为什么我的字形图标没有显示在我的导航栏上 (bootstrap)？

Question

我正在为我的网站制作导航栏。

HTML

<nav class="navbar fixed-top navbar-expand-lg navbar-dark bg-dark">
    <a class="navbar-brand" href="#">Navbar</a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo02" aria-controls="navbarTogglerDemo02" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse" id="navbarTogglerDemo02">
        <ul class="navbar-nav mr-auto mt-2 mt-lg-0">
            <li class="nav-item active">
                <a class="nav-link" href="#"><span class="glyphicon glyphicon-home" style="color:blue"></span>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">
                <a class="nav-link disabled" href="#">Disabled</a>
            </li>
            <li>
            </li>
        </ul>
        <form class="form-inline my-2 my-lg-0">
            <input class="form-control mr-sm-2" type="search" placeholder="Search">
            <button class="btn btn-outline-light my-2 my-sm-0" type="submit">Search</button>
        </form>
    </div>
</nav>

但是我看不到 glyphicon 的主页，在我的浏览器中显示如下：

我的第一个想法是，也许默认情况下颜色是黑色的，我看不到它，因此我添加了 style="colour: blue;"，但没有任何区别。

有什么想法吗？

Answer 1

在Bootstrap 4中，glyphicons支持被移除，请使用font-awesome。

有关详细信息，请访问 https://getbootstrap.com/docs/4.4/migration/#components

Font-Awesome

的例子

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.13.0/css/all.min.css">

<nav class="navbar fixed-top navbar-expand-lg navbar-dark bg-dark">
    <a class="navbar-brand" href="#">Navbar</a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo02"
            aria-controls="navbarTogglerDemo02" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse" id="navbarTogglerDemo02">
        <ul class="navbar-nav mr-auto mt-2 mt-lg-0">
            <li class="nav-item active">
                <a class="nav-link" href="#">
                    <i class="fas fa-home" style="color:blue"></i> 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">
                <a class="nav-link disabled" href="#">Disabled</a>
            </li>
            <li>
            </li>
        </ul>
        <form class="form-inline my-2 my-lg-0">
            <input class="form-control mr-sm-2" type="search" placeholder="Search">
            <button class="btn btn-outline-light my-2 my-sm-0" type="submit">Search</button>
        </form>
    </div>
</nav>

<script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>

Answer 2

使用：

<li class="nav-item active">
    <a class="nav-link fa fa-home" href="#"></a>
    </span>Home <span class="sr-only">(current)</span></a>
</li>

为什么我的字形图标没有显示在我的导航栏上 (bootstrap)？

Why are my glyph-icons not showing on my navbar (bootstrap)?

html

css

twitter-bootstrap

bootstrap-4

glyphicons