Bootstrap 轮播全屏答案

【问题标题】：Bootstrap Carousel Full ScreenBootstrap 轮播全屏
【发布时间】：2013-04-27 09:13:28
【问题描述】：

我试图让引导轮播中的图像显示全屏，但无法弄清楚，我已经研究了一段时间并且完全卡住了。现在我只有一张图片，但一旦它工作，我会添加更多......

<!DOCTYPE html>

<html lang="en">
  <head>
    <meta charset="utf-8">
    <title>Carousel Template &middot; Bootstrap</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="">
    <meta name="author" content="">

    <!-- Le styles -->
    <link href="../assets/css/bootstrap.css" rel="stylesheet">
    <link href="../assets/css/bootstrap-responsive.css" rel="stylesheet">
    <style>

    /* GLOBAL STYLES
    -------------------------------------------------- */
    /* Padding below the footer and lighter body text */

    body {
      color: #5a5a5a;
      height: 100%;
      width: 100%;
      min-height: 100%;
    }



    /* CUSTOMIZE THE NAVBAR
    -------------------------------------------------- */

    /* Special class on .container surrounding .navbar, used for positioning it into place. */
    .navbar-wrapper {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      z-index: 10;
      margin-top: 20px;
    }
    .navbar-wrapper .navbar {

    }

    /* Remove border and change up box shadow for more contrast */
    .navbar .navbar-inner {
      border: 0;
      -webkit-box-shadow: 0 2px 10px rgba(0,0,0,.25);
         -moz-box-shadow: 0 2px 10px rgba(0,0,0,.25);
              box-shadow: 0 2px 10px rgba(0,0,0,.25);
    }

    /* Downsize the brand/project name a bit */
    .navbar .brand {
      padding: 14px 20px 16px; /* Increase vertical padding to match navbar links */
      font-size: 16px;
      font-weight: bold;
      text-shadow: 0 -1px 0 rgba(0,0,0,.5);
    }

    /* Navbar links: increase padding for taller navbar */
    .navbar .nav > li > a {
      padding: 15px 20px;
    }

    /* Offset the responsive button for proper vertical alignment */
    .navbar .btn-navbar {
      margin-top: 10px;
    }



    /* CUSTOMIZE THE CAROUSEL
    -------------------------------------------------- */

    /* Carousel base class */
    .carousel {
      margin-bottom: 0px;
    }

    .carousel .container {
      position: relative;
      z-index: 9;
    }

    .carousel .item {
      height: 100%;
    }

    .carousel-inner {
      overflow:hidden;
      width: 100%;
      min-height: 100%;
      position:relative;
    }

    .carousel img {
      position: absolute;
      top: 0;
      left: 0;
      min-width: 100%;
      min-height: 100%;
    }

    .carousel-caption {
      background-color: transparent;
      position: static;
      max-width: 550px;
      padding: 0 20px;
      margin-top: 200px;
    }
    .carousel-caption h1,
    .carousel-caption .lead {
      margin: 0;
      line-height: 1.25;
      color: #fff;
      text-shadow: 0 1px 1px rgba(0,0,0,.4);
    }
    .carousel-caption .btn {
      margin-top: 10px;
    }


    /* RESPONSIVE CSS
    -------------------------------------------------- */

    @media (max-width: 979px) {

      .container.navbar-wrapper {
        margin-bottom: 0;
        width: auto;
      }
      .navbar-inner {
        border-radius: 0;
        margin: -20px 0;
      }

      .carousel img {
        width: auto;
        height: 500px;
      }

      .featurette {
        height: auto;
        padding: 0;
      }
      .featurette-image.pull-left,
      .featurette-image.pull-right {
        display: block;
        float: none;
        max-width: 40%;
        margin: 0 auto 20px;
      }
    }


    @media (max-width: 767px) {

      .navbar-inner {
        margin: -20px;
      }

      .carousel {
        margin-left: -20px;
        margin-right: -20px;
      }
      .carousel img {
        height: 300px;
      }
      .carousel-caption {
        width: 65%;
        padding: 0 70px;
        margin-top: 100px;
      }
      .carousel-caption h1 {
        font-size: 30px;
      }
      .carousel-caption .lead,
      .carousel-caption .btn {
        font-size: 18px;
      }

      .marketing .span4 + .span4 {
        margin-top: 40px;
      }

      .featurette-heading {
        font-size: 30px;
      }
      .featurette .lead {
        font-size: 18px;
        line-height: 1.5;
      }

    }
    </style>

    <!-- HTML5 shim, for IE6-8 support of HTML5 elements -->
    <!--[if lt IE 9]>
      <script src="../assets/js/html5shiv.js"></script>
    <![endif]-->

    <!-- Fav and touch icons -->
    <link rel="apple-touch-icon-precomposed" sizes="144x144" href="../assets/ico/apple-touch-icon-144-precomposed.png">
    <link rel="apple-touch-icon-precomposed" sizes="114x114" href="../assets/ico/apple-touch-icon-114-precomposed.png">
      <link rel="apple-touch-icon-precomposed" sizes="72x72" href="../assets/ico/apple-touch-icon-72-precomposed.png">
                    <link rel="apple-touch-icon-precomposed" href="../assets/ico/apple-touch-icon-57-precomposed.png">
                                   <link rel="shortcut icon" href="../assets/ico/favicon.png">
  </head>

