如何缩小bootstrap轮播中的图像

I am trying to build a carousel which acts as a background image cover for my website kind of of like revolutionary slider in wordpress but not a plugin. Iam building it just for my static website. The problem is that some my images are different height and widths so the carousel doesn't adjust properly. for example img no. 1 is 2048*3072 px 2nd is 3072*2048 px and so on.I want to make my carousel height and width to be 100% like a cover image. when i do set min-width and height to be 100% and 100vh respectively the images gets cropped from the bottom. any help? Here is my code

我正在尝试构建一个旋转木马，作为我的网站的背景图像封面类似于wordpress中的革命性滑块，但不是插件。我只为我的静态网站建立它。问题是我的一些图像的高度和宽度不同，因此旋转木马不能正确调整。例如img no。 1是2048 * 3072 px 2nd是3072 * 2048 px等等。我想让我的旋转木马高度和宽度像封面图像一样100％。当我将min-width和height分别设置为100％和100vh时，图像从底部被裁剪。任何帮助？这是我的代码

 <!--carousel-->
<div id="myCarousel" class="carousel slide" data-ride="carousel">
 <!-- 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>
     <li data-target="#myCarousel" data-slide-to="3"></li>
    </ol>

    <!-- Wrapper for slides -->
     <div class="carousel-inner" role="listbox">
     <div class="item active">
     <img class ="fill"src="img/msp_0409_3522.jpg" alt="Chania">
    </div>

     <div class="item">
      <img class ="fill" src="img/msp_0406_1786.jpg" alt="Chania">
     </div>

     <div class="item">
      <img class ="fill" src="img/msp_1608_9566.jpg" alt="Flower">
     </div>

    <div class="item">
     <img class ="fill" src="img/msp_1605_6918.jpg" alt="Flower">
    </div>
    </div>

    <!-- Left and right controls -->
    <a class="left carousel-control" href="#myCarousel" 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="#myCarousel" 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

  html,body{
  height:100%;
  }
  .carousel,.item,.active{
 height:100%;
   }
 .carousel-inner{
 height:100%;
 }
 .fill{
  width:100%;
  height:100%;
  background-position:center
  ;background-size:cover;
  }

3 个解决方案

#1

In your code it looks like .carousel-inner>.item>img is overriding your fill class. In order to override the bootstrap property add an !important to your class.

在您的代码中，它看起来像.carousel-inner> .item> img正在覆盖您的填充类。为了覆盖bootstrap属性，在类中添加！important。

.fill {
    width: 100%;
    height: 100% !important;
}

You also do not need the background-position or background-size as they only style background images

您也不需要背景位置或背景大小，因为它们只设置背景图像的样式

Code Pen link

Code Pen链接

#2

you should use object-fit property. You can try something like that:

你应该使用object-fit属性。你可以试试这样的东西：

.carousel-inner img {
  object-fit: contain;
}

https://css-tricks.com/almanac/properties/o/object-fit/

#3

for background image, you can use:

对于背景图片，您可以使用：

background-image: url("image.jpg");
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;

#1