我一直试图通过为它们分配不同的 Bootstrap 列长度来将搜索栏和提交按钮放在同一行的表单中，但表单标签拒绝允许这样做。
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.3/css/bootstrap.min.css" integrity="sha384-Zug+QiDoJOrZ5t4lssLdxGhVrurbmBWopoEl+M6BdEfwnCJZtKxi1KgxUyJq13dy" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script defer src="https://use.fontawesome.com/releases/v5.0.2/js/all.js"></script>
<body>
<br>
<div class="input-group col-lg-12">
<form method="post">
<input type="text" class="form-control input-lg" placeholder="Ex: WRT 102" />
<button type="submit"><i class="fa fa-search"></i></button>
</form>
</div>
</body>
</head>
</html>最佳答案
使用 display:flex 创建带有新类的 div 的简单方法
.flex{
display:flex;
}<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.3/css/bootstrap.min.css" integrity="sha384-Zug+QiDoJOrZ5t4lssLdxGhVrurbmBWopoEl+M6BdEfwnCJZtKxi1KgxUyJq13dy" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script defer src="https://use.fontawesome.com/releases/v5.0.2/js/all.js"></script>
<body>
<br>
<div class="input-group col-lg-12">
<form method="post">
<div class="flex">
<input type="text" class="form-control input-lg" placeholder="Ex: WRT 102" />
<button type="submit"><i class="fa fa-search"></i></button>
</div>
</form>
</div>
</body>
</head>
</html>关于html - 如何将表单内容放在 Bootstrap 的同一行中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48084304/