html css3 slider - 如何计算代码中新创建的关键帧滑块的百分比或运行时间？

Question

我需要一个灯！

一个现实的例子：https://codepen.io/cassidoo/pen/MyaWzp

这是整个代码的一小部分。

HTML

`<h1>Pure CSS3 Text Carousel</h1>`

`<div class="content-slider">
  <div class="slider">
    <div class="mask">
      <ul>
       <li class="anim1">
          <div class="quote">Hello, this is a quote from a person.</div>
          <div class="source">- Person</div>
        </li>
    <li class="anim2">
      <div class="quote">Hello, this is a quote from another person.</div>
      <div class="source">- Another person</div>
    </li>
    <li class="anim3">
      <div class="quote">Hello, this is a quote from an animal.</div>
      <div class="source">- Animal</div>
    </li>
    <li class="anim4">
      <div class="quote">Hello, this is a quote from a plant.</div>
      <div class="source">- Plant</div>
    </li>
    <li class="anim5">
      <div class="quote">How do ya like that.</div>
      <div class="source">- Cassidy</div>
    </li>
  </ul>
</div>

 **CSS**
 .slider li.anim1 {
   -moz-animation: cycle 60s linear infinite;
   -webkit-animation: cycle 60s linear infinite;
   animation: cycle 60s linear infinite;
  }
*/@-moz-keyframes cycle {
 0% {
    top: 0px;
  }
  4% {
    top: 0px;
  }
  16% {
   top: 0px;
    opacity: 1;
    z-index: 0;
  }
   20% {
     top: 325px;
    opacity: 0;
    z-index: 0;
  }
  21% {
    top: -325px;
    opacity: 0;
    z-index: -1;
  }
   92% {
    top: -325px;
    opacity: 0;
    z-index: 0;
  }
   96% {
    top: -325px;
    opacity: 0;
  }
  100% {
     top: 0px;
    opacity: 1;
  }
}
@-webkit-keyframes cycle {
  0% {
    top: 0px;
  }
  4% {
    top: 0px;
  }
  16% {
     top: 0px;
    opacity: 1;
    z-index: 0;
  }
  20% {
    top: 325px;
    opacity: 0;
    z-index: 0;
  }
  21% {
     top: -325px;
     opacity: 0;
    z-index: -1;
  }
  50% {
    top: -325px;
    opacity: 0;
    z-index: -1;
   }
  92% {
    top: -325px;
    opacity: 0;
    z-index: 0;
   }
  96% {
    top: -325px;
    opacity: 0;
  }
  100% {
     top: 0px;
     opacity: 1;
  }
}

我正在尝试根据代码创建超过5个TEXT SLIDES。

但是当我尝试实现第六个第六张幻灯片等时我遇到了问题。

我认为这里的主要问题是@-WEBKIT-KEYFRAMES和@-MOZ-KEYFRAMES CYCLE数学计算。所有幻灯片按顺序一起工作。

如果我复制一个现有幻灯片并尝试创建数字6，这将生成一个duplicated slideshow，它将显示一个重复Frases的序列！

题：

• 是否有任何关键帧循环计算器或数学计算方法，我可以用来做10次或更多幻灯片？
• 有一个工具，我可以用它来帮助我进行计算吗？
• 我该怎么做才能增加幻灯片的数量？
• 我应该在代码中实现什么？

我想重现与上面的示例link相同的效果，但使用10幻灯片或更多。

这就是我需要观察计算方法的原因。

非常感谢您的帮助。

Answer 1

我建议将公共类添加到需要动画的所有元素（.anim1，.anim2 ...，。anim7）中。我添加了常见的类.anim。在.anim类样式上添加动画，并在.anim1, .anim2, ...., .anim7类样式上添加延迟，增加动画总持续时间。

换句话说，在所有元素上运行相同的动画并有一些延迟。

如果要添加/删除动画元素，只需要在animation-duration属性上进行简单的数学运算。这将是animation-delay time * total elements。

请参阅下面的代码段：

html,
body {
  font-family: 'Droid Serif', serif;
}

h1 {
  font-size: 60px;
  text-align: center;
}

.content-slider {
  width: 100%;
  height: 360px;
}

.slider {
  height: 320px;
  width: 680px;
  margin: 40px auto 0;
  overflow: visible;
  position: relative;
}

.mask {
  overflow: hidden;
  height: 320px;
}

.slider ul {
  margin: 0;
  padding: 0;
  position: relative;
}

.slider li {
  width: 680px;
  height: 320px;
  position: absolute;
  top: -325px;
  list-style: none;
}

.slider .quote {
  font-size: 40px;
  font-style: italic;
}

.slider .source {
  font-size: 20px;
  text-align: right;
}

.slider li.anim {
  animation-name: cycle;
  animation-duration: 21s; /*You need to do Math here. (delay time * total elements)*/
  animation-iteration-count: infinite;
  animation-fill-mode: forwards;
  animation-timing-function: linear;
}

.anim1{
  animation-delay:0s; 
}

.anim2{
  animation-delay:3s; 
}
.anim3{
  animation-delay:6s; 
} 
.anim4{
  animation-delay:9s; 
}
.anim5{
  animation-delay:12s; 
} 
.anim6{
  animation-delay:15s; 
}
.anim7{
  animation-delay:18s; 
}

.slider:hover li {
  animation-play-state: paused;
}

@keyframes cycle {
  0% {
    top: -325px;
  }
  4% {
    top: 0px;
  }
  16% {
    top: 0px;
    opacity: 1;
    z-index: 0;
  }
  18% {
    top: 325px;
    opacity: 0;
    z-index: 0;
  }
  92% {
    top: -325px;
    opacity: 0;
    z-index: 0;
  }
  100% {
    top: -325px;
    opacity: 0;
  }
}

<h1>Pure CSS3 Text Carousel</h1>

<div class="content-slider">
  <div class="slider">
    <div class="mask">
      <ul>
        <li class="anim anim1">
          <div class="quote">1. Hello, this is a quote from a person.</div>
          <div class="source">1 - Person</div>
        </li>
        <li class="anim anim2">
          <div class="quote">2. Hello, this is a quote from another person.</div>
          <div class="source">2 - Another person</div>
        </li>
        <li class="anim anim3">
          <div class="quote">3. Hello, this is a quote from an animal.</div>
          <div class="source">3 - Animal</div>
        </li>
        <li class="anim anim4">
          <div class="quote">4. Hello, this is a quote from a plant.</div>
          <div class="source">4 - Plant</div>
        </li>
        <li class="anim anim5">
          <div class="quote">5. How do ya like that.</div>
          <div class="source">5 - Cassidy</div>
        </li>
        <li class="anim anim6">
          <div class="quote">6. How do ya like that.</div>
          <div class="source">6 - Cassidy</div>
        </li>
        <li class="anim anim7">
          <div class="quote">7. How do ya like that.</div>
          <div class="source">7 - Cassidy</div>
        </li>
      </ul>
    </div>
  </div>
</div>