【发布时间】：2019-04-13 22:20:28
【问题描述】：
我想在页面中间显示我的login/Signup 选项卡及其相关表单，并且还想要像col-md-12 到col-md-4 这样的小文本文件，但是当我使用style="margin-left=200px;" 时，表单将在中间但是在移动模式下它没有显示所以我删除了style="margin-left=200px;"
html,
body {
height: 100%;
}
body {
display: -ms-flexbox;
display: flex;
-ms-flex-align: center;
align-items: center;
padding-top: 40px;
padding-bottom: 40px;
background-color: #f5f5f5;
}
.form-signin {
width: 100%;
max-width: 330px;
padding: 15px;
margin: auto;
}
.form-signin .checkbox {
font-weight: 400;
}
.form-signin .form-control {
position: relative;
box-sizing: border-box;
height: auto;
padding: 10px;
font-size: 16px;
}
.form-signin .form-control:focus {
z-index: 2;
}
.form-signin input[type="email"] {
margin-bottom: -1px;
border-bottom-right-radius: 0;
border-bottom-left-radius: 0;
}
.form-signin input[type="password"] {
margin-bottom: 10px;
border-top-left-radius: 0;
border-top-right-radius: 0;
}<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
<div class="container">
<br>
<h4 class="text-center">User Panel</h4>
<hr>
<!-- Nav tabs -->
<ul class="nav nav-tabs form-signin" role="tablist">
<li class="nav-item">
<a class="nav-link active" data-toggle="tab" href="#home">Login</a>
</li>
<li class="nav-item">
<a class="nav-link" data-toggle="tab" href="#menu2">SignUp</a>
</li>
</ul>
<!-- Tab panes -->
<div class="tab-content">
<div id="home" class="container tab-pane active"><br>
<form class="form-signin">
<img class="mb-4" src="https://camu.in/assets/img/avatar1.svg" alt="" width="72" height="72">
<h1 class="h3 mb-3 font-weight-normal">Please sign in</h1>
<label for="inputEmail" class="sr-only">Email address</label>
<input type="email" id="inputEmail" class="form-control" placeholder="Email address" required autofocus>
<label for="inputPassword" class="sr-only">Password</label>
<input type="password" id="inputPassword" class="form-control" placeholder="Password" required>
<div class="checkbox mb-3">
<label>
<input type="checkbox" value="remember-me"> Remember me
</label>
</div>
<button class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button>
<p class="mt-5 mb-3 text-muted">© 2017-2018</p>
</form>
</div>
<div id="menu2" class="container tab-pane fade"><br>
<p>Signup</p>
<form class="form-signin">
<img class="mb-4" src="https://camu.in/assets/img/avatar1.svg" alt="" width="72" height="72">
<h1 class="h3 mb-3 font-weight-normal">Please sign in</h1>
<label for="inputEmail" class="sr-only">Email address</label>
<input type="email" id="inputEmail" class="form-control" placeholder="Email address" required autofocus>
<label for="inputPassword" class="sr-only">Password</label>
<input type="password" id="inputPassword" class="form-control" placeholder="Password" required>
<div class="checkbox mb-3">
<label>
<input type="checkbox" value="remember-me"> Remember me
</label>
</div>
<button class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button>
<p class="mt-5 mb-3 text-muted">© 2017-2018</p>
</form>
</div>
</div>
</div>我想在页面中间输出下面的选项卡和表单，但我做不到。请检查下面的图片我想要什么。另外，当我点击SignUp 时，一切都搞砸了。
【问题讨论】：
-
将
justify-content-center类添加到您的<ul>中，选项卡将居中。 -
请检查 this 回答。运行 sn -p 看看是不是你想要的。
标签： html css forms bootstrap-4