html - 粘性页脚导航栏和居中登录面板

Question

这个问题已经针对每个组件被问过好几次了，如下所示:

• 如何保持导航栏固定
• 如何固定页脚
• 如何让div在页面中间居中

我想要实现的是同时拥有所有东西

我想在页面中间(水平和垂直)居中放置一个登录面板，但页脚有一些问题

• 我希望该页面能够在手机上正确呈现。登录区域不应位于页眉或页脚下方。
• 当页面显示时，我希望显示页脚。目前我需要向下滚动才能看到页脚。登录表单和页脚之间的空间太大。页脚需要固定在底部。
• 如果可能，登录表单应该更宽和更高

谢谢你的帮助

这是我需要弄清楚如何配置的关键部分

/* Wrapper for page content to push down footer */
#wrap {
  min-height: 100%;
  height: 100%;
  /* Negative indent footer by its height */
  margin: 140px 0 -200px 0;
  /* Pad bottom by footer height */
  padding: 0;
}

请参阅 jfiddle here供您引用

此刻

___________________________________________________     _ Visible Page 
|Navbar                                           |      |
|                                                 |      |
|_________________________________________________|      |
|                                                 |      |
|                                                 |      |
|                                                 |      |
|                      ^                          |      |
|                      |  Too much space          |      |
|                      |                          |      |
|                                                 |      |
|                _______________                  |      |    
|               |               |                 |      |
|               |  Login Area   |                 |      |  
|               |_______________|                 |      |
|                                                 |      |
|                                                 |      |
|                                                 |      |
|                                                 |      |
|                      ^                          |     _| 
|                      |  Too much space          |
|                      |                          |
|                                                 |
|                                                 |
|                                                 |
|                                                 |
|                                                 |
|_________________________________________________|
| Footer                                          |
|_________________________________________________|

我想要什么

___________________________________________________     _ Visible Page 
|Navbar                                           |      |
|                                                 |      |
|_________________________________________________|      |
|                                                 |      |
|                                                 |      |
|                                                 |      |
|                                                 |      |
|              _____________________              |      |    
|             |                     |             |      |
|             |                     |             |      |
|             |    Login Area       |             |      |  
|             |                     |             |      |
|             |_____________________|             |      |
|                                                 |      |
|                                                 |      |
|                                                 |      |
|                                                 |      |
|_________________________________________________|      |
| Footer                                          |      |
|_________________________________________________|     _|

Answer 1

这就是您可以做到的。查看一个有效的 bootply 示例 here .

/* Sticky footer styles
-------------------------------------------------- */

html,
body {
  height: 100%;
  /* The html and body elements cannot have any padding or margin. */
}

/* Wrapper for page content to push down footer */
#wrap {
  min-height: 100%;
  height: auto !important;
  height: 100%;
  /* Negative indent footer by its height */
  margin: 0 auto -60px;
  /* Pad bottom by footer height */
  padding: 0 0 60px;
}

/* Set the fixed height of the footer here */
#footer {
  height: 60px;
  background-color: #f5f5f5;
}


/* Custom page CSS
-------------------------------------------------- */


#wrap > .container {
  padding: 60px 15px 0;
}
.container .credit {
  margin: 20px 0;
}

#footer > .container {
  padding-left: 15px;
  padding-right: 15px;
}

#footer {
	position: fixed;
    width: 100%;
    display: block;
    bottom: 0;
}

.center{
    position: absolute;
    height: 50px;
    width: 50px;
    background:red;
    top:calc(50% - 50px/2); /* height divided by 2*/
    left:calc(50% - 50px/2); /* width divided by 2*/
}

<!-- Wrap all page content here -->
<div id="wrap">
  
  <!-- Fixed navbar -->
  <div class="navbar navbar-default navbar-fixed-top">
    <div class="container">
      <div class="navbar-header">
        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
        </button>
        <a class="navbar-brand" href="#">Project name</a>
      </div>
      <div class="collapse navbar-collapse">
        <ul class="nav navbar-nav">
          <li class="active"><a href="#">Home</a></li>
          <li><a href="#about">About</a></li>
        </ul>
      </div><!--/.nav-collapse -->
    </div>
  </div>
  
  <!-- Begin page content -->
  <div class="container">
    <div class="center">
    	login goes here
    </div>
  </div>
</div>

<div id="footer">
  <div class="container">
    <p class="text-muted credit">Centered login footer.</p>
  </div>
</div>