Question

我是html / css的初学者，我通过引导程序封面示例（http://getbootstrap.com/examples/cover/）实现了一个站点。我对Home，Features和Contatc页面使用相同的布局。但在功能页面中，我有一个更大的内容需要滚动。但是这个css不允许这样做，导致元素位于中心，页面保持浏览器屏幕的大小。我想改变，以便页面根据我添加的内容（没有固定大小）保持相同的布局样式增长，并且我在测试中遇到的另一个问题是导航栏已修复并且在内容上在滚动期间。

CSS：

/*
 * Globals
 */

/* Links */
a,
a:focus,
a:hover {
  color: #fff;
}

/* Custom default button */
.btn-default,
.btn-default:hover,
.btn-default:focus {
  color: #333;
  text-shadow: none; /* Prevent inheritance from `body` */
  background-color: #fff;
  border: 1px solid #fff;
}


/*
 * Base structure
 */

html,
body {

height: 1000px;
/*
padding-bottom: 70px;
padding-top: 70px;*/
  background-color: #333;
}
body {
  color: #fff;
  text-align: center;
  text-shadow: 0 1px 3px rgba(0,0,0,.5);
}

/* Extra markup and styles for table-esque vertical and horizontal centering */
.site-wrapper {
  display: table;
  width: 100%;
  height: 100%; /* For at least Firefox */
  min-height: 100%;
  -webkit-box-shadow: inset 0 0 100px rgba(0,0,0,.5);
          box-shadow: inset 0 0 100px rgba(0,0,0,.5);
}
.site-wrapper-inner {
  display: table-cell;
  vertical-align: top;
}
.cover-container {
  margin-right: auto;
  margin-left: auto;
}

/* Padding for spacing */
.inner {
  padding: 30px;
}


/*
 * Header
 */
.masthead-brand {
  margin-top: 10px;
  margin-bottom: 10px;
}

.masthead-nav > li {
  display: inline-block;
}
.masthead-nav > li + li {
  margin-left: 20px;
}
.masthead-nav > li > a {
  padding-right: 0;
  padding-left: 0;
  font-size: 16px;
  font-weight: bold;
  color: #fff; /* IE8 proofing */
  color: rgba(255,255,255,.75);
  border-bottom: 2px solid transparent;
}
.masthead-nav > li > a:hover,
.masthead-nav > li > a:focus {
  background-color: transparent;
  border-bottom-color: #a9a9a9;
  border-bottom-color: rgba(255,255,255,.25);
}
.masthead-nav > .active > a,
.masthead-nav > .active > a:hover,
.masthead-nav > .active > a:focus {
  color: #fff;
  border-bottom-color: #fff;
}

@media (min-width: 768px) {
  .masthead-brand {
    float: left;
  }
  .masthead-nav {
    float: right;
  }
}


/*
 * Cover
 */

.cover {
  padding: 0 20px;
}
.cover .btn-lg {
  padding: 10px 20px;
  font-weight: bold;
}


/*
 * Footer
 */

.mastfoot {
  color: #999; /* IE8 proofing */
  color: rgba(255,255,255,.5);
}


/*
 * Affix and center
 */

@media (min-width: 768px) {
  /* Pull out the header and footer */
  .masthead {
    position: fixed;
    top: 0;
  }
  .mastfoot {
    position: fixed;
    bottom: 0;
  }
  /* Start the vertical centering */
  .site-wrapper-inner {
    vertical-align: middle;
  }
  /* Handle the widths */
  .masthead,
  .mastfoot,
  .cover-container {
    width: 100%; /* Must be percentage or pixels for horizontal alignment */
  }
}

@media (min-width: 992px) {
  .masthead,
  .mastfoot,
  .cover-container {
    width: 700px;
  }
}

HTML：

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
    <meta name="description" content="">
    <meta name="author" content="">
    <link rel="icon" href="../../favicon.ico">

    <title>Cover Template for Bootstrap</title>

    <!-- Bootstrap core CSS -->
    <link href="../../dist/css/bootstrap.min.css" rel="stylesheet">

    <!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
    <link href="../../assets/css/ie10-viewport-bug-workaround.css" rel="stylesheet">

    <!-- Custom styles for this template -->
    <link href="cover.css" rel="stylesheet">

    <!-- Just for debugging purposes. Don't actually copy these 2 lines! -->
    <!--[if lt IE 9]><script src="../../assets/js/ie8-responsive-file-warning.js"></script><![endif]-->
    <script src="../../assets/js/ie-emulation-modes-warning.js"></script>

    <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
    <!--[if lt IE 9]>
      <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
      <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
    <![endif]-->
  </head>

  <body>

    <div class="site-wrapper">

      <div class="site-wrapper-inner">

        <div class="cover-container">

          <div class="masthead clearfix">
            <div class="inner">
              <h3 class="masthead-brand">Cover</h3>
              <nav>
                <ul class="nav masthead-nav">
                  <li class="active"><a href="#">Home</a></li>
                  <li><a href="#">Features</a></li>
                  <li><a href="#">Contact</a></li>
                </ul>
              </nav>
            </div>
          </div>

          <div class="inner cover">
            <h1 class="cover-heading">Cover your page.</h1>
            <p class="lead">Cover is a one-page template for building simple and beautiful home pages. Download, edit the text, and add your own fullscreen background photo to make it your own.</p>
            <p class="lead">
              <a href="#" class="btn btn-lg btn-default">Learn more</a>
            </p>
          </div>

          <div class="mastfoot">
            <div class="inner">
              <p>Cover template for <a href="http://getbootstrap.com">Bootstrap</a>, by <a href="https://twitter.com/mdo">@mdo</a>.</p>
            </div>
          </div>

        </div>

      </div>

    </div>

    <!-- Bootstrap core JavaScript
    ================================================== -->
    <!-- Placed at the end of the document so the pages load faster -->
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
    <script>window.jQuery || document.write('<script src="../../assets/js/vendor/jquery.min.js"><\/script>')</script>
    <script src="../../dist/js/bootstrap.min.js"></script>
    <!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
    <script src="../../assets/js/ie10-viewport-bug-workaround.js"></script>
  </body>
</html>

Answer 1

您在媒体查询中有一些fixed position导致此问题。

评论@media (min-width: 768px)内的以下属性：

.masthead {
    /* position: fixed; */
    /* top: 0; */
}
.mastfoot {
    /* position: fixed; */
    /* bottom: 0; */
}

<强> ---> Check working Fiddle here <---

注意我向background: gray添加了body只是为了查看nav链接。

向下滚动到：

滚动示例Cover bootstrap

1 个答案: