Question

我正在尝试使用导航栏创建一个完整的背景图片页面，该导航栏浮动在图像上方。

我遇到的问题是导航栏将图像向下推，图像设置在html元素的背景上，所以我不知道为什么导航栏会产生这种效果。

我只是直接在引导程序启动页面上使用css而没有导航栏图像适合整个页面，导航栏位于图像上方并将其推下：

的CSS：

html{
            /* This image will be displayed fullscreen */
            background:url('bg.jpg') no-repeat center center;

            /* Ensure the html element always takes up the full height of the browser window */
            min-height:100%;

            /* The Magic */
            background-size:cover;
        }

        body {
            /* Workaround for some mobile browsers */
            min-height:100%;    
            padding-top: 20px;
            padding-bottom: 20px;           
        }

        .navbar {
            margin-top: 0px;
            margin-bottom: 0px;
        }

HTML：

    <body>
    <div class="container">
        <nav class="navbar navbar-default navbar-custom" role="navigation">
            <div class="container-fluid">
              <!-- Brand and toggle get grouped for better mobile display -->
              <div class="navbar-header">
                <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
                  <span class="sr-only">Toggle navigation</span>
                  <span class="icon-bar"></span>
                  <span class="icon-bar"></span>
                  <span class="icon-bar"></span>
                </button>
                <a class="navbar-brand" href="#">Brand</a>
              </div>

              <!-- Collect the nav links, forms, and other content for toggling -->
              <div class="collapse navbar-collapse navbar-ex1-collapse">
                <ul class="nav navbar-nav">
                  <li class="active"><a href="#">Link 1</a></li>
                  <li><a href="#">Link 2</a></li>
                  <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
                    <ul class="dropdown-menu">
                      <li><a href="#">Action</a></li>
                      <li><a href="#">Another action</a></li>
                      <li><a href="#">Something else here</a></li>
                      <li><a href="#">Separated link</a></li>
                      <li><a href="#">One more separated link</a></li>
                    </ul>
                  </li>
                </ul>

                </div><!-- /.navbar-collapse -->
            </div>
        </nav>
    </div>

我想要最终得到的效果是整个页面的图像和导航栏位于其下方的图像，而不是向下推动图像，因此它在导航栏后开始。

Answer 1

将以下两行CSS应用于html元素的正文：

ArrayAdapter's

Answer 2

为body代码提供背景信息。

＆＃13;

html{

         height: 100%;
         width: 100%;

       }
        body {
            /* Workaround for some mobile browsers */
            min-height:100%;    
            padding-top: 20px;
            padding-bottom: 20px;
              /* This image will be displayed fullscreen */
            background:url('http://www.radioviva.fm.br/images/backgrounds/bg-squares-dark.jpg') no-repeat center center;

            /* Ensure the html element always takes up the full height of the browser window */
            min-height:100%;

            /* The Magic */
            background-size:cover;
        }

        }

        .navbar {
            margin-top: 0px;
            margin-bottom: 0px;
        }

＆＃13;

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
 <div class="container">
        <nav class="navbar navbar-default navbar-custom" role="navigation">
            <div class="container-fluid">
              <!-- Brand and toggle get grouped for better mobile display -->
              <div class="navbar-header">
                <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
                  <span class="sr-only">Toggle navigation</span>
                  <span class="icon-bar"></span>
                  <span class="icon-bar"></span>
                  <span class="icon-bar"></span>
                </button>
                <a class="navbar-brand" href="#">Brand</a>
              </div>

              <!-- Collect the nav links, forms, and other content for toggling -->
              <div class="collapse navbar-collapse navbar-ex1-collapse">
                <ul class="nav navbar-nav">
                  <li class="active"><a href="#">Link 1</a></li>
                  <li><a href="#">Link 2</a></li>
                  <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
                    <ul class="dropdown-menu">
                      <li><a href="#">Action</a></li>
                      <li><a href="#">Another action</a></li>
                      <li><a href="#">Something else here</a></li>
                      <li><a href="#">Separated link</a></li>
                      <li><a href="#">One more separated link</a></li>
                    </ul>
                  </li>
                </ul>

                </div><!-- /.navbar-collapse -->
            </div>
        </nav>
    </div>

＆＃13;

Answer 3

将您的背景添加到正文 - 而非html

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见这里：http://codepen.io/anthu/full/KVeOyV/

bootstrap-完整的背景图像与导航栏顶部

3 个答案: