Bootstrap 4中心肚脐品牌崩溃

Question

引导4阿尔法6

我似乎不知道如何同时获得右链接和左链接到两个崩溃。现在只有右边的链接会崩溃。

<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

您应该将将和菜单ul包装在一个navbar-collapse div中。切换菜单按钮只会将目标一折叠 div ，而不是多。正如早期的一样，有两个肚脐塌陷的。

这是你应该使用的代码。

​

<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 2

<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 3

ZimSystem发布的代码会因为有100%的宽度而重叠菜单项，并且可能与单击事件等发生冲突。更好的选择是使用左而不是宽度。

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