javascript - 幻灯片容器相同高度

Question

我有一张图片幻灯片，其中包含四张不同高度的图片。我试图让它们都保持 700 像素的相同高度，但我不知道该怎么做。我将 img 设置为 max-height: 700px，但这似乎不起作用。

这是 codepen .

   

 var slideIndex = 1;

  showSlide(slideIndex);


  function plusSlides(n) {
      showSlide(slideIndex += n);
  }

  function currentSlide(n) {
      showSlide(slideIndex = n);
  }


  function showSlide(n) {

      var i;

      var slides = document.getElementsByClassName("myslides");

      var dots = document.getElementsByClassName("dots");

      if (n > slides.length) {
          slideIndex = 1
      };

      if (n < 1) {
          slideIndex = slides.length
      };

      for (i = 0; i < slides.length; i++) {

          slides[i].style.display = "none";

      };

      for (i = 0; i < dots.length; i++) {

          dots[i].className = dots[i].className.replace(" active", "");

      };

      slides[slideIndex - 1].style.display = "block";

      dots[slideIndex - 1].className += " active";

  }

body{
  font-family: verdana,sans-serif;
  margin: 0;
  font-size: 100%;
}

#slideshow-container{
  position: relative;
  margin: auto;
  background-color: black;
  overflow: hidden;
}

#slideshow-container img{
  display: block;
  margin: 0 auto;
  max-width: 100%;
  position: relative;
  max-height: 700px !important;
}

.myslides{
  display: none;
}

.prev , .next{
  position: absolute;
  top: 50%;
  font-size: 30px;
  font-weight: bold;
  padding: 16px;
  margin-top: -22px;
  border-radius: 0 3px 3px 0;
  color: #fff;
  cursor: pointer;
  z-index: 1;
}

.next{
  right: 0;
  border-radius: 3px 0 0 3px;
}

.prev:hover,.next:hover{
  background-color: rgba(0,0,0,0.8);
}

.caption{
  text-align: center;
  position: absolute;
  bottom: 5px;
  width: 100%;
  color: #f2f2f2;
  font-size: 1em;
/*   font-size: 15px; */
/*   padding: 8px 22px; */
}

.fade{
  animation-name:fade;
  animation-duration:1.5s;
}

@keyframes fade{
  from {opacity: 0.4;}
  to {opacity: 1;}
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!---Images not owned by me --->

<div id="slideshow-container">
 <div id="mainImg">

  <div class="myslides fade">
    <div><img src="https://static.boredpanda.com/blog/wp-content/uploads/2014/12/Top-10-photographers-for-travel-portraits27__700.jpg"></div>
      <div class="caption">Text 1</div>
  </div>

  <div class="myslides fade">
    <div><img src="https://cdn-images-1.medium.com/max/1600/1*way-yv9effv2b7PKZeUDMA.png"></div>
      <div class="caption">Text 2</div>
  </div>

  <div class="myslides fade">
    <div><img src="https://www.shutterbug.com/images/17/promosa111217.png"></div>
      <div class="caption">Text 3</div>
  </div>

  <div class="myslides fade">
    <div><img src="http://jmacpratt.weebly.com/uploads/1/2/0/1/12013129/portrait2_orig.jpg"></div>
      <div class="caption">Text 4</div>
  </div>

    <a class="prev" onclick="plusSlides(-1)">&#10094;</a>

    <a class="next" onclick="plusSlides(1)">&#10095;</a>

   </div>
</div>

Answer 1

将 max-height: 700px 样式更改为 height: 700px 并将 width: 100%; 更改为 width: auto;

var slideIndex = 1;

showSlide(slideIndex);


function plusSlides(n){

showSlide(slideIndex += n);

}


function currentSlide(n) {

showSlide(slideIndex = n);

}


function showSlide(n){

var i;

var slides = document.getElementsByClassName("myslides");

var dots = document.getElementsByClassName("dots");

if (n > slides.length) { slideIndex = 1};

if (n < 1) { slideIndex = slides.length};

for (i=0;i<slides.length;i++) {

slides[i].style.display = "none";

};

for (i=0;i<dots.length;i++) {

dots[i].className = dots[i].className.replace(" active","");

};

slides[slideIndex-1].style.display = "block";

dots[slideIndex-1].className += " active";

}

body{
  font-family: verdana,sans-serif;
  margin: 0;
  font-size: 100%;
}

#slideshow-container{
  position: relative;
  margin: auto;
  background-color: black;
  overflow: hidden;
}

#slideshow-container img{
  display: block;
  margin: 0 auto;
  width: auto;
  position: relative;
  height: 700px !important;
}

.myslides{
  display: none;
}

.prev , .next{
  position: absolute;
  top: 50%;
  font-size: 30px;
  font-weight: bold;
  padding: 16px;
  margin-top: -22px;
  border-radius: 0 3px 3px 0;
  color: #fff;
  cursor: pointer;
  z-index: 1;
}

.next{
  right: 0;
  border-radius: 3px 0 0 3px;
}

.prev:hover,.next:hover{
  background-color: rgba(0,0,0,0.8);
}

.caption{
  text-align: center;
  position: absolute;
  bottom: 5px;
  width: 100%;
  color: #f2f2f2;
  font-size: 1em;
/*   font-size: 15px; */
/*   padding: 8px 22px; */
}

.fade{
  animation-name:fade;
  animation-duration:1.5s;
}

@keyframes fade{
  from {opacity: 0.4;}
  to {opacity: 1;}
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!---Images not owned by me --->

<div id="slideshow-container">
 <div id="mainImg">

  <div class="myslides fade">
    <div><img src="https://static.boredpanda.com/blog/wp-content/uploads/2014/12/Top-10-photographers-for-travel-portraits27__700.jpg"></div>
      <div class="caption">Text 1</div>
  </div>

  <div class="myslides fade">
    <div><img src="https://cdn-images-1.medium.com/max/1600/1*way-yv9effv2b7PKZeUDMA.png"></div>
      <div class="caption">Text 2</div>
  </div>

  <div class="myslides fade">
    <div><img src="https://www.shutterbug.com/images/17/promosa111217.png"></div>
      <div class="caption">Text 3</div>
  </div>

  <div class="myslides fade">
    <div><img src="http://jmacpratt.weebly.com/uploads/1/2/0/1/12013129/portrait2_orig.jpg"></div>
      <div class="caption">Text 4</div>
  </div>

    <a class="prev" onclick="plusSlides(-1)">&#10094;</a>

    <a class="next" onclick="plusSlides(1)">&#10095;</a>

   </div>
</div>