Question

我已经在SO和one上尝试过很多线程，但无法完成。我试图用引导程序4在顶部制作一个固定的导航栏。但看起来导航栏正在向顶部移动。我已经尝试过按照官方文档的建议在css中添加填充，但内容不是固定的navabar。这是默认的导航栏图像

这是我得到的固定导航栏图像我不知道我在这里缺少什么。这是代码

<nav class="navbar fixed-top navbar-light bg-light">
        <div class="collapse navbar-collapse" id="navbarNav">
            <ul class="navbar-nav">
                <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="#/product">Products</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#/services">Services</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#/career">Career</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#/contact">Contact Us</a>
                </li>
            </ul>
        </div>
    </nav>

对此有何帮助？

Answer 1

您需要使用 navbar-expand 类来显示导航栏，否则它将被折叠（因为移动设备是默认状态）。

https://www.codeply.com/go/HQbDGFwvxp

<nav class="navbar fixed-top navbar-expand navbar-light bg-light">
    <div class="collapse navbar-collapse" id="navbarNav">
        <ul class="navbar-nav">
            <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="#/product">Products</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#/services">Services</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#/career">Career</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#/contact">Contact Us</a>
            </li>
        </ul>
    </div>
</nav>

如果您不打算使用移动可折叠菜单，只需删除导航栏崩溃...

<nav class="navbar fixed-top navbar-expand navbar-light bg-light">
    <ul class="navbar-nav">
        <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="#/product">Products</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" href="#/services">Services</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" href="#/career">Career</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" href="#/contact">Contact Us</a>
        </li>
    </ul>
</nav>

类似问题
Bootstrap Navbar list items/links not showing
Disable responsive navbar in bootstrap 4

注意：使用fixed-top导航栏时，Bootstrap recommends在主体顶部添加填充以防止内容被Navbar隐藏..

body {
    padding-top: 56px;
}

Demo

Answer 2

你可以试试这个

nav{
   position:fixed;
   }

Answer 3

你试过这个：

<nav class="navbar fixed-top navbar-light bg-light" style="position:fixed;">
    <div class="collapse navbar-collapse" id="navbarNav">
        <ul class="navbar-nav">
            <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="#/product">Products</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#/services">Services</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#/career">Career</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#/contact">Contact Us</a>
            </li>
        </ul>
    </div>
</nav>

您应该在css页面中更改正确的类

Answer 4

删除固定顶部并使用css

<nav class="navbar navbar-light bg-light">
        <div class="collapse navbar-collapse" id="navbarNav">
            <ul class="navbar-nav">
                <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="#/product">Products</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#/services">Services</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#/career">Career</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#/contact">Contact Us</a>
                </li>
            </ul>
        </div>
    </nav>

Bootstrap 4固定顶部导航栏显示折叠和隐藏内容

4 个答案: