twitter-bootstrap Bootstrap 4 多个固定顶部导航栏
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Bootstrap 4 Multiple fixed-top navbars
提问by Byron Daries
Is it possible to have multiple fixed-top navbars in Bootstrap 4 showing under each other?
是否可以在 Bootstrap 4 中显示多个固定顶部导航栏？
The 1 currently overlays the other which is not what I want.
1 目前覆盖了另一个，这不是我想要的。
采纳答案by Zim
Yes, it's possible but you have to position the 2nd one accordingly. The height of the Navbar is ~56px.
是的，这是可能的，但您必须相应地定位第二个。导航栏的高度约为 56 像素。
.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>
Demo: Bootstrap 4 Multiple fixed-top Navbars
In some scenarios, it may be better to use a single fixed-topDIV to contain both.
在某些情况下，最好使用单个fixed-topDIV 来包含两个.
Also see:
Bootstrap 4 Navbar sticky after header
Bootstrap 4 collapsing two navbars into one toggle button
另请参阅：
Bootstrap 4 Navbar sticky after header
Bootstrap 4 将两个导航栏折叠成一个切换按钮
回答by madav
Both navs can use sticky-top (instead of fixed-top) so you don't have to set the padding on the body.
两个导航都可以使用粘性顶部（而不是固定顶部），因此您不必在主体上设置填充。
The second navbar should use topso that the padding will only show when it nears the top.
应使用第二个导航栏，top以便填充仅在接近顶部时显示。
padding-topwill create padding before it hits the top navbar when the padding is necessary.
padding-top当需要填充时，将在它到达顶部导航栏之前创建填充。
See here:
看这里：
