Bootstrap 4多个固定顶部导航栏

问题描述：

Bootstrap 4中是否可能有多个固定顶部的导航栏在彼此下方显示?

Is it possible to have multiple fixed-top navbars in Bootstrap 4 showing under each other?

1当前覆盖了另一个，这不是我想要的.

The 1 currently overlays the other which is not what I want.

答

是的，可以，但是您必须相应地放置第二个.导航栏的高度为〜56px.

Yes, it's possible but you have to position the 2nd one accordingly. The height of the Navbar is ~56px.

.fixed-top-2 {
    margin-top: 56px;
}

body {
    padding-top: 105px;
}

<nav class="navbar navbar-toggleable-sm bg-faded navbar-light fixed-top fixed-top-2">
    <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbar1">
        <span class="navbar-toggler-icon"></span>
    </button>
    <a href="/" class="navbar-brand">One</a>
    <div class="navbar-collapse collapse" id="navbar1">
        <ul class="navbar-nav">
            ..
        </ul>
    </div>
</nav>

<nav class="navbar navbar-toggleable-sm bg-inverse navbar-inverse fixed-top">
    <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbar2">
        <span class="navbar-toggler-icon"></span>
    </button>
    <a href="/" class="navbar-brand">Two</a>
    <div class="navbar-collapse collapse" id="navbar2">
        <ul class="navbar-nav">
            ..
        </ul>
    </div>
</nav>

演示:Bootstrap 4多个固定顶部导航栏

在某些情况下，最好使用

In some scenarios, it may be better to use a single fixed-top DIV to contain both.

另请参见:
Bootstrap 4导航栏在标头后粘滞
 Bootstrap 4将两个导航栏折叠为一个切换按钮

Also see:
Bootstrap 4 Navbar sticky after header
Bootstrap 4 collapsing two navbars into one toggle button

Bootstrap 4多个固定顶部导航栏

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