Question

我使用CSS创建了一个交叉淡入淡出，但我在时间上遇到了困难。我想在每张图像之间延迟4秒或4秒但它不起作用。

#cf {
  position:absolute;
  margin:0 auto;
    width: 100%;
    height: 100%;
    top: 0;
}

#cf img {
  position:absolute;
  left:0;
  -webkit-transition: opacity 1s ease-in-out;
  -moz-transition: opacity 1s ease-in-out;
  -o-transition: opacity 1s ease-in-out;
  transition: opacity 1s ease-in-out;
    z-index: -1;
}

@-webkit-keyframes cf4FadeInOut {
 0% {
  opacity:1;
}
15% {
opacity:1;
}
55% {
opacity:0;
}
100% {
opacity:0;
}
}

@-moz-keyframes cf4FadeInOut {
 0% {
  opacity:1;
}
15% {
opacity:1;
}
55% {
opacity:0;
}
100% {
opacity:0;
}
}

@-o-keyframes cf4FadeInOut {
 0% {
  opacity:1;
}
15% {
opacity:1;
}
55% {
opacity:0;
}
100% {
opacity:0;
}
}

@keyframes cf3FadeInOut {
  0% {
  opacity:1;
}
15% {
opacity:1;
}
55% {
opacity:0;
}
100% {
opacity:0;
}
}

#cf img {
  animation-name: cf3FadeInOut;
animation-timing-function: ease-in-out;
animation-iteration-count: infinite;
animation-duration: 4s;
animation-direction: alternate;
}

#cf img:nth-of-type(1) { /* Wakame */
  -webkit-animation-delay: 24s;
  -moz-animation-delay: 24s;
  -o-animation-delay: 24s;
  animation-delay: 24s;
}
#cf img:nth-of-type(2) { /*Meraki */
  -webkit-animation-delay: 20s;
  -moz-animation-delay: 20s;
  -o-animation-delay: 20s;
  animation-delay: 20s;
}
#cf img:nth-of-type(3) { /* Trabzoni */
  -webkit-animation-delay: 16s;
  -moz-animation-delay: 16s;
  -o-animation-delay: 16s;
  animation-delay: 16s;
}
#cf img:nth-of-type(4) { /* SPS */
  -webkit-animation-delay: 12s;
  -moz-animation-delay: 12s;
  -o-animation-delay: 12s;
  animation-delay: 12s;
}

#cf img:nth-of-type(5) { /* Balad */
  -webkit-animation-delay: 8s;
  -moz-animation-delay: 8s;
  -o-animation-delay: 8s;
  animation-delay: 8s;
}

#cf img:nth-of-type(6) { /* Wesal */
  -webkit-animation-delay: 4s;
  -moz-animation-delay: 4s;
  -o-animation-delay: 4s;
  animation-delay: 4s;
}

<div id="cf">
   <img class="img-responsive" src="http://ddragon.leagueoflegends.com/cdn/img/champion/splash/Ezreal_0.jpg" />
   <img class="img-responsive" src="http://vignette2.wikia.nocookie.net/leagueoflegends/images/6/6b/Ezreal_NottinghamSkin.jpg/revision/latest?cb=20160518164441" />
   <img class="img-responsive" src="https://s-media-cache-ak0.pinimg.com/originals/a3/99/59/a399593448b739ee3cb164f74f22d89a.jpg" />
   <img class="img-responsive" src="https://i.ytimg.com/vi/nOmafJzhUrk/maxresdefault.jpg" />
   <img class="img-responsive" src="http://art-of-lol.com/wp-content/uploads/2015/12/ezreal_by_cglas-d8smd2g.jpg" />
   <img class="img-responsive" src="http://pre14.deviantart.net/81ae/th/pre/i/2015/345/5/c/ezreal_by_tanzenkat-d9jrcvc.jpg" />
   </div>

