html - 图片 CSS 过渡问题

Question

我有一个在四张图​​片之间转换的幻灯片。我让幻灯片以一定的速度播放，但最后一张幻灯片不会快速转换回第一张幻灯片。我试图添加另一个 nth，我试图减慢最后 nth，但它不起作用。我希望整张幻灯片在特定时间过渡，但最后一张幻灯片需要返回到第一张幻灯片，而不会出现巨大的黑色延迟。这是代码:

    .picTransition .item {
  position: absolute;
  left: 0;
  right: 0;
  opacity: 0;
  -webkit-animation: picTransition 56s linear infinite;
  -moz-animation: picTransition 56s linear infinite;
  -ms-animation: picTransition 56s linear infinite;
  animation: picTransition 56s linear infinite;
}
.picTransition .item:nth-child(2) {
  -webkit-animation-delay: 12s;
  -moz-animation-delay: 12s;
  -ms-animation-delay: 12s;
  animation-delay: 12s;
}
.picTransition .item:nth-child(3) {
  -webkit-animation-delay: 24s;
  -moz-animation-delay: 24s;
  -ms-animation-delay: 24s;
  animation-delay: 24s;
}
.picTransition .item:nth-child(4) {
  -webkit-animation-delay: 36s;
  -moz-animation-delay: 36s;
  -ms-animation-delay: 36s;
  animation-delay: 36s;
}

@-webkit-keyframes picTransition {
    0%, 25%, 100% { opacity: 0; }
    4.17%, 20.84% { opacity: 1;}
}
@-moz-keyframes picTransition {
    0%, 25%, 100% { opacity: 0; }
    4.17%, 20.84% { opacity: 1;}
}
@-ms-keyframes picTransition {
    0%, 25%, 100% { opacity: 0; }
    4.17%, 20.84% { opacity: 1;}
}
@keyframes picTransition {
    0%, 25%, 100% { opacity: 0; }
    4.17%, 20.84% { opacity: 1;}
}

我在这里做错了什么？

Answer 1

如果你有4张图片并且你设置了

animation-delay: 12s;

对于每一个，循环时间是 4 * 12 = 48s。

相反，您的循环时间为 56 秒

animation: picTransition 56s linear infinite;

这意味着结束时有 8 秒的间隔