在图像的顶部刷卡使用文本响应图像

Question

我使用Swiper创造一些图像滑块，我试图在2个Flexbox的容器，我的图像是响应封闭滑块。

我想补充的图像，在图像的左上角对齐的顶部一些文本，这就是事事不顺心。

我相信我处理Flexbox的“问题”非常相似，Why don't flex items shrink past content size?在这种情况下，父亲DIV是保持原始图像的宽度。问题是在后的修复不会出现，一旦我<div class="img-wrapper">包装形象的工作。事实上，我也花了相当多的时间来研究的，并没有什么非常似乎得到它的工作就是我想要的。

这个问题是CSS object-fit: contain; is keeping original image width in layout 的叉子

注：在新窗口中打开下面的代码片段，看看这个问题。

var swiper = new Swiper('.swiper-container', {
  slidesPerView: 1,
  spaceBetween: 50,
  // init: false,
  pagination: {
    el: '.swiper-pagination',
    clickable: true,
  },
});

img {
  object-fit: contain;
  min-width: 0;
  height: 100%;
  max-width: 100%;
}

.img-num {
  float: left;
  position: absolute;
  padding-left: 10px;
  text-shadow: 1px 1px 2px black, 0 0 1em blue, 0 0 0.2em blue;
  color: white;
  font: 1.5em Georgia, serif;
}


.img-wrapper {
  border-style: solid;
  border-width: thin;
  height: 100%;
  object-fit: contain;
  min-width: 0;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  background: #eee;
  font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
  font-size: 14px;
  color: #000;
  margin: 0;
  padding: 0;
}

.page {
  height: 100%;
  display: flex;
}

.main-container {
  flex: 1 1 0;
  display: flex;
  min-width: 0;
  flex-direction: column;
}

.half-containers {
  flex: 0 1 50%;
  overflow: auto;
  box-sizing: border-box;
  border: 0.5px solid red;
  display: flex;
}

.page-header {
  flex: 0 0 auto;
  background-color: #dcdcdc;
}

.page-footer {
  flex: 0 0 auto;
  background-color: #dcdcdc;
}

.swiper-container {
  width: 100%;
  height: 100%;
}

.swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #fff;
  /* Center slide text vertically */
  display: -webkit-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  -webkit-align-items: center;
  align-items: center;
}

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" rel="stylesheet" />

<link href="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.4.6/css/swiper.css" rel="stylesheet" />
<div class="page">
  <div class="main-container">
    <div class="page-header">
      This is a header
    </div>
    <div class="half-containers">
      <!-- Swiper -->
      <div class="swiper-container">
        <div class="swiper-wrapper">
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">1</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">2</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="half-containers">
      <!-- Swiper -->
      <div class="swiper-container">
        <div class="swiper-wrapper">
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">3</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">4</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="page-footer">
      This is a footer
    </div>
  </div>
</div>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.4.6/js/swiper.js"></script>

Answer 1

首先，当施加到object-fit和不将图像1使用div的是无用的。因为图像是没有得到扭曲即使在这种情况下，图像内使用它是没有用的。当比例，以便再次将其带回丢失object-fit才适用。

所以，你将有同样的问题，而不：

var swiper = new Swiper('.swiper-container', {
  slidesPerView: 1,
  spaceBetween: 50,
  // init: false,
  pagination: {
    el: '.swiper-pagination',
    clickable: true,
  },
});

img {
  height: 100%;
  max-width: 100%;
}

.img-num {
  float: left;
  position: absolute;
  padding-left: 10px;
  text-shadow: 1px 1px 2px black, 0 0 1em blue, 0 0 0.2em blue;
  color: white;
  font: 1.5em Georgia, serif;
}


.img-wrapper {
  border-style: solid;
  border-width: thin;
  height: 100%;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  background: #eee;
  font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
  font-size: 14px;
  color: #000;
  margin: 0;
  padding: 0;
}

.page {
  height: 100%;
  display: flex;
}

.main-container {
  flex: 1 1 0;
  display: flex;
  min-width: 0;
  flex-direction: column;
}

.half-containers {
  flex: 0 1 50%;
  overflow: auto;
  box-sizing: border-box;
  border: 0.5px solid red;
  display: flex;
}

