引导轮播拉伸图像



我在使用引导程序时轮播图像滑块的大小有问题。

我尝试使用内联 css 更改图像的高度,但图像仍然被拉伸。

<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
</head>
<body>
<div id="carouselExampleControls" class="carousel slide" data-ride="carousel">
<div class="col-sm-6">
<div class="carousel-inner">
<div class="carousel-item active">
<img style="min-height: 250px;" class="d-block w-100" src="images/hikvision.png" alt="First slide">
</div>
<div class="carousel-item">
<img style="min-height: 250px;" class="d-block w-100" src="images/hikvision_2.png" alt="Second slide">
</div>
<div class="carousel-item">
<img class="d-block w-100 h-25" src="images/hikvision_3.png" alt="Third slide">
</div>
</div>
<a class="carousel-control-prev" href="#carouselExampleControls" 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="#carouselExampleControls" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
</body>
</html>

尽管缺少图像(因为它们存储在本地计算机上(,但我可以看到您使用的是最小高度。

min-height 属性定义元素的最小高度。
如果内容小于最小高度,则将应用最小高度。
如果内容大于最小高度,则 min-height 属性不起作用。

w3schools
使用[最大]高度,你可能会得到你想要的。

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