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Bootstrap Carousel - 如何在幻灯片之间缓慢淡入淡出
[英] Bootstrap Carousel - how to fade between slides slowly
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问题描述
我使用的是最新的 Bootstrap Carousel，需要在幻灯片之间缓慢淡入淡出(大约 5 秒).我看过很多例子，并试图实现这个 一个.问题是幻灯片之间的淡入淡出太快(不到一秒).我如何将其更改为更长的淡入淡出?
这是我的代码:
<div class="carousel-inner" role="listbox"><!-- 幻灯片 1 --><div class="item item-1 slide-image active"><img class="img-responsive bg-item parallax" data-speed="1" data-width="1980" data-height="1485" src="~/images/slideshow/bottle1.png" alt=幻灯片 1 背景"><div class="carousel-caption"><h1 class="title">标题 1</h1>
<!-- 结束幻灯片 1 --><!-- 幻灯片 2 --><div class="item item-2 slide-image"><img class="img-responsive bg-item parallax" data-speed="1" data-width="1980" data-height="1485" src="~/images/slideshow/bottle2.jpg" alt=幻灯片 2 背景"><div class="carousel-caption"><h1 class="title">或者瓶子！</h1>
<!-- 结束幻灯片 2 -->
这是CSS:
.carousel-inner >.物品 {不透明度:0；顶部:0；左:0；宽度:100%；显示:块；位置:绝对；z-索引:0；-webkit-transition:不透明度 5s 缓解；-o-transition:不透明度 5s 缓和；过渡:不透明度 5s 缓和；-webkit-transform: translate3d(0, 0, 0) !important;变换:translate3d(0, 0, 0) !important;}.carousel-inner >.item:first-of-type {位置:相对；}.carousel-inner >.积极的 {不透明度:1；z-索引:3；}.carousel-inner >.next.left,.carousel-inner >.prev.right {-webkit-transition:不透明度 0.6s 缓入缓出；-o-transition:不透明度 0.6s 缓入缓出；过渡:不透明度 0.6 秒缓入缓出；不透明度:1；左:0；z-索引:2；}.carousel-inner >.active.left,.carousel-inner >.active.right {z-索引:1；}.carousel-control {z-索引:4；}
解决方案
解决方案非常重要，正如我已故的伟大的计算机科学教授曾经说过的那样.Slick Carousel(Bootstrap Carousel 的衍生物)使用 class="sld-transition-2" (三个可用类之一)在 body 标签上设置轮播的过渡.这与我试图设置的淡入淡出过渡相冲突.所以它被删除了.
CSS3 解决方案提供了此处来自此 Stackoverflow 答案 @transportedman 是关键.我根据我们的要求对其进行了一些修改，并将其放置在要为站点加载的最后一个 CSS 文件中(以覆盖它之前的所有内容):
/*灵感来自 http://codepen.io/Rowno/pen/Afykbhttps://stackoverflow.com/questions/26770055/bootstrap-carousel-fade-no-longer-working-with-maxcdn-3-3-bootstrap-min-css*/.carousel-fade .carousel-inner .item {不透明度:0；过渡属性:不透明度；过渡持续时间:4s；转换时序函数:线性；}.carousel-fade .carousel-inner .active {不透明度:1；}.carousel-fade .carousel-inner .active.left,.carousel-fade .carousel-inner .active.right {左:0；不透明度:0；z-索引:1；}.carousel-fade .carousel-inner .next.left,.carousel-fade .carousel-inner .prev.right {不透明度:1；}.carousel-fade .carousel-control {z-索引:2；}/*3.3 中的新功能:添加了转换以提高现代浏览器中的轮播性能."现在覆盖现代浏览器的 3.3 新样式 &应用不透明度*/@media all 和 (transform-3d), (-webkit-transform-3d) {.carousel-fade .carousel-inner >.item.next,.carousel-fade .carousel-inner >.item.active.right {不透明度:0；-webkit-transform: translate3d(0, 0, 0);变换:translate3d(0, 0, 0);}.carousel-fade .carousel-inner >.item.prev,.carousel-fade .carousel-inner >.item.active.left {不透明度:0；-webkit-transform: translate3d(0, 0, 0);变换:translate3d(0, 0, 0);}.carousel-fade .carousel-inner >.item.next.left,.carousel-fade .carousel-inner >.item.prev.right,.carousel-fade .carousel-inner >.item.active {不透明度:1；-webkit-transform: translate3d(0, 0, 0);变换:translate3d(0, 0, 0);}}
最后但并非最不重要的是，修改轮播 DIV 标签以具有 data-interval 属性，该属性大于上述 CSS3 中设置的 transition-duration:
.....