.page-header {
  flex: 0 0 auto;
  background-color: #dcdcdc;
}

.page-footer {
  flex: 0 0 auto;
  background-color: #dcdcdc;
}

.swiper-container {
  width: 100%;
  height: 100%;
}

.swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #fff;
  /* Center slide text vertically */
  display: flex;
  justify-content: center;
  align-items: center;
}

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" rel="stylesheet" />

<link href="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.4.6/css/swiper.css" rel="stylesheet" />
<div class="page">
  <div class="main-container">
    <div class="page-header">
      This is a header
    </div>
    <div class="half-containers">
      <!-- Swiper -->
      <div class="swiper-container">
        <div class="swiper-wrapper">
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">1</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">2</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="half-containers">
      <!-- Swiper -->
      <div class="swiper-container">
        <div class="swiper-wrapper">
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">3</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">4</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="page-footer">
      This is a footer
    </div>
  </div>
</div>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.4.6/js/swiper.js"></script>

现在你面临的问题是，像包装是第一按尺寸考虑有图像宽度图像随后将被越来越调整该包装内。这在某种程度上复杂的，但如果从图像中删除height:100%你都会有这样的：

var swiper = new Swiper('.swiper-container', {
  slidesPerView: 1,
  spaceBetween: 50,
  // init: false,
  pagination: {
    el: '.swiper-pagination',
    clickable: true,
  },
});

img {
  /*height: 100%;*/
  max-width: 100%;
}

.img-num {
  float: left;
  position: absolute;
  padding-left: 10px;
  text-shadow: 1px 1px 2px black, 0 0 1em blue, 0 0 0.2em blue;
  color: white;
  font: 1.5em Georgia, serif;
}


.img-wrapper {
  border-style: solid;
  border-width: thin;
  height: 100%;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  background: #eee;
  font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
  font-size: 14px;
  color: #000;
  margin: 0;
  padding: 0;
}

.page {
  height: 100%;
  display: flex;
}

.main-container {
  flex: 1 1 0;
  display: flex;
  min-width: 0;
  flex-direction: column;
}

.half-containers {
  flex: 0 1 50%;
  overflow: auto;
  box-sizing: border-box;
  border: 0.5px solid red;
  display: flex;
}

.page-header {
  flex: 0 0 auto;
  background-color: #dcdcdc;
}

.page-footer {
  flex: 0 0 auto;
  background-color: #dcdcdc;
}

.swiper-container {
  width: 100%;
  height: 100%;
}

.swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #fff;
  /* Center slide text vertically */
  display: flex;
  justify-content: center;
  align-items: center;
}

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" rel="stylesheet" />

<link href="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.4.6/css/swiper.css" rel="stylesheet" />
<div class="page">
  <div class="main-container">
    <div class="page-header">
      This is a header
    </div>
    <div class="half-containers">
      <!-- Swiper -->
      <div class="swiper-container">
        <div class="swiper-wrapper">
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">1</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">2</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="half-containers">
      <!-- Swiper -->
      <div class="swiper-container">
        <div class="swiper-wrapper">
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">3</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">4</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="page-footer">
      This is a footer
    </div>
  </div>
</div>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.4.6/js/swiper.js"></script>

其实，这是你要考虑的宽度什么，但高度是如此大的图像满溢。通过添加height:100%你会降低高度，也是宽度，因为the image will try to keep its ratio。当然，包装将不会再调整，因为将有一个周期因此将停留在该大小。

一个简单的办法是简单地使图像包装position: absolute;。它的高度已经被定义为100%并且其宽度将收缩以适应图像宽度。无需调整top / left，因为它无需使用absolute的因此将保持中心已集中：

var swiper = new Swiper('.swiper-container', {
  slidesPerView: 1,
  spaceBetween: 50,
  // init: false,
  pagination: {
    el: '.swiper-pagination',
    clickable: true,
  },
});

img {
  height: 100%;
  max-width: 100%;
}

.img-num {
  top:0;
  left:0;
  position: absolute;
  padding-left: 10px;
  text-shadow: 1px 1px 2px black, 0 0 1em blue, 0 0 0.2em blue;
  color: white;
  font: 1.5em Georgia, serif;
}


.img-wrapper {
  border-style: solid;
  border-width: thin;
  height: 100%;
  position: absolute;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  background: #eee;
  font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
  font-size: 14px;
  color: #000;
  margin: 0;
  padding: 0;
}

.page {
  height: 100%;
  display: flex;
}

.main-container {
  flex: 1 1 0;
  display: flex;
  min-width: 0;
  flex-direction: column;
}

.half-containers {
  flex: 0 1 50%;
  overflow: auto;
  box-sizing: border-box;
  border: 0.5px solid red;
  display: flex;
}

.page-header {
  flex: 0 0 auto;
  background-color: #dcdcdc;
}

.page-footer {
  flex: 0 0 auto;
  background-color: #dcdcdc;
}

.swiper-container {
  width: 100%;
  height: 100%;
}

.swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #fff;
  /* Center slide text vertically */
  display: flex;
  justify-content: center;
  align-items: center;
}

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" rel="stylesheet" />

<link href="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.4.6/css/swiper.css" rel="stylesheet" />
<div class="page">
  <div class="main-container">
    <div class="page-header">
      This is a header
    </div>
    <div class="half-containers">
      <!-- Swiper -->
      <div class="swiper-container">
        <div class="swiper-wrapper">
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">1</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">2</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="half-containers">
      <!-- Swiper -->
      <div class="swiper-container">
        <div class="swiper-wrapper">
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">3</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">4</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="page-footer">
      This is a footer
    </div>
  </div>
</div>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.4.6/js/swiper.js"></script>

---

1The对象配合属性指定如何替换元素的内容应该被装配到由它的使用高度和width.ref建立的框

一个DIV是不是一个替换元件。替换元素是像canvas，img，iframe等元件（https://html.spec.whatwg.org/multipage/rendering.html#replaced-elements）

UPDATE

以上似乎只在Chrome工作，所以我会考虑一个小JS砍整顿对其他浏览器元素的宽度：

var swiper = new Swiper('.swiper-container', {
  slidesPerView: 1,
  spaceBetween: 50,
  // init: false,
  pagination: {
    el: '.swiper-pagination',
    clickable: true,
  },
});
$('.img-wrapper').each(function() {
  $(this).width($(this).find('img').width())
})
$( window ).resize(function() {
  $('.img-wrapper').each(function() {
    $(this).css('width','100%').width($(this).find('img').width())
  })
});

img {
  height: 100%;
  max-width: 100%;
  object-fit:cover;
}

.img-num {
  top:0;
  left:0;
  position: absolute;
  padding-left: 10px;
  text-shadow: 1px 1px 2px black, 0 0 1em blue, 0 0 0.2em blue;
  color: white;
  font: 1.5em Georgia, serif;
}


.img-wrapper {
  border-style: solid;
  border-width: thin;
  height: 100%;
  position: absolute;
  max-width:100%;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  background: #eee;
  font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
  font-size: 14px;
  color: #000;
  margin: 0;
  padding: 0;
}

.page {
  height: 100%;
  display: flex;
}

.main-container {
  flex: 1 1 0;
  display: flex;
  min-width: 0;
  flex-direction: column;
}

.half-containers {
  flex: 0 1 50%;
  overflow: auto;
  box-sizing: border-box;
  border: 0.5px solid red;
  display: flex;
}

.page-header {
  flex: 0 0 auto;
  background-color: #dcdcdc;
}

.page-footer {
  flex: 0 0 auto;
  background-color: #dcdcdc;
}

.swiper-container {
  width: 100%;
  height: 100%;
}

.swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #fff;
  /* Center slide text vertically */
  display: flex;
  justify-content: center;
  align-items: center;
}

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" rel="stylesheet" />

<link href="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.4.6/css/swiper.css" rel="stylesheet" />
<div class="page">
  <div class="main-container">
    <div class="page-header">
      This is a header
    </div>
    <div class="half-containers">
      <!-- Swiper -->
      <div class="swiper-container">
        <div class="swiper-wrapper">
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">1</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">2</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="half-containers">
      <!-- Swiper -->
      <div class="swiper-container">
        <div class="swiper-wrapper">
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">3</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
          <div class="swiper-slide">
            <div class="img-wrapper">
              <div class="img-num">4</div>
              <img src='https://i.imgur.com/mSPw98T.jpg' />
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="page-footer">
      This is a footer
    </div>
  </div>
</div>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.4.6/js/swiper.js"></script>