如何解决Boostrap 4 Carousel图片无法正确显示
我有一个bootstrap 4传送带，并且在其中添加了3张图像。 我也希望它们作为全屏轮播，轮播的高度是设备的高度，并且可以正常工作。 但是问题出在图像的宽度上，该宽度似乎是响应性的，并停留在转盘包装内，但是图像无法正确显示。图像似乎被裁切，无法正确显示完整图像。 在正常模式下查看时，轮播正常工作，但在移动视图中查看时，轮播图片似乎被裁剪了。这是我的代码
<html>
<head>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<!-- Popper JS -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<!-- Latest compiled JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
<style>
.full-screen {
background-size: cover;
background-position: center;
background-repeat: no-repeat;
}
</style>
</head>
<body>
<div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
<!-- Indicators -->
<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>
<!-- Wrapper for slides -->
<div class="carousel-inner">
<div class="carousel-item">
<img class="d-block w-100" src="images/banner-1.png"
data-color="lightblue" alt="First Image">
<div class="carousel-caption d-md-block">
</div>
</div>
<div class="carousel-item">
<img class="d-block w-100" src="images/banner-2.png" data-color="firebrick" alt="Second Image">
<div class="carousel-caption d-md-block">
</div>
</div>
<div class="carousel-item">
<img class="d-block w-100" src="images/banner-3.png" data-color="violet" alt="Third Image">
<div class="carousel-caption d-md-block">
</div>
</div>
</div>
<!-- Controls -->
<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>
<script>
var $item = $('.carousel-item');
var $wHeight = $(window).height();
$item.eq(0).addClass('active');
$item.height($wHeight);
$item.addClass('full-screen');
$('.carousel img').each(function() {
var $src = $(this).attr('src');
var $color = $(this).attr('data-color');
$(this).parent().css({
'background-image' : 'url(' + $src + ')','background-color' : $color
});
$(this).remove();
});
$(window).on('resize',function (){
$wHeight = $(window).height();
$item.height($wHeight);
});
$('.carousel').carousel({
interval: 1000,pause: "false"
});
</script>
```
以下是一些示例输出快照：
普通视图
解决方法
您需要添加移动查询以将图片的背景尺寸设置为“包含”，而不是在小屏幕上“覆盖”。
<style>
@media only screen and (min-width: 768px) {
.full-screen {
background-size: contain;
background-position: center;
background-repeat: no-repeat;
}
}
</style>
在background-size: cover; CSS中删除.full-screen并将其切换为background-size: contain;似乎可以解决我的问题。显然，您可以将其删除，并且图像会变小/原始尺寸。
var $item = $('.carousel-item');
var $wHeight = $(window).height();
$item.eq(0).addClass('active');
$item.height($wHeight);
$item.addClass('full-screen');
$('.carousel img').each(function() {
var $src = $(this).attr('src');
var $color = $(this).attr('data-color');
$(this).parent().css({
'background-image' : 'url(' + $src + ')','background-color' : $color
});
$(this).remove();
});
$(window).on('resize',function (){
$wHeight = $(window).height();
$item.height($wHeight);
});
$('.carousel').carousel({
interval: 1000,pause: "false"
});.full-screen {
background-size: contain;
background-position: center;
background-repeat: no-repeat;
}<head>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
</head>
<body>
<div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
<!-- Indicators -->
<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>
<!-- Wrapper for slides -->
<div class="carousel-inner">
<div class="carousel-item">
<img class="d-block w-100 img-fluid" src="https://www.drupal.org/files/drupal-wordmark.svg"
data-color="lightblue" alt="First Image">
<div class="carousel-caption d-md-block">
</div>
</div>
<div class="carousel-item">
<img class="d-block w-100 img-fluid" src="https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png" data-color="firebrick" alt="Second Image">
<div class="carousel-caption d-md-block">
</div>
</div>
<div class="carousel-item">
<img class="d-block w-100 img-fluid" src="images/banner-3.png" data-color="violet" alt="Third Image">
<div class="carousel-caption d-md-block">
</div>
</div>
</div>
<!-- Controls -->
<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>
<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<!-- Popper JS -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<!-- Latest compiled JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
</body>
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