Bootstrap 4类form-inline和float-sm-right不能结合使用吗？

Question

HTML：

<form class="form-inline float-sm-right">
  <input type="text" class="form-control" placeholder="Search">
  <button class="btn btn-outline-success" type="submit">Search</button>
</form>

这来自使用Bootstrap v4.alpha2的示例。（我已经发现应该使用float-而不是pull- :(

但是它在Bootstrap v4.0.0中不起作用；我已经安装了凉亭。

什么是解决方案，才能使表格正确显示？还是不能将课程合并？

我必须说：Bootstrap假装使样式更容易，但是对我来说，它变得越来越糟-版本之间的许多变化:-(

编辑：我会给你整个代码块：

<nav class="navbar navbar-expand-sm navbar-dark bg-dark" id="nav-main">
  <a class="navbar-brand" href="#">Navbar</a>
  <ul class="nav navbar-nav">
    <li class="nav-item">
      <a href="#" class="nav-link">Home <span class="sr-only">(current)</span></a>
    </li>
    <li class="nav-item">
      <a href="#" class="nav-link">Features</a>
    </li>
    <li class="nav-item">
      <a href="#" class="nav-link">Pricing</a>
    </li>
    <li class="nav-item">
      <a href="#" class="nav-link">About</a>
    </li>
  </ul>
  <form class="form-inline float-sm-right">
    <input type="text" class="form-control" placeholder="Search">
    <button class="btn btn-outline-success" type="submit">Search</button>
  </form>
</nav>

希望与Bootstrap v4.0.0兼容！

Answer 1

Bootstrap 4导航栏是flexbox，因此float无法用于对齐。最简单的方法是使用自动页边距将表单向右推送。仅在使用ml-auto这margin-left:auto;...

https://www.codeply.com/go/Xhdz5MQIDS

<nav class="navbar navbar-expand-sm navbar-dark bg-dark" id="nav-main">
  <a class="navbar-brand" href="#">Navbar</a>
  <ul class="nav navbar-nav">
    <li class="nav-item">
      <a href="#" class="nav-link">Home <span class="sr-only">(current)</span></a>
    </li>
    <li class="nav-item">
      <a href="#" class="nav-link">Features</a>
    </li>
    <li class="nav-item">
      <a href="#" class="nav-link">Pricing</a>
    </li>
    <li class="nav-item">
      <a href="#" class="nav-link">About</a>
    </li>
  </ul>
  <form class="form-inline ml-auto">
    <input type="text" class="form-control" placeholder="Search">
    <button class="btn btn-outline-success" type="submit">Search</button>
  </form>
</nav>

相关问题：
Bootstrap 4将导航栏项目向右对齐

Answer 2

如果您将所有内容都放在 Bootstrap 列中，它会按预期工作：

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
    
<div class="container">
    <div class="row">
        <div class="col-12">
            <form class="form-inline float-sm-right">
                <input type="text" class="form-control" placeholder="Search">
                <button class="btn btn-outline-success" type="submit">Search</button>
            </form>
        </div>
    </div>
</div>