href="#">About</a></li>
                            <li>
                                <a href="#" role="button" aria-haspopup="true" aria-expanded="false">Personal Projects<span class="caret"></span></a>
                            </li>
                            <li><a href="#">Bullet Blog</a></li>
                            <li><a href="#">Contact</a></li>
                        </ul>
                    </div>
                </div>
            </nav>
        </div>
    </div>
</body>

可选 - 如果您想要使用任何其他颜色进一步更改它，请使用以下css：

.navbar-inverse {
    background-color: #122c46;
    border-color: #122c46;
}

添加黑色背景到bootstrapped固定顶部导航栏

2 个答案: