当我使用称为卡的Bootstrap 4组件时，如何创建我的图像缩放。我在http://www.themezaa.com/html/leadgen/demo/seo-marketing/index.html得到了灵感。我在下面使用了以下代码。
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
<div class="container">
<div class="row">
<div class="col-lg-3">
<div class="card" >
<img class="card-img-top" src="http://www.successmoves.co.uk/wp-content/uploads/2012/07/50708_1280x720-318x180.jpg" alt="Card image cap">
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
</div>
<div class="col-lg-3">
<div class="card" >
<img class="card-img-top" src="http://mapleleafadventures.com/wp-content/uploads/2015/11/mv-swell-jeffreynolds-318x180.jpg" alt="Card image cap">
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
</div>
<div class="col-lg-3">
<div class="card" >
<img class="card-img-top" src="http://www.smart-magazine.com/content/uploads/2016/09/Zaraeeb-el-seed-318x180.jpg" alt="Card image cap">
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
</div>
<div class="col-lg-3">
<div class="card" >
<img class="card-img-top" src="http://www.professionalyachtingservices.com/wp-content/uploads/2016/06/IMG_0271rr-318x180.jpg" alt="Card image cap">
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
</div>
</div>
</div>
答案 0 :(得分：3)
您可以将它们包装在新元素中，在该元素上设置overflow: hidden，并将鼠标悬停在父元素上时在图像上使用scale()。我还应用了一个半透明的叠加层，就像你引用的网站一样。
.card-img-wrap {
overflow: hidden;
position: relative;
}
.card-img-wrap:after {
content: '';
position: absolute;
top: 0; left: 0; right: 0; bottom: 0;
background: rgba(255,255,255,0.3);
opacity: 0;
transition: opacity .25s;
}
.card-img-wrap img {
transition: transform .25s;
width: 100%;
}
.card-img-wrap:hover img {
transform: scale(1.2);
}
.card-img-wrap:hover:after {
opacity: 1;
}<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
<div class="container">
<div class="row">
<div class="col-lg-3">
<div class="card" >
<div class="card-img-wrap"><img class="card-img-top" src="http://www.successmoves.co.uk/wp-content/uploads/2012/07/50708_1280x720-318x180.jpg" alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
</div>
<div class="col-lg-3">
<div class="card" >
<div class="card-img-wrap"><img class="card-img-top" src="http://mapleleafadventures.com/wp-content/uploads/2015/11/mv-swell-jeffreynolds-318x180.jpg" alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
</div>
<div class="col-lg-3">
<div class="card" >
<div class="card-img-wrap"><img class="card-img-top" src="http://www.smart-magazine.com/content/uploads/2016/09/Zaraeeb-el-seed-318x180.jpg" alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
</div>
<div class="col-lg-3">
<div class="card" >
<div class="card-img-wrap"><img class="card-img-top" src="http://www.professionalyachtingservices.com/wp-content/uploads/2016/06/IMG_0271rr-318x180.jpg" alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
</div>
</div>
</div>