Question

我正在使用Bootstrap 3.3.7。

我无法理解为什么我的图片在> 630px和< 768px的视口范围之间不能显示全角。图片的宽度为400px，非常适合> 768px。

如果我将宽度设为800像素，则可以使图片适合< 768px。但是随后，图片在>768px上变得越来越大。

是否可以保持现在的宽度，但使图片变为全角<768px？

演示版本可以为seen here

  /* Card and Button */

    body {
        background-color: #f5f5f5;
    }
    div { 
        background-color: #fff;
    }
    .index-content a:hover {
      color: black;
      text-decoration: none;
    }

    .index-content {
      /*margin-bottom: 20px;*/
      /*padding: 50px 0px;*/
    }

    .index-content .row {
      margin-top: 20px;
    }

    .index-content a {
      color: black;
    }

    .index-content .card {
      background-color: #FFFFFF;
      padding: 0;
      -webkit-border-radius: 4px;
      -moz-border-radius: 4px;
      border-radius: 4px;
      box-shadow: 0 4px 5px 0 rgba(0, 0, 0, 0.14), 0 1px 10px 0 rgba(0, 0, 0, 0.12), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    }

    .index-content .card:hover {
      box-shadow: 0 16px 24px 2px rgba(0, 0, 0, 0.14), 0 6px 30px 5px rgba(0, 0, 0, 0.12), 0 8px 10px -5px rgba(0, 0, 0, 0.3);
      color: black;
    }

    .index-content .card img {
      width: 100%;
      border-top-left-radius: 4px;
      border-top-right-radius: 4px;
      height: 350px;
    }

    .index-content .card h4 {
      margin: 20px;
    }

    .index-content .card p {
      margin: 20px;
      opacity: 0.65;
    }

    .index-content .blue-button {
      width: 100px;
      -webkit-transition: background-color 1s, color 1s;
      /* For Safari 3.1 to 6.0 */
      transition: background-color 0.5s, color 0.5s;
      min-height: 20px;
      background-color: #002E5B;
      color: #ffffff;
      border-radius: 4px;
      text-align: center;
      font-weight: lighter;
      margin: 0px 20px 15px 20px;
      padding: 5px 0px;
      display: inline-block;
    }

    .index-content .blue-button:hover {
      background-color: #dadada;
      color: #002E5B;
    }

    /* GRID ELEMENTS MEDIA QUERIES */

    
    @media (min-width: 768px) {
        .card {
            position: relative;
        }
        .card-content {
            position: absolute;
            bottom: 0;
            width: 100%;
            background: rgba(0, 0, 0, 0.5);
        }
        .card-content h4,
        .card-content p {
            color: white;
            width: 100%;
            float: left;
            margin: 0 0 5px;
        }
        .card-content a {
            float: right;
        }
        .index-content .card h4,
        .index-content .card p {
            padding: 15px 20px;
            margin: 0;
        }
        .index-content .card p {
            padding: 0 20px 15px;
            margin: 0;
        }
    }

    .margin_bottom{
        margin-bottom:10px;
    }
    .row [class*="col-"]{ 
        padding-right: 5px;
        padding-left: 5px; 
    }
    .row { 
        margin-left: -5px; 
        margin-right: -5px; 
    }
    
    .card-img-bottom {
  color: #fff;
  height: 20rem;
  background: url(images/img1.jpg) center no-repeat;
  background-size: cover;
}

<div class="container">
  <div class="row">
    <div class="col-sm-4 margin_bottom">
        <img src="http://placehold.it/400x510" alt="5" class="img-responsive"></img>
    </div>
    <div class="col-sm-4">
        <div class="row">
            <div class="col-xs-6 col-sm-12 margin_bottom">
                <img src="http://placehold.it/400x245" alt="5" class="img-responsive"></img>
            </div>
            <div class="col-xs-6 col-sm-12 margin_bottom">
                <img src="http://placehold.it/400x250" alt="5" class="img-responsive"></img>
            </div>
        </div>
    </div>
    <div class="col-sm-4 margin_bottom">
        <img src="http://placehold.it/400x510" alt="5" class="img-responsive"></img>
    </div>
  </div>
</div>

Answer 1

添加此CSS

@media (max-width: 768px) {
  img {
      width: 100%;
    }
}

/* Card and Button */

body {
  background-color: #f5f5f5;
}

div {
  background-color: #fff;
}

.index-content a:hover {
  color: black;
  text-decoration: none;
}

.index-content {
  /*margin-bottom: 20px;*/
  /*padding: 50px 0px;*/
}

.index-content .row {
  margin-top: 20px;
}

.index-content a {
  color: black;
}

.index-content .card {
  background-color: #FFFFFF;
  padding: 0;
  -webkit-border-radius: 4px;
  -moz-border-radius: 4px;
  border-radius: 4px;
  box-shadow: 0 4px 5px 0 rgba(0, 0, 0, 0.14), 0 1px 10px 0 rgba(0, 0, 0, 0.12), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
}

.index-content .card:hover {
  box-shadow: 0 16px 24px 2px rgba(0, 0, 0, 0.14), 0 6px 30px 5px rgba(0, 0, 0, 0.12), 0 8px 10px -5px rgba(0, 0, 0, 0.3);
  color: black;
}

.index-content .card img {
  width: 100%;
  border-top-left-radius: 4px;
  border-top-right-radius: 4px;
  height: 350px;
}

.index-content .card h4 {
  margin: 20px;
}

.index-content .card p {
  margin: 20px;
  opacity: 0.65;
}

.index-content .blue-button {
  width: 100px;
  -webkit-transition: background-color 1s, color 1s;
  /* For Safari 3.1 to 6.0 */
  transition: background-color 0.5s, color 0.5s;
  min-height: 20px;
  background-color: #002E5B;
  color: #ffffff;
  border-radius: 4px;
  text-align: center;
  font-weight: lighter;
  margin: 0px 20px 15px 20px;
  padding: 5px 0px;
  display: inline-block;
}

.index-content .blue-button:hover {
  background-color: #dadada;
  color: #002E5B;
}


/* GRID ELEMENTS MEDIA QUERIES */

@media (min-width: 768px) {
  .card {
    position: relative;
  }
  .card-content {
    position: absolute;
    bottom: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.5);
  }
  .card-content h4,
  .card-content p {
    color: white;
    width: 100%;
    float: left;
    margin: 0 0 5px;
  }
  .card-content a {
    float: right;
  }
  .index-content .card h4,
  .index-content .card p {
    padding: 15px 20px;
    margin: 0;
  }
  .index-content .card p {
    padding: 0 20px 15px;
    margin: 0;
  }
}

@media (max-width: 768px) {
  img {
    width: 100%;
  }
}

.margin_bottom {
  margin-bottom: 10px;
}

.row [class*="col-"] {
  padding-right: 5px;
  padding-left: 5px;
}

.row {
  margin-left: -5px;
  margin-right: -5px;
}

.card-img-bottom {
  color: #fff;
  height: 20rem;
  background: url(images/img1.jpg) center no-repeat;
  background-size: cover;
}

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<div class="container">
  <div class="row">
    <div class="col-sm-4 margin_bottom">
      <img src="http://placehold.it/400x510" alt="5" class="img-responsive" />
    </div>
    <div class="col-sm-4">
      <div class="row">
        <div class="col-xs-6 col-sm-12 margin_bottom">
          <img src="http://placehold.it/400x245" alt="5" class="img-responsive" />
        </div>
        <div class="col-xs-6 col-sm-12 margin_bottom">
          <img src="http://placehold.it/400x250" alt="5" class="img-responsive" />
        </div>
      </div>
    </div>
    <div class="col-sm-4 margin_bottom">
      <img src="http://placehold.it/400x510" alt="5" class="img-responsive"></img>
    </div>
  </div>
</div>

Answer 2

<div class="container"> <div class="row"> <div class="col-sm-4 margin_bottom"> <img src="http://placehold.it/400x510" alt="5" class="img-responsive"></img> </div> <div class="col-sm-4"> <div class="row"> <div class="col-xs-6 col-md-12 col-sm-12 margin_bottom"> <img src="http://placehold.it/400x245" alt="5" class="img-responsive"></img> </div> <div class="col-xs-6 col-md-12 col-sm-12 margin_bottom"> <img src="http://placehold.it/400x250" alt="5" class="img-responsive"></img> </div> </div> </div> <div class="col-sm-4 margin_bottom"> <img src="http://placehold.it/400x510" alt="5" class="img-responsive"></img> </div> </div> </div>

用这个替换您的html，您只需要将col-md-12添加到您的代码中。或者，您可以使用媒体查询来实现。在这里，您去了：

@media (max-width:767px){.col-sm-12 img{width:100%;}}

Answer 3

由于您使用的是最小宽度：768像素的媒体查询，因此您只需添加此CSS规则即可使其在768像素以下运行：

.img-responsive {width:100%;}

如果您不希望覆盖bootstrap的默认类，则可以提出自己的类并将其应用于每个图像。

使列的全角宽度小于768px

3 个答案: