Bootstrap5 图像不适合轮播内容的问题

Question

嘿，我正在为我的网页做轮播 bootstrap，但我对用户 upload.When 用户上传更大尺寸的图像的图像大小有疑问，它将显示在我的网页上.如何使图像大小遵循轮播的大小，即我的轮播宽度是视图屏幕的 100%？即使图片尺寸为正方形，轮播中的图片也会展开。

这是我的网页布局。

Webpage Screenshot

在我尝试添加 css.

的答案之一之后

    img.d-block{
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    }

变成这样

enter image description here

这是我的bootstrap5.css

.carousel {
    position: relative
}

.carousel.pointer-event {
    touch-action: pan-y
}

.carousel-inner {
    position: relative;
    width: 100%;
    height: 500px !important;
    overflow: hidden
}

.carousel-inner::after {
    display: block;
    clear: both;
    content: ""
}

.carousel-item {
    position: relative;
    display: none;
    float: left;
    width: 100%;
    margin-right: -100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    transition: transform .6s ease-in-out
}

@media (prefers-reduced-motion:reduce) {
    .carousel-item {
        transition: none
    }
}

.carousel-item-next,
.carousel-item-prev,
.carousel-item.active {
    display: block
}

.active.carousel-item-end,
.carousel-item-next:not(.carousel-item-start) {
    transform: translateX(100%)
}

.active.carousel-item-start,
.carousel-item-prev:not(.carousel-item-end) {
    transform: translateX(-100%)
}

.carousel-fade .carousel-item {
    opacity: 0;
    transition-property: opacity;
    transform: none
}

.carousel-fade .carousel-item-next.carousel-item-start,
.carousel-fade .carousel-item-prev.carousel-item-end,
.carousel-fade .carousel-item.active {
    z-index: 1;
    opacity: 1
}

.carousel-fade .active.carousel-item-end,
.carousel-fade .active.carousel-item-start {
    z-index: 0;
    opacity: 0;
    transition: opacity 0s .6s
}

@media (prefers-reduced-motion:reduce) {

    .carousel-fade .active.carousel-item-end,
    .carousel-fade .active.carousel-item-start {
        transition: none
    }
}

.carousel-control-next,
.carousel-control-prev {
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 15%;
    padding: 0;
    color: #fff;
    text-align: center;
    background: 0 0;
    border: 0;
    opacity: .5;
    transition: opacity .15s ease
}

@media (prefers-reduced-motion:reduce) {

    .carousel-control-next,
    .carousel-control-prev {
        transition: none
    }
}

.carousel-control-next:focus,
.carousel-control-next:hover,
.carousel-control-prev:focus,
.carousel-control-prev:hover {
    color: #fff;
    text-decoration: none;
    outline: 0;
    opacity: .9
}

.carousel-control-prev {
    left: 0
}

.carousel-control-next {
    right: 0
}

.carousel-control-next-icon,
.carousel-control-prev-icon {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    background-repeat: no-repeat;
    background-position: 50%;
    background-size: 100% 100%
}

.carousel-control-prev-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3cpath d='M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0z'/%3e%3c/svg%3e")
}

.carousel-control-next-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3cpath d='M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e")
}

.carousel-indicators {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 2;
    display: flex;
    justify-content: center;
    padding: 0;
    margin-right: 15%;
    margin-bottom: 1rem;
    margin-left: 15%;
    list-style: none
}

.carousel-indicators [data-bs-target] {
    box-sizing: content-box;
    flex: 0 1 auto;
    width: 30px;
    height: 3px;
    padding: 0;
    margin-right: 3px;
    margin-left: 3px;
    text-indent: -999px;
    cursor: pointer;
    background-color: #fff;
    background-clip: padding-box;
    border: 0;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    opacity: .5;
    transition: opacity .6s ease
}

@media (prefers-reduced-motion:reduce) {
    .carousel-indicators [data-bs-target] {
        transition: none
    }
}

.carousel-indicators .active {
    opacity: 1
}

.carousel-caption {
    position: absolute;
    right: 15%;
    bottom: 1.25rem;
    left: 15%;
    padding-top: 1.25rem;
    padding-bottom: 1.25rem;
    color: #fff;
    text-align: center
}

.carousel-dark .carousel-control-next-icon,
.carousel-dark .carousel-control-prev-icon {
    filter: invert(1) grayscale(100)
}

.carousel-dark .carousel-indicators [data-bs-target] {
    background-color: #000
}

.carousel-dark .carousel-caption {
    color: #000
}

那么这是我的index.blade.php

    <div id="carouselExampleIndicators" class="carousel slide" data-bs-ride="carousel">
    <div class="carousel-indicators">
      <button type="button" data-bs-target="#carouselExampleIndicators" data-bs-slide-to="0" class="active" aria-current="true" aria-label="Slide 1"></button>
      <button type="button" data-bs-target="#carouselExampleIndicators" data-bs-slide-to="1" aria-label="Slide 2"></button>
      <button type="button" data-bs-target="#carouselExampleIndicators" data-bs-slide-to="2" aria-label="Slide 3"></button>
    </div>
    <div class="carousel-inner">
      <div class="carousel-item active">
        <img src="{{ asset('assets/images/owl.png') }}" class="d-block w-100" alt="...">
      </div>
      <div class="carousel-item">
        <img src="{{ asset('assets/images/owl.png') }}" class="d-block w-100" alt="...">
      </div>
      <div class="carousel-item">
        <img src="{{ asset('assets/images/owl.png') }}" class="d-block w-100" alt="...">
      </div>
    </div>
    <button class="carousel-control-prev" type="button" data-bs-target="#carouselExampleIndicators" data-bs-slide="prev">
      <span class="carousel-control-prev-icon" aria-hidden="true"></span>
      <span class="visually-hidden">Previous</span>
    </button>
    <button class="carousel-control-next" type="button" data-bs-target="#carouselExampleIndicators" data-bs-slide="next">
      <span class="carousel-control-next-icon" aria-hidden="true"></span>
      <span class="visually-hidden">Next</span>
    </button>
  </div>

Answer 1

我将 height:100% 添加到 .carousel-item。并将这些样式添加到图像中：

 img.d-block{
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.carousel {
    position: relative
}

.carousel.pointer-event {
    touch-action: pan-y
}

.carousel-inner {
    position: relative;
    width: 100%;
    height: 500px !important;
    overflow: hidden
    background: lightblue;
}

.carousel-inner::after {
    display: block;
    clear: both;
    content: ""
}

.carousel-item {
    position: relative;
    display: none;
    float: left;
    width: 100%;
    margin-right: -100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    transition: transform .6s ease-in-out
    height: 100%;
}

img.d-block{
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

@media (prefers-reduced-motion:reduce) {
    .carousel-item {
        transition: none
    }
}

.carousel-item-next,
.carousel-item-prev,
.carousel-item.active {
    display: block
}

.active.carousel-item-end,
.carousel-item-next:not(.carousel-item-start) {
    transform: translateX(100%)
}

.active.carousel-item-start,
.carousel-item-prev:not(.carousel-item-end) {
    transform: translateX(-100%)
}

.carousel-fade .carousel-item {
    opacity: 0;
    transition-property: opacity;
    transform: none
}

.carousel-fade .carousel-item-next.carousel-item-start,
.carousel-fade .carousel-item-prev.carousel-item-end,
.carousel-fade .carousel-item.active {
    z-index: 1;
    opacity: 1
}

.carousel-fade .active.carousel-item-end,
.carousel-fade .active.carousel-item-start {
    z-index: 0;
    opacity: 0;
    transition: opacity 0s .6s
}

@media (prefers-reduced-motion:reduce) {

    .carousel-fade .active.carousel-item-end,
    .carousel-fade .active.carousel-item-start {
        transition: none
    }
}

.carousel-control-next,
.carousel-control-prev {
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 15%;
    padding: 0;
    color: #fff;
    text-align: center;
    background: 0 0;
    border: 0;
    opacity: .5;
    transition: opacity .15s ease
}

@media (prefers-reduced-motion:reduce) {

    .carousel-control-next,
    .carousel-control-prev {
        transition: none
    }
}

.carousel-control-next:focus,
.carousel-control-next:hover,
.carousel-control-prev:focus,
.carousel-control-prev:hover {
    color: #fff;
    text-decoration: none;
    outline: 0;
    opacity: .9
}

.carousel-control-prev {
    left: 0
}

.carousel-control-next {
    right: 0
}

.carousel-control-next-icon,
.carousel-control-prev-icon {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    background-repeat: no-repeat;
    background-position: 50%;
    background-size: 100% 100%
}

.carousel-control-prev-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3cpath d='M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0z'/%3e%3c/svg%3e")
}

.carousel-control-next-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3cpath d='M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e")
}

.carousel-indicators {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 2;
    display: flex;
    justify-content: center;
    padding: 0;
    margin-right: 15%;
    margin-bottom: 1rem;
    margin-left: 15%;
    list-style: none
}

.carousel-indicators [data-bs-target] {
    box-sizing: content-box;
    flex: 0 1 auto;
    width: 30px;
    height: 3px;
    padding: 0;
    margin-right: 3px;
    margin-left: 3px;
    text-indent: -999px;
    cursor: pointer;
    background-color: #fff;
    background-clip: padding-box;
    border: 0;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    opacity: .5;
    transition: opacity .6s ease
}

@media (prefers-reduced-motion:reduce) {
    .carousel-indicators [data-bs-target] {
        transition: none
    }
}

.carousel-indicators .active {
    opacity: 1
}

.carousel-caption {
    position: absolute;
    right: 15%;
    bottom: 1.25rem;
    left: 15%;
    padding-top: 1.25rem;
    padding-bottom: 1.25rem;
    color: #fff;
    text-align: center
}

.carousel-dark .carousel-control-next-icon,
.carousel-dark .carousel-control-prev-icon {
    filter: invert(1) grayscale(100)
}

.carousel-dark .carousel-indicators [data-bs-target] {
    background-color: #000
}

.carousel-dark .carousel-caption {
    color: #000
}

    <div id="carouselExampleIndicators" class="carousel slide" data-bs-ride="carousel">
    <div class="carousel-indicators">
      <button type="button" data-bs-target="#carouselExampleIndicators" data-bs-slide-to="0" class="active" aria-current="true" aria-label="Slide 1"></button>
      <button type="button" data-bs-target="#carouselExampleIndicators" data-bs-slide-to="1" aria-label="Slide 2"></button>
      <button type="button" data-bs-target="#carouselExampleIndicators" data-bs-slide-to="2" aria-label="Slide 3"></button>
    </div>
    <div class="carousel-inner">
      <div class="carousel-item active">
        <img src="https://picsum.photos/1250
" class="d-block w-100" alt="...">
      </div>
      <div class="carousel-item">
        <img src="https://picsum.photos/1230
" class="d-block w-100" alt="...">
      </div>
      <div class="carousel-item">
        <img src="https://picsum.photos/1240
" class="d-block w-100" alt="...">
      </div>
    </div>
    <button class="carousel-control-prev" type="button" data-bs-target="#carouselExampleIndicators" data-bs-slide="prev">
      <span class="carousel-control-prev-icon" aria-hidden="true"></span>
      <span class="visually-hidden">Previous</span>
    </button>
    <button class="carousel-control-next" type="button" data-bs-target="#carouselExampleIndicators" data-bs-slide="next">
      <span class="carousel-control-next-icon" aria-hidden="true"></span>
      <span class="visually-hidden">Next</span>
    </button>
  </div>

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