此外，除了时间，当图像交叉淡入淡出时，在第二张图像之后，它会一直回到第一张图像，而其余部分则不会显示或很快显示和淡化。

Answer 1

我想在每张图片之间延迟4秒或4秒，但事实并非如此工作

为了使时机正确，你需要记住一些计算。

确定每张图片需要多长时间才能淡入。让我们假设你想要 1秒让图片从0不透明度淡入1。
确定每个图像应保持可见的时间长度。假设您希望图像在 4秒时保持1个不透明度。
确定下一张图片的启动时间。这将成为两个图像之间的间隔。这应该比你在第2步得到的要大。你有1s出现，4s保持显示。所以这至少 5秒。将此值以增量方式应用于每个图像的animation-delay。
将此数字乘以图像总数。这将变为总animation-duration。在这种情况下，您在步骤＃3中计算5秒，并且您有6张图像。因此，animation-duration将为5 x 6 = 30，即 30秒。
将100%除以您在步骤＃4中获得的数字。这将成为keyframes。在这种情况下，您有30秒的动画持续时间。因此，您的关键帧将以每个关键帧的100% / 30 = 3.33，即 3.33％为步长。每帧将代表1秒。
在这些帧上推断您的步骤＃1和＃2值。即对于3.33%，您将有opacity: 1在1秒后显示图像。然后，对于6.66%，9.99%和13.33%中的每一个，它将保持为opacity:1。即从0开始持续4秒，图像将保持可见。然后在帧16.65上将不透明度恢复为0.即在第5秒，图像将淡出。然后保持隐藏直到100％，即直到所有剩余的25秒。

把这一切放在一起，你得到：

从步骤3开始：

#cf img:nth-child(1) { animation-delay: 0s; }
#cf img:nth-child(2) { animation-delay: 5s; }
#cf img:nth-child(3) { animation-delay: 10s; }
#cf img:nth-child(4) { animation-delay: 15s; }
#cf img:nth-child(5) { animation-delay: 20s; }
#cf img:nth-child(6) { animation-delay: 25s; }

从第4步开始：

#cf img { animation: fader 30s linear infinite; }

并且，从步骤＃5和＃6（从步骤＃1和＃2 推断）：

@keyframes fader {
    0% { opacity: 0; } 
    03.33% { opacity: 1; }
    06.66% { opacity: 1; }
    09.99% { opacity: 1; }
    13.33% { opacity: 1; }
    16.65% { opacity: 0; }
    100% { opacity: 0; }
}

就是这样。以下是完整的代码段：

<强>段：

html, body { height: 100%; width: 100%; overflow: hidden; }
#cf {
  position: relative; margin: 0 auto; 
  width: 100%; height: 100%;
}
#cf img { 
  position: absolute; left: 0; top: 0; opacity: 0; 
  animation: fader 30s linear infinite;
}

#cf img:nth-child(1) { animation-delay: 0s; }
#cf img:nth-child(2) { animation-delay: 5s; }
#cf img:nth-child(3) { animation-delay: 10s; }
#cf img:nth-child(4) { animation-delay: 15s; }
#cf img:nth-child(5) { animation-delay: 20s; }
#cf img:nth-child(6) { animation-delay: 25s; }

@keyframes fader {
  0% { opacity: 0; } 
  03.33% { opacity: 1; }
  06.66% { opacity: 1; }
  09.99% { opacity: 1; }
  13.33% { opacity: 1; }
  16.65% { opacity: 0; }
  100% { opacity: 0; }
}

<div id="cf">
  <img class="img-responsive" src="http://ddragon.leagueoflegends.com/cdn/img/champion/splash/Ezreal_0.jpg" />
  <img class="img-responsive" src="http://vignette2.wikia.nocookie.net/leagueoflegends/images/6/6b/Ezreal_NottinghamSkin.jpg/revision/latest?cb=20160518164441" />
  <img class="img-responsive" src="https://s-media-cache-ak0.pinimg.com/originals/a3/99/59/a399593448b739ee3cb164f74f22d89a.jpg" />
  <img class="img-responsive" src="https://i.ytimg.com/vi/nOmafJzhUrk/maxresdefault.jpg" />
  <img class="img-responsive" src="http://art-of-lol.com/wp-content/uploads/2015/12/ezreal_by_cglas-d8smd2g.jpg" />
  <img class="img-responsive" src="http://pre14.deviantart.net/81ae/th/pre/i/2015/345/5/c/ezreal_by_tanzenkat-d9jrcvc.jpg" />
</div>

CSS交叉淡入淡出动画

1 个答案: