Question

我似乎无法完成这项工作。我想要一个简单的响应式登录页面，但表单不会停留在中心，它会一直向左移动。

为什么这不起作用？如果我把col分成3个4节，它应该留在中间吗？

<html>
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="css/bootstrap.min.css" type="text/css">
    <meta charset="utf-8">
    <title>Login</title>
  </head>
<body style="background-color: #4b5257">
  <div class="container">
    <div class="col-lg-4"></div>
    <div class="col-lg-4">
      <div class="jumbotron" style="margin-top:150px">
        <h3>Please login</h3>
        <form action="Dashboard.jsp">
          <div class="form-group">
            <input type="email" class="form-control" placeholder="Enter Username">
          </div>
          <div class="form-group">
            <input type="password" class="form-control" placeholder="Enter password">
          </div>
          <div class="custom-checkbox">
            <label><input type="checkbox"> Remember me</label>
          </div>
          <button type="submit" class="btn-primary form-control">Login</button>
        </form>
      </div>
    </div>
    <div class="col-lg-4"></div>
  </div>
</body>
</html>

Answer 1

我添加了一个名为col-centered的类。你可以在下面看到一个例子。

<html>
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" type="text/css">
    <meta charset="utf-8">
    <title>Login</title>
    
<style>
    .col-centered{
    float: none;
    margin: 0 auto;
}
</style>
  </head>
<body style="background-color: #4b5257">
  <div class="container">
  <div class="col-xs-12 col-sm-8 col-md-4 col-lg-4 col-centered">
  <div class="jumbotron">
        <h3>Please login</h3>
        <form action="Dashboard.jsp">
          <div class="form-group">
            <input type="email" class="form-control" placeholder="Enter Username">
          </div>
          <div class="form-group">
            <input type="password" class="form-control" placeholder="Enter password">
          </div>
          <div class="custom-checkbox">
            <label><input type="checkbox"> Remember me</label>
          </div>
          <button type="submit" class="btn-primary form-control">Login</button>
        </form>
      </div>
  </div>
  
  </div>
</body>
</html>

使用Bootstrap的简单登录页面

1 个答案: