jquery - Bootstrap 旋转木马淡入淡出不适用于图像。需要帮助理解为什么

Question

我正在尝试将轮播中的过渡从从左向右滑动更改为淡入淡出。我找到了多种资源，包括一些关于 SO 的答案，但没有一个对我有用，而且我不太明白我错过了什么。到目前为止，我看到的示例与我看到的示例之间的唯一区别是我在轮播和字幕中包含了图像。实现我在此处提供的答案中找到的代码后:Bootstrap carousel-fade no longer working with maxcdn 3.3.bootstrap.min.css

它没有任何区别，继续滑动而不是褪色。这是我的代码，希望有人能帮我解决这个问题。

HTML

    <!-- start -->
<div id="carousel-example-generic" class="carousel slide carousel-fade" 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>

  </ol>

  <!-- Wrapper for slides -->
  <div class="carousel-inner" role="listbox" >
    <div class="item active">
      <img src="images/nightscape3.png" alt="...">
      <div class="carousel-caption">
         <div class="about-name-div">
            <h1 >thin text<span>BOLD TEXT</span></h1>
            <p class="lead">THIS IS SOME TEXT</p>
         </div>
        <a class="btn btn-default" href="#about" role="button" id="aboutButton">LEARN MORE ABOUT US</a>
      </div>
    </div>
    <div class="item">
      <img src="images/tech.jpg" alt="...">
      <div class="carousel-caption">
      </div>
    </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>
<!-- end -->

CSS

.carousel-fade .carousel-inner .item {
  opacity: 0;
  transition-property: opacity;
}

.carousel-fade .carousel-inner .active {
  opacity: 1;
}

.carousel-fade .carousel-inner .active.left,
.carousel-fade .carousel-inner .active.right {
  left: 0;
  opacity: 0;
  z-index: 1;
}

.carousel-fade .carousel-inner .next.left,
.carousel-fade .carousel-inner .prev.right {
  opacity: 1;
}

.carousel-fade .carousel-control {
  z-index: 2;
}

/*
WHAT IS NEW IN 3.3: "Added transforms to improve carousel performance in modern browsers."
now override the 3.3 new styles for modern browsers & apply opacity
*/
@media all and (transform-3d), (-webkit-transform-3d) {
    .carousel-fade .carousel-inner > .item.next,
    .carousel-fade .carousel-inner > .item.active.right {
      opacity: 0;
      -webkit-transform: translate3d(0, 0, 0);
              transform: translate3d(0, 0, 0);
    }
    .carousel-fade .carousel-inner > .item.prev,
    .carousel-fade .carousel-inner > .item.active.left {
      opacity: 0;
      -webkit-transform: translate3d(0, 0, 0);
              transform: translate3d(0, 0, 0);
    }
    .carousel-fade .carousel-inner > .item.next.left,
    .carousel-fade .carousel-inner > .item.prev.right,
    .carousel-fade .carousel-inner > .item.active {
      opacity: 1;
      -webkit-transform: translate3d(0, 0, 0);
              transform: translate3d(0, 0, 0);
    }
}

Answer 1

我认为你也应该参加 position ( left ) 你的 .item的考虑。我还向 .anim 添加了一个附加类( <div class="carousel-inner" role="listbox" > )而不是带有 .carousel 的包装器类。

那么您应该可以使用如下所示的 CSS 代码:

@-webkit-keyframes fadeIn {
0% {opacity: 0;}
100% {opacity: 1;}
}
@keyframes fadeIn {
0% {opacity: 0;}
100% {opacity: 1;}
}

@-webkit-keyframes fadeOut {
  0% {opacity: 1;}
  100% {opacity: 0;}
}

@keyframes fadeOut {
  0% {opacity: 1;}
  100% {opacity: 0;}
}

.carousel-inner.anim > .item {
  left: 0;
}

.carousel-inner.anim > .next,
.carousel-inner.anim > .prev {
  position: absolute;
  top: 0;
  width: 100%;
}
.carousel-inner.anim > .next.left {

  -webkit-backface-visibility: visible;
          backface-visibility: visible;
  -webkit-animation-name: fadeIn;
          animation-name: fadeIn;
  -webkit-animation-duration:0.6s;
          animation-duration:0.6s;


}
.carousel-inner.anim > .prev.right {
  -webkit-animation-name: fadeIn;
          animation-name: fadeIn;
  -webkit-animation-duration:0.6s;
          animation-duration:0.6s;


}
.carousel-inner.anim > .active.left {
    -webkit-animation-name: fadeOut;
          animation-name: fadeOut;
  -webkit-animation-duration:0.6s;
          animation-duration:0.6s;


}
.carousel-inner.anim > .active.right {
        -webkit-animation-name: fadeOut;
          animation-name: fadeOut;
  -webkit-animation-duration:0.6s;
          animation-duration:0.6s;

}

以上适用于 v3.2。演示:http://www.bootply.com/7scRiubjja

从 v3.3 开始，轮播的 Less/CSS 代码已经更改。转换和转换包含在 @media all and (transform-3d), (-webkit-transform-3d) {} 中

要将上述内容用于 v3.3+，您应该使用上述媒体查询重写代码，或重置原始代码。可以使用以下 CSS 代码重置原始代码:

.carousel-inner > .item {
  -webkit-transition: none;
          transition: none;
}
@media all and (transform-3d), (-webkit-transform-3d) {
  .carousel-inner > .item {
    -webkit-transition: none;
            transition: none;
    -webkit-backface-visibility: hidden;
            backface-visibility: hidden;
    -webkit-perspective: 1000;
            perspective: 1000;
  }
  .carousel-inner > .item.next,
  .carousel-inner > .item.active.right {
    -webkit-transform: none;
        -ms-transform: none;
            transform: none;
    left: 0;
  }
  .carousel-inner > .item.prev,
  .carousel-inner > .item.active.left {
    -webkit-transform: none;
        -ms-transform: none;
            transform: none;
    left: 0;
  }
  .carousel-inner > .item.next.left,
  .carousel-inner > .item.prev.right,
  .carousel-inner > .item.active {
    -webkit-transform: none;
        -ms-transform: none;
            transform: none;
    left: 0;
  }
}

演示:http://www.bootply.com/PHBjOgJlIt

基于此处给出的答案Bootstrap carousel-fade no longer working with maxcdn 3.3.bootstrap.min.css你也可以重置:

.carousel-inner.anim > .item {
  left: 0;
  -webkit-transform: translate3d(0, 0, 0) !important;
          transform: translate3d(0, 0, 0) !important;
}