自举肚脐在塌陷时高度增加

Question

我是新的引导和有一个问题，保持线高度时，崩溃这些页眉和页脚肚脐.

<nav class="navbar navbar-fixed-top navbar-inverse">
      <div class="container-fluid no-padding">

<!-- header navbar -->
<div class="navbar-header">
          <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar" style = "line-height: 30px;">
            <span class="sr-only">Toggle navigation</span>
            <span class="glyphicon glyphicon-menu-hamburger"></span>
          </button>
          <a href="#" class="pull-left">
            <img height="35px;" src="image/companyLogo.png" style="margin-left: 5px;">
          </a> 
         <a class="navbar-brand" href="#" style = "line-height: 30px; margin-left: 1px;">Company Name</a> 
</div>

<!-- footer navbar -->
<div class="nav navbar-default navbar-fixed-bottom" style="background-color: #ADD6FF; font-size: 11px;">
          <ul class="nav navbar-nav" style = "float:right;">
            <li><a href="#">Copyright &#169; 2015</a></li>
          </ul>
</div>

这些CSS覆盖..。

.navbar-nav li a {
 line-height: 20px;
}

.navbar-header {
 line-height: 30px;
}

不管我将CSS设置为什么，当页面折叠时，它们总是会增加(从外观上看大约是5-10像素)。因此，我一直在搜索默认的引导css文件，寻找在折叠时添加的某种填充变量，但是找不到任何东西。

你知道我在这里做错了什么吗？甚至是一个更好的方法来尝试隔离问题的一般想法？我还应该补充说，我下载了一个30 of导航栏高度的自定义引导版本。

谢谢你的任何想法！

Answer 1

线的高度问题不是切换本身，它是从被取代的糖图标，使肚脐向下推，一旦你低于768 it。

至于正在重新定位的其他元素(如图像)，这是因为您正在从container-fluid中移除填充，以及将图像放置在标头中的位置。在默认情况下，所有这些都与视口有关，所以如果不考虑它们，它可能会变得很混乱。

还有一些CSS规则似乎是重复的/多余的，因此也存在一些冲突(或者没有达到正确的选择器)。见例子。

​

html {
  position: relative;
  min-height: 100%;
}
body,
html {
  margin-top: 125px;
  margin-bottom: 50px;
}
.footer {
  vertical-align: center;
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 50px;
  background-color: #ADD6FF;
  padding: 12px 0;
}
ul.footer-nav > li {
  margin-top: 5px;
  list-style: none;
  vertical-align: center;
  text-align: right;
}
ul.footer-nav > li > a {
  text-decoration: none;
  color: #444444;
}
.navbar.navbar-custom {
  border-radius: 0px;
  background: #33CC33;
  border: 1px solid #FFFFFF;
}
.navbar-custom .navbar-nav > li > a {
  color: #fff;
}
.navbar-custom .navbar-brand {
  color: #fff;
}
.navbar-custom .navbar-logo {
  float: left;
  margin-left: 15px;
}
.navbar-custom .navbar-header .navbar-toggle {
  background: none;
  border: none;
  line-height: 20px;
  padding-bottom: 0;
}
.navbar-custom .navbar-header .navbar-toggle:hover,
.navbar-custom .navbar-header .navbar-toggle:focus {
  background: none;
  border: none;
}
.navbar-custom .navbar-header .navbar-toggle .glyphicon-menu-hamburger,
.navbar-custom .navbar-header .navbar-toggle .glyphicon-menu-hamburger:hover,
.navbar-custom .navbar-toggle .navbar-header .glyphicon-menu-hamburger:focus {
  color: #F0C425;
}
.navbar-custom .navbar-header .navbar-toggle .navbar-custom .navbar-right {
  margin-right: 15px;
}
.navbar-default .lower-nav {
  border: none;
  border-radius: 0px;
  background: #ADD6FF;
  border: none;
  margin-bottom: 0;
}
.navbar-default .lower-nav .nav-buttons {
  margin: 5px 10px;
  top: 5px;
  border-radius border-radius: 0px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet" />
<div class="container-fluid">
  <nav class="navbar navbar-default navbar-custom navbar-fixed-top" role="navigation">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-navbar"> <span class="sr-only">Toggle navigation</span>
        <span class="glyphicon glyphicon-menu-hamburger"></span>

      </button>
      <a class="navbar-logo" href="#">
        <img src="http://placehold.it/100x50/ff0/ff0">
      </a><a class="navbar-brand" href="#">Brand</a>

    </div>
    <div class="collapse navbar-collapse" id="bs-navbar">
      <ul class="nav navbar-nav">
        <li><a href="#">Home</a>

        </li>
        <li><a href="#">About</a>

        </li>
        <li><a href="#">Contact</a>

        </li>
      </ul>
    </div>
    <nav class="navbar navbar-default lower-nav" role="navigation">
      <div class="btn-group pull-left">
        <div class="btn btn-link nav-buttons"><span class="glyphicon glyphicon-search"></span>

        </div>
        <div class="btn btn-link nav-buttons"><span class="glyphicon glyphicon-cloud"></span>

        </div>
        <div class="btn btn-link nav-buttons"><span class="glyphicon glyphicon-th"></span>

        </div>
      </div>
    </nav>
  </nav>
</div>
<div class="container">
  <div class="alert alert-info"> <a href="http://getbootstrap.com//">Bootstrap 3</a> 
  </div>
  <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras ultrices enim id tortor tincidunt, eget mollis mauris gravida. Mauris sem leo, feugiat ut felis blandit, imperdiet egestas orci. Proin lacinia at massa fermentum facilisis. Donec laoreet
    facilisis nunc, sed posuere magna rhoncus sed. Interdum et malesuada fames ac ante ipsum primis in faucibus. Praesent augue ipsum, rhoncus vel tempus sed, vehicula non purus. Nunc sit amet consectetur risus. Integer eget justo ut sapien consectetur
    auctor id eu augue. Quisque ac elit congue, eleifend lectus a, tempor purus. In hac habitasse platea dictumst. Phasellus gravida massa arcu, sed sodales orci interdum vel. Curabitur ullamcorper leo mauris, ut interdum felis mollis id. Nunc porttitor
    egestas fringilla. Suspendisse volutpat sem quis sagittis fermentum. Fusce in laoreet elit. Etiam aliquam varius tincidunt.</p>
  <p>Nunc nisi justo, ultricies at lobortis et, fermentum at dolor. Nulla ultrices erat et erat egestas, in luctus justo pellentesque. In convallis purus ut pellentesque interdum. Curabitur in neque lectus. Nullam lobortis sodales elit, eu fringilla eros
    aliquet vel. Aliquam ac ipsum vel nunc vestibulum luctus nec sit amet mauris. Ut viverra ornare risus eu condimentum. Fusce sollicitudin volutpat nisl id dignissim. Sed malesuada dui at magna imperdiet, non accumsan odio imperdiet. Etiam tristique
    fermentum enim, vel dictum nulla fermentum ac. Etiam in bibendum nisi. Vestibulum neque lectus, vehicula eu sagittis ut, blandit sit amet mi.</p>
  <p>Maecenas lacinia vestibulum magna. Integer mollis varius ullamcorper. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Nullam sit amet tortor turpis. Cras pharetra tellus elit, nec iaculis erat pellentesque
    sit amet. Nullam varius felis vel velit fermentum, nec facilisis erat accumsan. Nullam facilisis orci quam, eget semper turpis dictum id. Aenean magna ante, lobortis id sollicitudin quis, dapibus nec nisi. Maecenas aliquet posuere lectus, a ultricies
    arcu sodales sodales. Proin dignissim facilisis consectetur. Pellentesque suscipit quis dui eget malesuada. Quisque cursus neque a faucibus egestas. Phasellus sed nulla scelerisque diam adipiscing suscipit. Etiam sit amet enim ultricies risus consequat
    vestibulum eu sit amet urna.</p>
  <p>Vivamus hendrerit eget augue viverra auctor. Praesent mi leo, facilisis vel nisi vitae, sodales rhoncus augue. Maecenas purus nunc, commodo at massa eu, blandit aliquet enim. Proin sem neque, imperdiet non arcu eu, sagittis malesuada est. Fusce enim
    neque, facilisis et mattis ut, vulputate sed justo. Vivamus elementum elit nunc, eget tempor erat adipiscing nec. Praesent vestibulum dapibus vehicula. Pellentesque viverra faucibus leo in ornare. Sed sodales faucibus tincidunt. Vivamus dignissim
    tristique libero sit amet aliquet. Donec ut nunc dolor. Duis molestie tortor mi, id auctor nisi ullamcorper et. Proin eu ante cursus, varius felis id, porta orci.</p>
  <p>Aliquam imperdiet scelerisque purus, nec sagittis mi auctor vitae. Maecenas sodales scelerisque massa, vitae iaculis neque tincidunt sed. Vivamus id imperdiet lectus. Fusce id tellus ut tellus volutpat hendrerit in at justo. Duis eu tempus nibh. Nunc
    consectetur euismod sapien, eget placerat metus tempor sit amet. Maecenas at sem ac purus dictum viverra. Praesent eu neque in metus congue dictum eu in dolor. Mauris a elit sem. Quisque non velit malesuada ligula aliquet lacinia. Donec congue, leo
    lacinia vulputate pulvinar, est justo venenatis nisi, sit amet condimentum massa sem sed urna. Duis eget pretium eros. Sed et rutrum leo, sit amet sollicitudin urna. Nullam dui augue, malesuada sed lectus sed, malesuada fringilla massa.</p>
  <div class="alert alert-danger"> <a href="#">Start the Footer</a> 
  </div>
</div>
<footer class="footer">
  <div class="container">
    <ul class="footer-nav">
      <li><a href="#">Copyright &#169; 2015</a>

      </li>
    </ul>
  </div>
</footer>

​

Answer 2

.navbar-toggle变得可见，它的大小和边距导致.navbar增长。

在代码页中，.navbar-header的样式如下：

@media (min-width: 768px)
{
  margin-right: 0;
  margin-left: 0;
}

.navbar-header
{
  margin-right: -15px;
  margin-left: -15px;
}

导致徽标移动。