如何在 Bootstrap 4 轮播中制作全角背景图像？
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【中文标题】如何在 Bootstrap 4 轮播中制作全角背景图像？【英文标题】：How to make background image in Bootstrap 4 carousel full-width? 【发布时间】：2017-07-31 03:44:38 【问题描述】：我有一个用 Bootstrap 4 编写的 2 幻灯片轮播。每张幻灯片都有一个图像作为其背景，但我无法将这些图像设置为全宽。
通常我会使用background-size: cover、background-attachment: fixed; 和background-repeat: no-repeat 在网页上实现类似的效果，但我无法使用轮播。
我的代码如下。我尝试将背景大小、附件和封面应用于以下类：.carousel、.carousel-inner、.carousel-item 和 img 在轮播中。
<div id="officeCarousel" class="carousel slide" data-ride="carousel" style="width:100%;">
<ol class="carousel-indicators">
<li data-target="#officeCarousel" data-slide-to="0" class="active"></li>
<li data-target="#officeCarousel" data-slide-to="1"></li>
</ol>
<div class="carousel-inner" role="listbox">
<div class="carousel-item active">
<img class="d-block img-fluid" src="office1.png" >
<div class="carousel-caption d-none d-md-block">
<div class="card card-inverse card-success mb-3 text-center">
<div class="card-block">
<h4 class="card-title">Office 1</h4>
<p class="card-text">Work from the heart of the newly renovated area.</p>
<a href="#" class="card-link">About this office</a>
<a href="#" class="card-link">Book this office</a>
</div>
</div>
</div>
</div>
<div class="carousel-item">
<img class="d-block img-fluid" src="office2.jpg" >
<div class="carousel-caption d-none d-md-block">
<div class="card card-inverse card-success mb-3 text-center">
<div class="card-block">
<h4 class="card-title">Office 2</h4>
<p class="card-text">Work from this inner-city rural village.</p>
<a href="#" class="card-link">About this office</a>
<a href="#" class="card-link">Book this office</a>
</div>
</div>
</div>
</div>
</div>
<a class="carousel-control-prev" href="#officeCarousel" role="button" data-slide="prev" >
<span class="carousel-control-prev-icon" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next" href="#officeCarousel" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
非常感谢任何帮助！
编辑：下面相关部分的 CSS。这是默认的 V4 Bootstrap CSS。
.carousel
position: relative;
.carousel-inner
position: relative;
width: 100%;
overflow: hidden
.carousel-item
position: relative;
display: none;
width: 100%
【问题讨论】：
也许你也可以包含 CSS？ 确保轮播不在容器中，因为它有一个最大宽度。 ZimSystem，绝对！我现在将编辑我的原始问题以包含 CSS。 【参考方案1】：这里有一个很好的答案，包括工作演示： https://startbootstrap.com/template-overviews/full-slider/
将以下内容放入 html 页面（您需要下载 Bootstrap 4 或将链接替换为 CDN）：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>Full Slider - Start Bootstrap Template</title>
<!-- Bootstrap core CSS -->
<link href="../Content/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="../Scripts/bootstrap.bundle.min.js"></script>
</head>
<body>
<style>
.carousel-item
height: 100%;
min-height: 300px;
background: no-repeat center center scroll;
background-size: cover;
</style>
<div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
<ol class="carousel-indicators">
<li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
<li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
<li data-target="#carouselExampleIndicators" data-slide-to="2"></li>
</ol>
<div class="carousel-inner" role="listbox">
<!-- Slide One - Set the background image for this slide in the line below -->
<div class="carousel-item active" style="background-image: url('http://placehold.it/1900x1080')">
<div class="carousel-caption d-none d-md-block">
<h3>First Slide</h3>
<p>This is a description for the first slide.</p>
</div>
</div>
<!-- Slide Two - Set the background image for this slide in the line below -->
<div class="carousel-item" style="background-image: url('http://placehold.it/1900x1080')">
<div class="carousel-caption d-none d-md-block">
<h3>Second Slide</h3>
<p>This is a description for the second slide.</p>
</div>
</div>
<!-- Slide Three - Set the background image for this slide in the line below -->
<div class="carousel-item" style="background-image: url('http://placehold.it/1900x1080')">
<div class="carousel-caption d-none d-md-block">
<h3>Third Slide</h3>
<p>This is a description for the third slide.</p>
</div>
</div>
</div>
<a class="carousel-control-prev" href="#carouselExampleIndicators" role="button" data-slide="prev">
<span class="carousel-control-prev-icon" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next" href="#carouselExampleIndicators" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
</body>
</html>
【讨论】：
提供的链接已过时。 对我不起作用，但我的默认 Bootstrap Carousel HTML 看起来有点不同。以上是关于如何在 Bootstrap 4 轮播中制作全角背景图像？的主要内容，如果未能解决你的问题，请参考以下文章
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