希望这能帮助遇到类似问题的其他人.
I'm using the latest Bootstrap Carousel and need to fade slowly (about 5s) between slides. I've looked at a number of examples, and have tried to implement this one. The problem is that the fade between slides is too quick (less than a second). How do I change that to a longer fade?
Here's my code:
<div class="carousel slide" id="slideshow-carousel-1" data-ride="carousel">
<div class="carousel-inner" role="listbox">
<!-- Slide 1 -->
<div class="item item-1 slide-image active">
<img class="img-responsive bg-item parallax" data-speed="1" data-width="1980" data-height="1485" src="~/images/slideshow/bottle1.png" alt="Slide 1 Background">
<div class="carousel-caption">
<h1 class="title">Caption 1</h1>
</div>
</div>
<!-- End Slide 1 -->
<!-- Slide 2 -->
<div class="item item-2 slide-image">
<img class="img-responsive bg-item parallax" data-speed="1" data-width="1980" data-height="1485" src="~/images/slideshow/bottle2.jpg" alt="Slide 2 Background">
<div class="carousel-caption">
<h1 class="title">Or Bottle!</h1>
</div>
</div>
<!-- End Slide 2 -->
</div>
</div>
Here's the CSS:
.carousel-inner > .item {
opacity: 0;
top: 0;
left: 0;
width: 100%;
display: block;
position: absolute;
z-index: 0;
-webkit-transition: opacity 5s ease;
-o-transition: opacity 5s ease;
transition: opacity 5s ease;
-webkit-transform: translate3d(0, 0, 0) !important;
transform: translate3d(0, 0, 0) !important;
}
.carousel-inner > .item:first-of-type {
position: relative;
}
.carousel-inner > .active {
opacity: 1;
z-index: 3;
}
.carousel-inner > .next.left,
.carousel-inner > .prev.right {
-webkit-transition: opacity 0.6s ease-in-out;
-o-transition: opacity 0.6s ease-in-out;
transition: opacity 0.6s ease-in-out;
opacity: 1;
left: 0;
z-index: 2;
}
.carousel-inner > .active.left,
.carousel-inner > .active.right {
z-index: 1;
}
.carousel-control {
z-index: 4;
}
解决方案
The solution was non-trivial, as my late, great computer science professor used to say. The Slick Carousel (a derivative of the Bootstrap Carousel) uses class="sld-transition-2" (one of three available classes) on the body tag to set the carousel's transition. This was colliding with the fade transition I was trying to set. So it was removed.
The CSS3 solution provided here from this Stackoverflow answer by @transportedman was the clincher. I made some modifications to it for our requirements and placed it in the last CSS file to be loaded for the site (to override everything that came before it):
/*
inspired from http://codepen.io/Rowno/pen/Afykb
https://stackoverflow.com/questions/26770055/bootstrap-carousel-fade-no-longer-working-with-maxcdn-3-3-bootstrap-min-css
*/
.carousel-fade .carousel-inner .item {
opacity: 0;
transition-property: opacity;
transition-duration: 4s;
transition-timing-function:linear;
}
.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);
}
}
Last but not least, modified the carousel DIV tag to have the data-interval attribute, which is bigger than the transition-duration set in the above CSS3:
<div class="carousel slide carousel-fade" id="slideshow-carousel-1" data-ride="carousel" data-interval="7000">
.....
</div>
Hope this helps others who run into similar issues.
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