Html 固定高度的 Bootstrap carousel：根据图像尺寸水平或垂直居中图像
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StackOverFlow
Bootstrap carousel with fixed height: center image horizontally or vertically based on image dimensions
提问by Graham Slick
I have a bootstrap carousel with a fixed height. Here is the CSS:
我有一个固定高度的引导传送带。这是CSS：
.carousel-custom .carousel-outer {
position: relative;
}
@media(min-width: 992px){
.carousel-custom {
margin-top: 20px;
.carousel-inner {
height: auto;
.item {
height:500px;
line-height:300px;
}
}
}
}
@media(max-width: 991px){
.carousel-custom {
margin-top: 20px;
.carousel-inner {
height: auto;
.item {
height:300px;
line-height:300px;
text-align:center;
}
}
}
}
And here is my markup:
这是我的标记：
<div id="carousel-custom-1188" class="carousel slide carousel-custom" data-ride="carousel">
<div class="carousel-outer">
<!-- Wrapper for slides -->
<div class="carousel-inner" role="listbox">
<div class="item active">
<img class="img-responsive" src="http://res.cloudinary.com/dltbqhact/image/upload/v1459261752/w8edcuvz1yl3uc4g4o34.jpg" alt="Jinallzupvfazqqr67nd">
<div class="carousel-caption"></div>
</div>
<div class="item">
<img class="img-responsive" src="http://res.cloudinary.com/dltbqhact/image/upload/v1459175684/w4ueot8o49dh2fyulv0x.jpg" alt="K1yov5hpur8mgsb9r15p">
<div class="carousel-caption"></div>
</div>
<div class="item">
<img class="img-responsive" src="http://res.cloudinary.com/dltbqhact/image/upload/v1459178926/fwlmuroj2wlz7czrsha0.jpg" alt="Lqfandhmutdkppjrl932">
<div class="carousel-caption"></div>
</div>
</div>
<!-- Controls -->
<a class="left carousel-control" href="#carousel-custom-1188" 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-custom-1188" role="button" data-slide="next">
<span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
<!-- Indicators -->
<ol class="carousel-indicators mCustomScrollbar">
<li data-target="#carousel-custom-1188" data-slide-to="0" class="active">
<img style="height:50px; width: 50px;" class="img-responsive" src="http://res.cloudinary.com/dltbqhact/image/upload/v1459268139/jinallzupvfazqqr67nd.png" alt="Jinallzupvfazqqr67nd">
</li>
<li data-target="#carousel-custom-1188" data-slide-to="1" class="">
<img style="height:50px; width: 50px;" class="img-responsive" src="http://res.cloudinary.com/dltbqhact/image/upload/v1459268146/k1yov5hpur8mgsb9r15p.png" alt="K1yov5hpur8mgsb9r15p">
</li>
<li data-target="#carousel-custom-1188" data-slide-to="2" class="">
<img style="height:50px; width: 50px;" class="img-responsive" src="http://res.cloudinary.com/dltbqhact/image/upload/v1459268157/lqfandhmutdkppjrl932.png" alt="Lqfandhmutdkppjrl932">
</li>
</ol>
</div>
</div>
The issue is that I have images that are very wide, others very narrow and high, and others with a good ration height/width in the same carousel.
问题是我的图像非常宽，其他图像非常窄和高，而其他图像在同一个轮播中具有良好的高度/宽度。
I'd like to have the wide images centered vertically (with a width of a 100%), high images centered horizontally (with a height of 100%) and "normal" images (with a decent ratio height/width) filling all the carousel.
我想让宽图像垂直居中（宽度为 100%），高图像水平居中（高度为 100%）和“正常”图像（高度/宽度比例合适）填充所有旋转木马。
Here is what I'm trying to do (first image is an example with a very wide image, second image with a very high one, and last one has a "decent" ratio).
这是我想要做的（第一张图像是一个非常宽的图像，第二张图像非常高，最后一张图像具有“体面”的比例）。
How could I achieve this ? I've tried Make Bootstrap's Carousel both center AND responsive?and other tricks found on Google but none did this.
