html - 为什么我的图像不会扩展到 div 的完整大小？

Question

我目前正在尝试让我的网站响应。我网站的布局方式是，在桌面版本上，它是 2 个 col-6，并排排列，我网站部分(单页网站)的每一页都占据 100% 的宽度和高度，也就是1 页。为了缩放图像，每个 col-6 都有 100% 的高度，同样我的 background-size 设置为 100% 大小。这非常适合桌面版本。

问题是，当我缩小到平板电脑或手机时，每半页使用 col-12，我将它们堆叠在一起，而不是并排放置，100% 大小的图像 div 是在平板电脑上太大了，挤压了另一个 div(因为部分高度只有 100%)。在手机上它太小了，所以它在图像下面显示了一堆空白。

我觉得让它正确缩放的唯一方法是在容器上不设置高度，在 div 中使用 img 标签而不是背景图像，因为它只会占用与它一样多的空间需要，而不是任何额外的。然而，问题是现在它并没有填满它所在的整个图像 div，而是在侧面和底部留下空白空间。我试过设置不同的大小、设置等，但无论我做什么都不会填满它。它在平板电脑和手机上也做同样的事情。我怎样才能让它发挥作用？

它在桌面上应该是什么样子(这是带有背景图像)- http://i988.photobucket.com/albums/af6/jtbitt/24-inch-desktop-responsive_zps6mwocx8l.png

它在桌面上的样子(带有 img)- http://i988.photobucket.com/albums/af6/jtbitt/desktop%20version%20with%20img_zpsirzeqjy7.png

平板电脑(带背景图片)- http://i988.photobucket.com/albums/af6/jtbitt/tablet-stacking-improperly_zpsrxkz3ky3.png

平板电脑 (img) - http://i988.photobucket.com/albums/af6/jtbitt/tablet%20version%20with%20img_zps2lgo5d4x.png

手机(带背景图片)- http://i988.photobucket.com/albums/af6/jtbitt/mobile-stacking-improperly_zps604fz2oy.png

手机 (img) - http://i988.photobucket.com/albums/af6/jtbitt/mobile%20version%20with%20img_zpsqmqrw2ib.png

HTML -

<section id="about" ng-controller="aboutController">    
  <div class="container-fluid">

    <div class="row about-row">

      <div class="about-left col-xs-12 col-md-6">
        <img src="assets/images/jay-ocean.jpg" class="col-xs-12"/>
      </div>

      <div class="about-right col-xs-12 col-md-6">
        <div class="about-content">
          <div class="about-content-title">
            <h1><strong>I'M JAY.</strong></h1>
          </div>

          <div class="about-content-info">
            <p ng-if="about.firstParagraph">An entrepenurial minded, Full Stack Developer. Whenever I'm up against a challenge that I care about, it gives me a rush. Focusing on the big picture is important to me, but I never forget the smaller details. Anything that is not challenging is boring, and makes me yawn. Anything that is seemingly impossible interests me a lot. I'm ready to get to work.</p>

            <p ng-if="!about.firstParagraph">Currently seeking a Javascript position, using the MEAN stack, in New York City. Being innovative, ambitious, and hard working are values that are very important to me. I want to join a company that has similar values and has goals of reaching ridiculous levels of success, not just modest realistic ones. I love working with a solid team.</p>
          </div>

          <div class="about-button">
            <button ng-if="about.firstParagraph" class="label label-success" ng-click="about.switchParagraph()">MORE =></button>
            <button ng-if="!about.firstParagraph" class="label label-success"><a href="/portfolio">VIEW SKILLS</a></button>
          </div>

          <div class="about-personal-info">
            <h4>Email: jaybittner@gmail.com</h4>
          </div>

          <div class="about-icon">
            <a href="{{ profile.url }}" ng-repeat="profile in about.profiles"><img ng-src="{{ profile.icon }}" /></a>
          </div>
        </div>

      </div>

    </div>

  </div>
</section>

CSS -

#about {
  height: 100%; 
  width: 100%;
  background: rgba(0,97,65,1);
  background: -moz-linear-gradient(left, rgba(0,97,65,1) 0%, rgba(54,135,95,1) 7%, rgba(36,123,85,1) 22%, rgba(0,97,65,1) 53%, rgba(34,121,84,1) 76%, rgba(54,135,95,1) 90%, rgba(54,135,95,1) 100%);
  background: -webkit-gradient(left top, right top, color-stop(0%, rgba(0,97,65,1)), color-stop(7%, rgba(54,135,95,1)), color-stop(22%, rgba(36,123,85,1)), color-stop(53%, rgba(0,97,65,1)), color-stop(76%, rgba(34,121,84,1)), color-stop(90%, rgba(54,135,95,1)), color-stop(100%, rgba(54,135,95,1)));
  background: -webkit-linear-gradient(left, rgba(0,97,65,1) 0%, rgba(54,135,95,1) 7%, rgba(36,123,85,1) 22%, rgba(0,97,65,1) 53%, rgba(34,121,84,1) 76%, rgba(54,135,95,1) 90%, rgba(54,135,95,1) 100%);
  background: -o-linear-gradient(left, rgba(0,97,65,1) 0%, rgba(54,135,95,1) 7%, rgba(36,123,85,1) 22%, rgba(0,97,65,1) 53%, rgba(34,121,84,1) 76%, rgba(54,135,95,1) 90%, rgba(54,135,95,1) 100%);
  background: -ms-linear-gradient(left, rgba(0,97,65,1) 0%, rgba(54,135,95,1) 7%, rgba(36,123,85,1) 22%, rgba(0,97,65,1) 53%, rgba(34,121,84,1) 76%, rgba(54,135,95,1) 90%, rgba(54,135,95,1) 100%);
  background: linear-gradient(to right, rgba(0,97,65,1) 0%, rgba(54,135,95,1) 7%, rgba(36,123,85,1) 22%, rgba(0,97,65,1) 53%, rgba(34,121,84,1) 76%, rgba(54,135,95,1) 90%, rgba(54,135,95,1) 100%);
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#006141', endColorstr='#36875f', GradientType=1 );
  background-repeat: no-repeat;
  color: #101010;
}

/*#about .container-fluid, #about .row {
  height: 100%;
}*/

/*.about-left {
  height: 100%;
  background-image: url('../../images/jay-ocean.jpg'); 
  background-repeat: no-repeat;
  background-size: 110%;
  border-right: 3px solid #101010;
  border-bottom: 3px solid black;
}*/

/*.about-left img {
  height: 100%;
  width: 100%;
  object-fit: fill;
}*/

.about-right {
  padding-top: 24vh;
  padding-left: 3.4vw;
  text-align: center;
}

.about-content {
  width: 50%;
  margin-left: auto;
  margin-right: auto;
}

.about-content-title {
  padding-bottom: -30px;
}

.about-content-title h1{
  font-size: 3.1vw;
  margin: 3px;
}

.about-content-info p {
  font-size: 1vw;
  word-spacing: 0.3vw;
}

.about-button button {
  color: gray;
  border: 1px solid #101010;
  background-color: #101010;
  font-size: 0.7vw;
}

.about-button a {
  color: gray;
}

.about-personal-info h4 {
  font-size: 1vw;
  word-spacing: 0.3vw;
}

.about-icon img {
  height: 3.5vh;
  width: 1.75vw;
  border-radius: 10px;
  border: 1px solid #101010;
  margin: 3px;
}

Answer 1

为什么不用 cover 值设置 background-size 属性？