黑色不透明覆盖层使图像尺寸增大

Becky 发表于 Dev

贝基

我有一个小问题确实困扰着我。每当我的图像悬停在上方时，黑色覆盖层就会出现不透明的情况。但是，它会使图像变高。请注意，我指的不是transform，scale属性。实际图像的高度在图像底部增加。

是什么原因造成的？

$('.home-img-block').find('img').each(function() {
  var imgClass = (this.width / this.height > 1) ? 'wide' : 'tall';
  console.log(imgClass);
  $(this).addClass(imgClass);
});

#home-img-block-section {
  width: 100%;
  height: 900px;
}
#home-img-blocks {
  width: 100%;
  height: 450px;
}
.home-img-block {
  width: 33.33%;
  /*height: 100%;*/
  float: left;
  display: inline-block;
  overflow: hidden;
  cursor: pointer;
  position: relative;
}
.home-img-block:hover .overlay {
  background: rgba(0, 0, 0, 0.6);
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}
.home-img-block:after {
  content: attr(data-content);
  color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  border: 1px solid #fff;
  padding: 20px 25px;
  text-align: center;
}
.home-img-block:hover:after {
  opacity: 1;
}
.home-img-block img {
  -webkit-transition: all 1s ease;
  /* Safari and Chrome */
  -moz-transition: all 1s ease;
  /* Firefox */
  -ms-transition: all 1s ease;
  /* IE 9 */
  -o-transition: all 1s ease;
  /* Opera */
  transition: all 1s ease;
}
.home-img-block:hover img {
  -webkit-transform: scale(1.25);
  /* Safari and Chrome */
  -moz-transform: scale(1.25);
  /* Firefox */
  -ms-transform: scale(1.25);
  /* IE 9 */
  -o-transform: scale(1.25);
  /* Opera */
  transform: scale(1.25);
  background: rgba(0, 0, 0, 0.3);
  width: 33.33%;
  max-height: 100%;
}
.home-img-block img.wide {
  max-width: 100%;
  max-height: 100%;
  height: auto;
  width: 100%;
}
.home-img-block img.tall {
  max-width: 100%;
  max-height: 100%;
  width: auto;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="home-img-blocks">
  <div data-content="FIND OUT MORE" class="home-img-block">
    <img src="http://optimumwebdesigns.com/images/test1.jpg">
    <div class="overlay"></div>
  </div>
  <div data-content="FIND OUT MORE" class="home-img-block">
    <img src="http://optimumwebdesigns.com/images/test2new.jpg">
    <div class="overlay"></div>
  </div>
  <div data-content="FIND OUT MORE" class="home-img-block">
    <img src="http://optimumwebdesigns.com/images/test3new.jpg">
    <div class="overlay"></div>
  </div>
</div>

Praveen Kumar Purushothaman

图像太疯狂了display。他们既不的block，inline-block或inline。display: block由于其baseline属性，请尝试给予图像。

$('.home-img-block').find('img').each(function() {
  var imgClass = (this.width / this.height > 1) ? 'wide' : 'tall';
  console.log(imgClass);
  $(this).addClass(imgClass);
});

img {
  display: block;
}
#home-img-block-section {
  width: 100%;
  height: 900px;
}
#home-img-blocks {
  width: 100%;
  height: 450px;
}
.home-img-block {
  width: 33.33%;
  /*height: 100%;*/
  float: left;
  display: inline-block;
  overflow: hidden;
  cursor: pointer;
  position: relative;
}
.home-img-block:hover .overlay {
  background: rgba(0, 0, 0, 0.6);
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}
.home-img-block:after {
  content: attr(data-content);
  color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  border: 1px solid #fff;
  padding: 20px 25px;
  text-align: center;
}
.home-img-block:hover:after {
  opacity: 1;
}
.home-img-block img {
  -webkit-transition: all 1s ease;
  /* Safari and Chrome */
  -moz-transition: all 1s ease;
  /* Firefox */
  -ms-transition: all 1s ease;
  /* IE 9 */
  -o-transition: all 1s ease;
  /* Opera */
  transition: all 1s ease;
}
.home-img-block:hover img {
  -webkit-transform: scale(1.25);
  /* Safari and Chrome */
  -moz-transform: scale(1.25);
  /* Firefox */
  -ms-transform: scale(1.25);
  /* IE 9 */
  -o-transform: scale(1.25);
  /* Opera */
  transform: scale(1.25);
  background: rgba(0, 0, 0, 0.3);
  width: 33.33%;
  max-height: 100%;
}
.home-img-block img.wide {
  max-width: 100%;
  max-height: 100%;
  height: auto;
  width: 100%;
}
.home-img-block img.tall {
  max-width: 100%;
  max-height: 100%;
  width: auto;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="home-img-blocks">
  <div data-content="FIND OUT MORE" class="home-img-block">
    <img src="http://optimumwebdesigns.com/images/test1.jpg">
    <div class="overlay"></div>
  </div>
  <div data-content="FIND OUT MORE" class="home-img-block">
    <img src="http://optimumwebdesigns.com/images/test2new.jpg">
    <div class="overlay"></div>
  </div>
  <div data-content="FIND OUT MORE" class="home-img-block">
    <img src="http://optimumwebdesigns.com/images/test3new.jpg">
    <div class="overlay"></div>
  </div>
</div>