Question

这是我现在正在使用的代码

<body style="height:1500px;" >
    <nav class="navbar navbar-expand-lg navbar-fixed-top navbar-light bg-light">
            <a class="navbar-brand" href="#">Navbar</a>
            <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
              <span class="navbar-toggler-icon"></span>
            </button>

            <div class="collapse navbar-collapse" id="navbarSupportedContent">
              <ul class="navbar-nav mr-auto">
                <li class="nav-item active">
                  <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
                </li>
                <li class="nav-item">
                  <a class="nav-link" href="#">Link</a>
                </li>
                <li class="nav-item dropdown">
                  <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                    Dropdown
                  </a>
                  <div class="dropdown-menu" aria-labelledby="navbarDropdown">
                    <a class="dropdown-item" href="#">Action</a>
                    <a class="dropdown-item" href="#">Another action</a>
                    <div class="dropdown-divider"></div>
                    <a class="dropdown-item" href="#">Something else here</a>
                  </div>
                </li>
                <li class="nav-item">
                  <a class="nav-link disabled" href="#">Disabled</a>
                </li>
              </ul>
              <form class="form-inline my-2 my-lg-0">
                <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
                <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
              </form>
            </div>
          </nav>

这是我的代码，我想修复此导航顶部，我该怎么做............................... ................................................... ................................................... .........................................

Answer 1

假设您使用的是最新的Bootstrap，则将导航固定在顶部的类为.fixed-top。

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<nav class="navbar navbar-expand-lg fixed-top navbar-light bg-light">
  <a class="navbar-brand" href="#">Navbar</a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
              <span class="navbar-toggler-icon"></span>
            </button>

  <div class="collapse navbar-collapse" id="navbarSupportedContent">
    <ul class="navbar-nav mr-auto">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Link</a>
      </li>
      <li class="nav-item dropdown">
        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                    Dropdown
                  </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdown">
          <a class="dropdown-item" href="#">Action</a>
          <a class="dropdown-item" href="#">Another action</a>
          <div class="dropdown-divider"></div>
          <a class="dropdown-item" href="#">Something else here</a>
        </div>
      </li>
      <li class="nav-item">
        <a class="nav-link disabled" href="#">Disabled</a>
      </li>
    </ul>
    <form class="form-inline my-2 my-lg-0">
      <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
      <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
    </form>
  </div>
</nav>

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Answer 2

将CSS样式设置为 nav标签

postion:fixed;
width:100%

它将把您的导航仪固定在顶部

Answer 3

您将需要position: fixed例如：

div{
  position: fixed;
  height: 32px;
  background-color: black;
  width: 100%;
}

<div></div>

Answer 4

我不知道您使用的是哪个引导程序版本，但是如果您使用的是最新版本的引导程序，则应在导航栏中将类“ navbar-fixed-top”替换为“ fixed-top”类，如果您将其替换，一切都会正常运行，我在您的代码中对其进行了尝试，并且一切正常，您可以在此处进行检查=> https://jsfiddle.net/aq9Laaew/90633/

sudo apt-get install wget
sudo apt-get install build-essential
sudo apt-get install libc6-dev

# find latest version of FreeTDS ftp://ftp.freetds.org/pub/freetds/stable/

wget ftp://ftp.freetds.org/pub/freetds/stable/freetds-1.00.92.tar.gz
tar -xzf freetds-1.00.92.tar.gz
cd freetds-1.00.92
./configure --prefix=/usr/local --with-tdsver=7.3
sudo make
sudo make install

想制作固定的导航栏，但对我没有用

4 个答案: