Question

我正在尝试使用twitter bootstrap实现全身背景图像，但它无法正常工作我在全屏模式下检查它是在移动设备和平板电脑模式下工作。

这是html

    <div id="header">

  <nav class="navbar navbar-inverse navbar-fixed-top">
      <div class="container">
        <div class="navbar-header">
          <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
            <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="#">Hifzil</a>
        </div>
        <div id="navbar" class="collapse navbar-collapse">
          <ul class="nav navbar-nav">
            <li class="active"><a href="#">Home</a></li>
            <li><a href="#about">Spelling Test</a></li>
            <li><a href="#contact">Practise Writing</a></li>
           <li><a href="#about">Spelling Game</a></li>
            <li><a href="#contact">English Dictionary</a></li>
               <li><a href="#about">Games</a></li>
            <li><a href="#contact">Support</a></li>

         </ul>
              <ul class="nav navbar-nav navbar-right">
      <li><a href="#"><span class="glyphicon glyphicon-user"></span> Sign Up</a></li>
      <li><a href="#"><span class="glyphicon glyphicon-log-in"></span> Login</a></li>
    </ul>
        </div><!--/.nav-collapse -->
      </div>
    </nav>

        <div id="boundry">
        <div class="searchbutton">  <a href="dic.php">Click Here To Start E-learning Drive !</a></div>      

            </div>
            </div>


<div class="col-md-9 text-center col-centered">
<div class="grade-module intro1">  <a href="#" class="gradeStyle blue1-bg">English</a> <div class="bd-grade blue1-bdr">
            <p class="text">Counting objects, fewer and more, names of colors, inside and outside, longer and shorter, and more.</p>
        </div>
        </div>
        <div class="grade-module intro2">
          <a href="dic.php" class="gradeStyle orange1-bg">Dictionary</a> <div class="bd-grade orange-bdr"><p class="text">Learn New Words From Dictionary And Their Meanings,Parts Of Speeches And Their Visualization</p></div>
         </div>
         <div class="grade-module intro3">
          <a href="paint.php" class="gradeStyle green-bg">Speeling Practice</a> <div class="bd-grade green-bdr"><p class="text">Practice Speelings By Drawing The Words . All you have to paint inside the letter not outside</p></div>
         </div>
         <div class="grade-module intro4">
          <a href="#" class="gradeStyle red-bg">Quiz</a> <div class="bd-grade red-bdr"><p class="text">Speeling quiz can provide you the opportunity to revise whether you have correctly memorize or not </p></div>
         </div>
         <div class="grade-module intro5">
          <a href="#" class="gradeStyle light-bg">Games</a> <div class="bd-grade light-bdr"><p class="text">Learning by increasing vocubulary from playing games like words search , scrabble and letterrace .</p></div>
         </div>
           <div class="grade-module intro6">
          <a href="#" class="gradeStyle voilet-bg">Visualization</a> <div class="bd-grade voilet-bdr"><p class="text">Visualization of words tends to lead towards learning and memorizing the words , their description and meaning</p></div>
         </div>
</div>

这是css

#header{
    background: url('..images/english.jpg') no-repeat center top;
    padding-top: 200px;
    text-align: center;
    background-attachment: relative;
    background-position: center center;
    min-height: 670px;
    width: 100%;
    -webkit-background-size: 100%;
    -moz-background-size: 100%;
    -o-background-size: 100%;
    background-size: 100%;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;

}

Answer 1

使用position: absolute;即可。

使用保证金：100vh;在第二个div包含内容以获得你想要的东西，我想：

#content { margin-top: 100vh}

Updated fiddle

Answer 2

你可以这样做。

旁注，由于bkg定位，body的其他直接子项需要，或者它们显示在下方，因此添加了body > * { position: relative; }规则。

html, body {
  margin: 0;
}
body > * {
  position: relative;
}
#bkg {
  position: fixed;      /*  or use absolute if it should scroll with content  */
  left: 0; top: 0;
  right: 0; bottom: 0;
  background: url('http://lorempicsum.com/futurama/627/200/3') no-repeat center center;
  background-size: cover;
  opacity: 0.3;         /*  temp. added to make text appear better   */
}

<div id="bkg"></div>

<div id="header">

  <nav class="navbar navbar-inverse navbar-fixed-top">
    <div class="container">
      <div class="navbar-header">
        <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
          <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="#">Hifzil</a>
      </div>
      <div id="navbar" class="collapse navbar-collapse">
        <ul class="nav navbar-nav">
          <li class="active"><a href="#">Home</a></li>
          <li><a href="#about">Spelling Test</a></li>
          <li><a href="#contact">Practise Writing</a></li>
          <li><a href="#about">Spelling Game</a></li>
          <li><a href="#contact">English Dictionary</a></li>
          <li><a href="#about">Games</a></li>
          <li><a href="#contact">Support</a></li>

        </ul>
        <ul class="nav navbar-nav navbar-right">
          <li><a href="#"><span class="glyphicon glyphicon-user"></span> Sign Up</a></li>
          <li><a href="#"><span class="glyphicon glyphicon-log-in"></span> Login</a></li>
        </ul>
      </div><!--/.nav-collapse -->
    </div>
  </nav>

  <div id="boundry">
    <div class="searchbutton">  <a href="dic.php">Click Here To Start E-learning Drive !</a></div>      

  </div>
</div>


<div class="col-md-9 text-center col-centered">
  <div class="grade-module intro1">  <a href="#" class="gradeStyle blue1-bg">English</a> <div class="bd-grade blue1-bdr">
    <p class="text">Counting objects, fewer and more, names of colors, inside and outside, longer and shorter, and more.</p>
    </div>
  </div>
  <div class="grade-module intro2">
    <a href="dic.php" class="gradeStyle orange1-bg">Dictionary</a> <div class="bd-grade orange-bdr"><p class="text">Learn New Words From Dictionary And Their Meanings,Parts Of Speeches And Their Visualization</p></div>
  </div>
  <div class="grade-module intro3">
    <a href="paint.php" class="gradeStyle green-bg">Speeling Practice</a> <div class="bd-grade green-bdr"><p class="text">Practice Speelings By Drawing The Words . All you have to paint inside the letter not outside</p></div>
  </div>
  <div class="grade-module intro4">
    <a href="#" class="gradeStyle red-bg">Quiz</a> <div class="bd-grade red-bdr"><p class="text">Speeling quiz can provide you the opportunity to revise whether you have correctly memorize or not </p></div>
  </div>
  <div class="grade-module intro5">
    <a href="#" class="gradeStyle light-bg">Games</a> <div class="bd-grade light-bdr"><p class="text">Learning by increasing vocubulary from playing games like words search , scrabble and letterrace .</p></div>
  </div>
  <div class="grade-module intro6">
    <a href="#" class="gradeStyle voilet-bg">Visualization</a> <div class="bd-grade voilet-bdr"><p class="text">Visualization of words tends to lead towards learning and memorizing the words , their description and meaning</p></div>
  </div>
</div>

与twitter bootstrap的全身背景图像

2 个答案: