需求：随着数字的变动要求有时钟翻动动效
问题：只在加载时有动效
解决方案：通过判断数字改变（这里通过新旧数值变动来判断，不贴代码啦），每次变动的时候手动把animationIterationCount设置为infinite（持续动画），半秒后改为1（动画只执行一次），
特效参考代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>数字翻牌效果</title>
<style>
body {
margin: 0 auto;
padding: 0;
text-align: center;
}
.container {
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
width: 908px;
height: 150px;
background-color: #cc3131;
border-bottom: 5px solid #ff8b8b;
border-radius: 12px;
}
.item {
position: relative;
margin: 8px 5px 0;
display: inline-block;
width: 72px;
height: 130px;
/*background-color: #fe4e4e;*/
background: -webkit-linear-gradient(#a42121, #fe4e4e, #bd2a2a); /* Safari 5.1 - 6.0 */
background: -o-linear-gradient(#a42121, #fe4e4e, #bd2a2a); /* Opera 11.1 - 12.0 */
background: -moz-linear-gradient(#a42121, #fe4e4e, #bd2a2a); /* Firefox 3.6 - 15 */
background: linear-gradient(#a42121, #fe4e4e, #bd2a2a); /* 标准的语法 */
border-radius: 12px;
}
.under, .on {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
line-height: 130px;
color: #FACA38;
font-size: 80px;
border-radius: 12px;
overflow: hidden;
}
.bottom {
position: absolute;
left: 0;
top: 50%;
width: 100%;
height: 50%;
line-height: 0;
overflow: hidden; /*不加这行就不会隐藏掉上面那半个数字部分*/
background: -webkit-linear-gradient(#fe4e4e, #bd2a2a); /* Safari 5.1 - 6.0 */
background: -o-linear-gradient(#fe4e4e, #bd2a2a); /* Opera 11.1 - 12.0 */
background: -moz-linear-gradient( #fe4e4e, #bd2a2a); /* Firefox 3.6 - 15 */
background: linear-gradient(#fe4e4e, #bd2a2a); /* 标准的语法 */
}
.animate {
animation-name: flip;
animation-duration: 1s;
animation-direction: normal;
animation-fill-mode: forwards;
}
.animate1 {
animation-delay: .3s;
-webkit-animation-delay: .3s;
}
.animate2 {
animation-delay: .6s;
}
.animate3 {
animation-delay: .9s;
}
.animate4 {
animation-delay: 1.2s;
}
.animate5 {
animation-delay: 1.5s;
}
.animate6 {
animation-delay: 1.8s;
}
.animate7 {
animation-delay: 2.1s;
}
.animate8 {
animation-delay: 2.4s;
}
.animate9 {
animation-delay: 2.7s;
}
@keyframes flip{
from {
transform: rotateX(180deg);
width: 100%;
}
to {
transform: rotateX(0);
}
}
</style>
</head>
<body>
<div class="container">
<div class="item">
<!--底下那层-->
<div class="under">9</div>
<!--上面会翻动的那层-->
<div class="on animate animate0">
<!--只需要下面那一半-->
<div class="bottom">9</div>
</div>
</div>
<div class="item">
<div class="under">8</div>
<div class="on animate animate1">
<div class="bottom">
<div class="num">8</div>
</div>
</div>
</div>
<div class="item">
<div class="under">7</div>
<div class="on animate animate2">
<div class="bottom">
<div class="num">7</div>
</div>
</div>
</div>
<div class="item">
<div class="under">6</div>
<div class="on animate animate3">
<div class="bottom">
<div class="num">6</div>
</div>
</div>
</div>
<div class="item">
<div class="under">5</div>
<div class="on animate animate4">
<div class="bottom">
<div class="num">5</div>
</div>
</div>
</div>
<div class="item">
<div class="under">4</div>
<div class="on animate animate5">
<div class="bottom">
<div class="num">4</div>
</div>
</div>
</div>
<div class="item">
<div class="under">3</div>
<div class="on animate animate6">
<div class="bottom">
<div class="num">3</div>
</div>
</div>
</div>
<div class="item">
<div class="under">2</div>
<div class="on animate animate7">
<div class="bottom">
<div class="num">2</div>
</div>
</div>
</div>
<div class="item">
<div class="under">1</div>
<div class="on animate animate8">
<div class="bottom">
<div class="num">1</div>
</div>
</div>
</div>
<div class="item">
<div class="under">0</div>
<div class="on animate animate9">
<div class="bottom">
<div class="num">0</div>
</div>
</div>
</div>
</div>
</body>
</html>