我怎么能做到这一点？我试过使 Bootstrap 的旋转木马居中和响应？以及在谷歌上找到的其他技巧，但没有人这样做。
回答by DavidDomain
Since the .itemelements are relative positioned you could just position the imgelements absolutely. Giving the .itemelements a fixed height, will help to vertically and horizontally align the images inside.
由于.item元素是相对定位的，因此您可以img绝对定位元素。给.item元素一个固定的高度，将有助于垂直和水平对齐内部的图像。
I'm sure there are lots of different ways to do this, here is one example. Hope it helps.
我相信有很多不同的方法可以做到这一点，这里是一个例子。希望能帮助到你。
@import url('https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css');
body {
background-color: black;
}
.carousel-inner > .item {
height: 100vh;
}
.carousel-inner > .item > img {
position: absolute;
top: 50%;
left: 50%;
-webkit-transform: translate(-50%, -50%);
-ms-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
max-height: 800px;
width: auto;
}
.carousel-control.left,
.carousel-control.right {
background-image: none;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<div class="container">
<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>
<!-- inner -->
<div class="carousel-inner" role="listbox">
<div class="item active">
<img src="http://placehold.it/1200x600/2c3e50/000" alt="">
</div>
<div class="item">
<img src="http://placehold.it/600x1200/d35400/000" alt="">
</div>
<div class="item">
<img src="http://placehold.it/600x600/c0392b/000" alt="">
</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>
</div>回答by Craz1k0ek
Alright, I've been fiddling around for a while now. Ended up with the result below. Hope it helps and answers your question (at least for a small part).
好吧，我已经折腾了一段时间了。最终得到了下面的结果。希望它可以帮助并回答您的问题（至少在一小部分）。
<head>
<title>Bootstrap Carousel</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<style>
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;
}
.tester {
height: 100%;
}
</style>
</head>
<body>
<div class="tester">
<!-- Full Page Image Background Carousel Header -->
<header id="myCarousel" class="carousel slide">
<!-- Indicators -->
<ol class="carousel-indicators">
<li data-target="#myCarousel" data-slide-to="0" class="active"></li>
<li data-target="#myCarousel" data-slide-to="1"></li>
<li data-target="#myCarousel" data-slide-to="2"></li>
</ol>
<!-- Wrapper for Slides -->
<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://res.cloudinary.com/dltbqhact/image/upload/v1459268139/jinallzupvfazqqr67nd.png');"></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://res.cloudinary.com/dltbqhact/image/upload/v1459268146/k1yov5hpur8mgsb9r15p.png');"></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://res.cloudinary.com/dltbqhact/image/upload/v1459268157/lqfandhmutdkppjrl932.png');"></div>
<div class="carousel-caption">
<h2>Caption 3</h2>
</div>
</div>
</div>
<a class="left carousel-control" href="#myCarousel" data-slide="prev">
<span class="icon-prev"></span>
</a>
<a class="right carousel-control" href="#myCarousel" data-slide="next">
<span class="icon-next"></span>
</a>
</header>
<script>
$('.carousel').carousel({
interval: 5000 //changes the speed
})
</script>
</div>
</body>
Again, hope it helps!
再次，希望它有帮助！
回答by Ismail Farooq
simply use image on absolute if your slider height is fixed
如果滑块高度是固定的，只需使用绝对图像
<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">
<div class="middle">
<img src="http://placehold.it/1920x500">
</div>
</div>
<div class="item">
<div class="middle">
<img src="http://placehold.it/1920x300">
</div>
</div>
<div class="item">
<div class="middle">
<img src="http://placehold.it/600x900">
</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>
css
css
.carousel {
width: 500px; /*test width*/
height: 300px; /*what ever height */
}
.middle {
position: relative;
height: 300px; /*what ever height */
}
.middle img {
max-width: 100%;
max-height: 100%; /*what ever height */
margin: auto;
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
}
see fiddle
看小提琴
回答by SiD Devesh
If you try to achieve this in bootstrap carousel, you will end up with black bars in top and bottom...I was stuck with similar problem and ended up using "flickity" js library..it works lot better than tryig to achieve this on something not meant for this....
如果您尝试在 bootstrap carousel 中实现这一点，最终会在顶部和底部出现黑条……我遇到了类似的问题，最终使用了“flickity”js 库……它比 tryig 更好地实现这一目标在不适合这个的东西上......
