如何在 Bootstrap 轮播中不同高度的元素之间平滑过渡

Question

我正在为项目构建 Bootstrap 轮播。幻灯片的内容有不同的高度。目前，不同大小内容的过渡动画非常不稳定。我想知道是否有任何方法可以解决此过渡问题，并在旋转木马调整幻灯片之间的高度时使其变得更多 graceful/smooth。

*请注意，我想保持幻灯片之间的不同高度。出于对项目至关重要的原因，它们以这种方式调整大小。

Please see an example of the choppy transition on JS Bin.

这是轮播的代码：

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Bootstrap Carousel</title>
  <!-- Latest compiled and minified CSS -->
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
  <!-- Optional theme -->
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
  <!-- jQuery -->
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
  <!-- Latest compiled and minified JavaScript -->
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
  </head>
<body>

<div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
  <!-- Indicators -->
  <ol class="carousel-indicators">
    <li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
    <li data-target="#carousel-example-generic" data-slide-to="1"></li>
    <li data-target="#carousel-example-generic" data-slide-to="2"></li>
  </ol>

  <!-- Wrapper for slides -->
  <div class="carousel-inner" role="listbox">
    <div class="item active">
      <img style="margin: 0 auto;" src="http://placehold.it/300x300">
    </div>
    <div class="item">
      <img style="margin: 0 auto;" src="http://placehold.it/250x250">
    </div>
    <div class="item">
      <img style="margin: 0 auto;" src="http://placehold.it/160x600">
    </div>
  </div>

      <!-- Controls -->
      <a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
    <span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
    <span class="sr-only">Previous</span>
  </a>
  <a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
    <span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
    <span class="sr-only">Next</span>
  </a>
</div>

</body>
</html>

Answer 1

由于翻译的原因，它被砍掉了很多left/right所以如果你把它去掉它应该会好很多。

.carousel-inner .item {
  opacity: 0;
  transition: none;
  transform: translate3d(0,0,0) !important;
}

.carousel-inner .active {
  transition: opacity 1s ease-in-out;
  opacity: 1;
}

但如果你的意思是在不同图像尺寸之间设置动画高度，你可以使用这个 jQuery:

$('.carousel').carousel().on('slide.bs.carousel', function (e) {
    var nextH = $(e.relatedTarget).height();
    $(this).find('.active.item').parent().animate({
        height: nextH
    }, 1000);
});

CODEPEN

Answer 2

您可以使用 javascript 的另一种方法。

Example

在该代码中，我为从 bootstrap 触发的侦听 slide.bs.carousel 添加事件侦听器，获取活动项目的高度，然后为 carousel-inner 元素高度设置动画。

Answer 3

<div class="item active">
  <div class="img" style="background-image:url('http://placehold.it/300x300')"></div>
</div>
<div class="item">
  <div class="img" style="background-image:url('http://placehold.it/250x250')"></div>
</div>
<div class="item">
  <div class="img" style="background-image:url('http://placehold.it/160x600')"></div>
</div>

添加样式

.item .img {
   height:600px; //Maximum height
   background-repeat:no-repeat;
   background-position:center center;
}

如何在 Bootstrap 轮播中不同高度的元素之间平滑过渡

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