CSS循环动画

Question

我正在尝试学习 HTML 和 CSS，但我遇到了一个问题:

<style style="text/css">
    div.slide-slow {
        width: 100%;
        overflow: hidden;
    }

    div.slide-slow div.inner {
        animation: slide-slow 30s;
        margin-top: 0%;
    }

    @keyframes slide-slow {
        from {
            margin-left: 100%;
        }

        to {
            margin-left: 0%;
        }
    }
</style>

<div class="slide-slow">
    <div class="inner">
        <img src="http://www.html.am/images/html-codes/marquees/fish-swimming.gif" alt="Swimming fish">
    </div>
</div>

我希望此 CSS 循环播放，而不是在完成后停止。是否可以使 CSS 函数循环？

Answer 1

使用animation-iteration-count: infinite .用数值限制循环。

<style style="text/css">
  div.slide-slow {
    width: 100%;
    overflow: hidden;
  }
  div.slide-slow div.inner {
    animation: slide-slow 3s;
    margin-top: 0%;
    animation-iteration-count: infinite;
  }
  @keyframes slide-slow {
    from {
      margin-left: 100%;
    }
    to {
      margin-left: 0%;
    }
  }
</style>

<div class="slide-slow">
  <div class="inner">
    <img src="http://www.html.am/images/html-codes/marquees/fish-swimming.gif" alt="Swimming fish">
  </div>
</div>

---

补充:对于Ismael的建议实现带有翻转效果的前后动画，可以利用rotateY(180deg) .与在静止位置/位置翻转相反，最好将鱼旋转，就像它随着水流向后移动一样(正常动画)。 ease-in-out可以帮助更好地保持计时功能。我为旋转功能使用了 width: 40vw 以稍微响应/视口(viewport)依赖并且不会旋转太多偏移。

调整边距和宽度值以获得合适的动画。

<style style="text/css">
  * {
    margin: 0;
    padding: 0;
  }
  div.slide-slow {
    width: 100%;
    overflow: hidden;
  }
  div.slide-slow div.inner {
    animation: slide-slow 15s;
    margin-top: 0%;
    animation-iteration-count: infinite;
    animation-delay: 0s;
    width: 40vw;
    animation-fill-mode: forwards;
    animation-timing-function: ease-in-out;
  }
  @keyframes slide-slow {
    0% {
      margin-left: 85%;
    }
    25% {
      margin-left: 20%;
      transform: rotateY(0deg);
    }
    50% {
      margin-left: -25%;
      transform: rotateY(180deg);
      transform-origin: center center;
    }
    75% {
      margin-left: 50%;
      transform: rotateY(180deg);
    }
    100% {
      margin-left: 85%;
      transform: rotateY(0deg);
    }
  }
</style>

<div class="slide-slow">
  <div class="inner">
    <img src="http://i.stack.imgur.com/nJAsS.gif" alt="Swimming fish">
  </div>
</div>

(图片来源:http://www.html.am/images/html-codes/marquees/fish-swimming.gif)