  <body>



    <!-- NAVBAR
    ================================================== -->
    <div class="navbar-wrapper">
      <!-- Wrap the .navbar in .container to center it within the absolutely positioned parent. -->
      <div class="container">

        <div class="navbar navbar-inverse">
          <div class="navbar-inner">
            <!-- Responsive Navbar Part 1: Button for triggering responsive navbar (not covered in tutorial). Include responsive CSS to utilize. -->
            <button type="button" class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
              <span class="icon-bar"></span>
              <span class="icon-bar"></span>
              <span class="icon-bar"></span>
            </button>
            <a class="brand" href="#">Treyca</a>
            <!-- Responsive Navbar Part 2: Place all navbar contents you want collapsed withing .navbar-collapse.collapse. -->
            <div class="nav-collapse collapse">
              <ul class="nav">
                <li class="active"><a href="#">Home</a></li>
                <li><a href="#about">About</a></li>
                <li><a href="fluid.html">Beta</a></li>
                <li><a href="#contact">Contact</a></li>
                <!-- Read about Bootstrap dropdowns at http://twitter.github.com/bootstrap/javascript.html#dropdowns -->
                <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 class="divider"></li>
                    <li class="nav-header">Nav header</li>
                    <li><a href="#">Separated link</a></li>
                    <li><a href="#">One more separated link</a></li>
                  </ul>
                </li>
              </ul>
            </div><!--/.nav-collapse -->
          </div><!-- /.navbar-inner -->
        </div><!-- /.navbar -->

      </div> <!-- /.container -->
    </div><!-- /.navbar-wrapper -->



    <!-- Carousel
    ================================================== -->
    <div id="myCarousel" class="carousel slide">
      <div class="carousel-inner">
        <div class="item active">
          <img src="../assets/img/examples/Bar-1.jpg" alt="">
          <div class="container">
            <div class="carousel-caption">
              <h1>Example headline.</h1>
              <p class="lead">Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
              <a class="btn btn-large btn-primary" href="#">Sign up today</a>
            </div>
          </div>
        </div>
      </div>
      <!-- FOOTER -->
      <footer>
        <p>&copy; 2013 Company, Inc. &middot; <a href="#">Privacy</a> &middot; <a href="#">Terms</a></p>
      </footer>
    </div><!-- /.carousel -->

    <!-- Le javascript
    ================================================== -->
    <!-- Placed at the end of the document so the pages load faster -->
    <script src="../assets/js/jquery.js"></script>
    <script src="../assets/js/bootstrap-transition.js"></script>
    <script src="../assets/js/bootstrap-alert.js"></script>
    <script src="../assets/js/bootstrap-modal.js"></script>
    <script src="../assets/js/bootstrap-dropdown.js"></script>
    <script src="../assets/js/bootstrap-scrollspy.js"></script>
    <script src="../assets/js/bootstrap-tab.js"></script>
    <script src="../assets/js/bootstrap-tooltip.js"></script>
    <script src="../assets/js/bootstrap-popover.js"></script>
    <script src="../assets/js/bootstrap-button.js"></script>
    <script src="../assets/js/bootstrap-collapse.js"></script>
    <script src="../assets/js/bootstrap-carousel.js"></script>
    <script src="../assets/js/bootstrap-typeahead.js"></script>
    <script>
      !function ($) {
        $(function(){
          // carousel demo
          $('#myCarousel').carousel()
        })
      }(window.jQuery)
    </script>
    <script src="../assets/js/holder/holder.js"></script>

    <style>
        body {
                background-color: black;
                color: #FFFFFF;
            }
    </style>
  </body>
</html>

【问题讨论】：

标签： twitter-bootstrap carousel

【解决方案1】：

更新 Bootstrap 4

Bootstrap 4 具有utility classes，可以更轻松地创建全屏轮播。例如，在carousel-item 内容上使用min-vh-100 类...

<div class="carousel slide" data-ride="carousel">
      <div class="carousel-inner bg-info" role="listbox">
            <div class="carousel-item active">
                <div class="d-flex align-items-center justify-content-center min-vh-100">
                    <h1 class="display-1">ONE</h1>
                </div>
            </div>
      </div>
</div>

Full screen carousel demo

这有助于使轮播项目全屏，但包含具有特定尺寸和纵横比的图像或视频的轮播项目需要进一步考虑。

由于视口的高/宽比可能与图像或视频的高/宽比不同，因此通常使用背景图像或object-fit 将图像和视频的大小调整为“全屏”。对于视频，请根据视频比例（21:9、19:9 等...）的需要使用 Bootstrap responsive embed classes。

Full screen videos demo

另见：https://stackoverflow.com/a/58765043/171456

原始答案（引导程序 3）

确保轮播项目内的 img 设置为 100% 的高度和宽度。您还必须确保轮播和任何 .item 容器（html、body）都是 100%...

html,body{height:100%;}
.carousel,.item,.active{height:100%;}
.carousel-inner{height:100%;}

Boostrap 3 Full Screen Carousel Demo

以下是 Bootstrap 3.x 的示例： http://www.codeply.com/go/2tVXo3mAtV

【讨论】：

Bootstrap 5 的更新？

【解决方案2】：

我就是这样做的。如果纵横比允许，这会使幻灯片中的图像占据全屏，否则会缩小。

.carousel {
    height: 100vh;
    width: 100%;
    overflow:hidden;
}
.carousel .carousel-inner {
    height:100%;    
}

要始终获得全屏幻灯片，无论屏幕纵横比如何，您还可以使用 object-fit：（不适用于 IE 或 Edge）

.carousel .carousel-inner img {
    display:block;
    object-fit: cover;
}

【讨论】：

【解决方案3】：

我在 startbootstrap.com 上找到了答案。试试这个代码：

CSS

html,
body {
    height: 100%;
}

.carousel,
.item,
.active {
    height: 100%;
}


.carousel-inner {
    height: 100%;
}

/* Background images are set within the HTML using inline CSS, not here */

.fill {
    width: 100%;
    height: 100%;
    background-position: center;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    background-size: cover;
    -o-background-size: cover;
}

footer {
    margin: 50px 0;
}

HTML

   <div class="carousel-inner">
        <div class="item active">
            <!-- Set the first background image using inline CSS below. -->
            <div class="fill" style="background-image:url('http://placehold.it/1900x1080&text=Slide One');"></div>
            <div class="carousel-caption">
                <h2>Caption 1</h2>
            </div>
        </div>
        <div class="item">
            <!-- Set the second background image using inline CSS below. -->
            <div class="fill" style="background-image:url('http://placehold.it/1900x1080&text=Slide Two');"></div>
            <div class="carousel-caption">
                <h2>Caption 2</h2>
            </div>
        </div>
        <div class="item">
            <!-- Set the third background image using inline CSS below. -->
            <div class="fill" style="background-image:url('http://placehold.it/1900x1080&text=Slide Three');"></div>
            <div class="carousel-caption">
                <h2>Caption 3</h2>
            </div>
        </div>
    </div>

Source

【讨论】：

【解决方案4】：

您可以做到这一点，而无需将 html 和 body 强加给我 100% 的高度。改为使用视口高度。还有鼠标滚轮控制。

function debounce(func, wait, immediate) {
  var timeout;
  return function() {
    var context = this,
      args = arguments;
    var later = function() {
      timeout = null;
      if (!immediate) func.apply(context, args);
    };
    var callNow = immediate && !timeout;
    clearTimeout(timeout);
    timeout = setTimeout(later, wait);
    if (callNow) func.apply(context, args);
  };
}

var slider = document.getElementById("demo");
var onScroll = debounce(function(direction) {
  //console.log(direction);
  if (direction == false) {
  	$('.carousel-control-next').click();
  } else {
  	$('.carousel-control-prev').click();
  }
}, 100, true);

slider.addEventListener("wheel", function(e) {
  e.preventDefault();
  var delta;
  if (event.wheelDelta) {
    delta = event.wheelDelta;
  } else {
    delta = -1 * event.deltaY;
  }

  onScroll(delta >= 0);
});

.carousel-item {
  height: 100vh;
  background: #212121;
}

.carousel-control-next,
.carousel-control-prev {
  width: 8% !important;
}

.carousel-item.active,
.carousel-item-left,
.carousel-item-right {
  display: flex !important;
  justify-content: center;
  align-items: center;
}

.carousel-item h1 {
    color: #fff;
    font-size: 72px;
    padding: 0 10%;
 }

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>


<div id="demo" class="carousel slide" data-ride="carousel" data-interval="false">

  <!-- The slideshow -->
  <div class="carousel-inner">
    <div class="carousel-item active">
      <h1 class="display-1 text-center">Lorem ipsum dolor sit amet adipisicing</h1>
    </div>
    <div class="carousel-item">
      <h1 class="display-1 text-center">Inventore omnis odio, dolore culpa atque?</h1>
    </div>
    <div class="carousel-item">
     <h1 class="display-1 text-center">Lorem ipsum dolor sit</h1>
    </div>
  </div>

  <!-- Left and right controls -->
  <a class="carousel-control-prev" href="#demo" data-slide="prev">
    <span class="carousel-control-prev-icon"></span>
  </a>
  <a class="carousel-control-next" href="#demo" data-slide="next">
    <span class="carousel-control-next-icon"></span>
  </a>

</div>

【讨论】：

【解决方案5】：

我也遇到了同样的问题，我尝试了上面的答案，但我想要更薄的东西，然后我尝试一个一个地更改选项，发现我们只需要添加

.carousel {
  height: 100%;
}

【讨论】：

请解释您是如何得出答案的，而不是仅仅给出答案，以便其他人可以从中学习。
为我工作！但我认为您也应该更改图像的尺寸，.. 对我来说，我将所有图像更改（或裁剪）为 1280 的比例：720