Bootstrap 4 中心导航栏品牌折叠

Question

Bootstrap 4 阿尔法 6

我似乎无法弄清楚如何让右 link 和左 link 都崩溃。现在只有右侧 link 崩溃了。

<nav id="topNav" class="navbar fixed-top navbar-toggleable-sm navbar-inverse bg-inverse">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target=".navbar-collapse">
    Menu
</button>
<div class="navbar-collapse collapse">
    <ul class="nav navbar-nav">
        <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
        </li>
    </ul>
</div>

<a class="navbar-brand mx-auto" href="#">NavBar</a>

<div class="navbar-collapse collapse">
    <ul class="nav navbar-nav ml-auto">
        <li class="nav-item">
            <a class="nav-link" href="#">About</a>
        </li>
    </ul>
</div>

Answer 1

<nav id="topNav" class="navbar fixed-top navbar-toggleable-sm navbar-inverse bg-inverse">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target=".navbar-collapse">
    Menu
</button>
  <a class="navbar-brand mx-auto" href="#">NavBar</a>

<div class="navbar-collapse collapse">
    <ul class="nav navbar-nav">
        <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
        </li>
    </ul>
  <ul class="nav navbar-nav ml-auto">
        <li class="nav-item">
            <a class="nav-link" href="#">About</a>
        </li>
    </ul>
</div>

Answer 2

您应该将 菜单 ul 合并 div。 切换菜单按钮只会针对一个折叠div而不是多个。 早些时候有两个导航栏折叠。

Here is code you should use.

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous"> <script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script> <nav id="topNav" class="navbar fixed-top navbar-toggleable-sm navbar-inverse bg-inverse"> <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target=".navbar-collapse"> Menu </button> <a class="navbar-brand mx-auto" href="#">NavBar</a> <div class="navbar-collapse collapse"> <ul class="nav navbar-nav"> <li class="nav-item"> <a class="nav-link" href="#">Link</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Link</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Link</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Link</a> </li> </ul> <ul class="nav navbar-nav ml-auto"> <li class="nav-item"> <a class="nav-link" href="#">About</a> </li> </ul> </div> </nav>

Answer 3

~~目前在 alpha 6 中，崩溃仅支持单个目标。~~。

更新Bootstrap4.1

您可以在较大的屏幕上对品牌进行绝对定位，并为 2 个导航栏使用单个折叠。

@media (min-width: 768px) {
.navbar-brand
    {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
    }
}

http://www.codeply.com/go/Sh05HDqIh1

另见：

Answer 4

ZimSystem 发布的代码将由于宽度为 100% 而与菜单项重叠，并且可能与点击事件等发生冲突。更好的选择是使用左侧而不是宽度。

.navbar-brand
  {
    display: block;
    left: 50%;
    position: absolute;
    text-align: center;
  }

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