CSS3两个动画顺序衔接播放

问题描述：

第一个动画先播放，播放完成后，第二个动画紧接着播放。

解决办法：

1. 将第二个的延迟时间（animation-delay）设置成第一个的持续时间( animation-duration );

2. 多个动画应用时用逗号分隔开;

此时，CSS3的动画代码就要分开写了，不能再简写了，诸如animation:rotate-back 10000ms linear infinite这样的简写就是不行的，因为在同一代码中要加入两个动画，代码如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
body{background:#666;}
img
{
position:absolute;left:200px;top:100px;
animation-name:myfirst, rotate-back;
animation-duration:1000ms, 10000ms;
animation-timing-function:linear, linear;
animation-delay:0, 1000ms;
animation-iteration-count:1, infinite;
animation-fill-mode:forwards, none;
-moz-animation-name:myfirst, rotate-back;
-moz-animation-duration:1000ms, 10000ms;
-moz-animation-timing-function:linear, linear;
-moz-animation-delay:0, 1000ms;
-moz-animation-iteration-count:1, infinite;
-moz-animation-fill-mode:forwards, none;
-ms-animation-name:myfirst, rotate-back;
-ms-animation-duration:1000ms, 10000ms;
-ms-animation-timing-function:linear, linear;
-ms-animation-delay:0, 1000ms;
-ms-animation-iteration-count:1, infinite;
-ms-animation-fill-mode:forwards, none;
-o-animation-name:myfirst, rotate-back;
-o-animation-duration:1000ms, 10000ms;
-o-animation-timing-function:linear, linear;
-o-animation-delay:0, 1000ms;
-o-animation-iteration-count:1, infinite;
-o-animation-fill-mode:forwards, none;
-webkit-animation-name:myfirst, rotate-back;
-webkit-animation-duration:1000ms, 10000ms;
-webkit-animation-timing-function:linear, linear;
-webkit-animation-delay:0, 1000ms;
-webkit-animation-iteration-count:1, infinite;
-webkit-animation-fill-mode:forwards, none;
}

/*myfirst*/
@keyframes myfirst {
 from {top:-50px;}
 to {top:100px;}
}

@-moz-keyframes myfirst {
  from {top:-70px;}
 to {top:100px;}
}

@-webkit-keyframes myfirst {
  from {top:-300px;}
 to {top:100px;}
}

@-ms-keyframes myfirst {
  from {top:-300px;}
 to {top:100px;}
}

@-o-keyframes myfirst {
  from {top:-300px;}
 to {top:100px;}
}
 
/*rotate-back*/
@keyframes rotate-back {
 from {     
    -webkit-transform: rotate(0deg);
       -moz-transform: rotate(0deg);
       -o-transform: rotate(0deg);
       -ms-transform: rotate(0deg);
       transform: rotate(0deg);
 }
 to {
    -webkit-transform: rotate(-360deg);
       -moz-transform: rotate(-360deg);
       -o-transform: rotate(-360deg);
       -ms-transform: rotate(-360deg);
       transform: rotate(-360deg);
 }
}

@-moz-keyframes rotate-back {
 from {
   -moz-transform: rotate(0deg);
   transform: rotate(0deg);
 }
 to {
   -moz-transform: rotate(-360deg);
   transform: rotate(-360deg);
 }
}

@-webkit-keyframes rotate-back {
 from {
   -webkit-transform: rotate(0deg);
   transform: rotate(0deg);
 }
 to {
   -webkit-transform: rotate(-360deg);
   transform: rotate(-360deg);
 }
}

@-ms-keyframes rotate-back {
 from {
   -ms-transform: rotate(0deg);
   transform: rotate(0deg);
 }
 to {
   -ms-transform: rotate(-360deg);
   transform: rotate(-360deg);
 }
}

@-o-keyframes rotate-back {
 from {
   -o-transform: rotate(0deg);
   transform: rotate(0deg);
 }
 to {
   -o-transform: rotate(-360deg);
   transform: rotate(-360deg);
 }
}
</style>
</head>

<body> 
<img src="images/s_star.png" alt="" class="s_star"> 
</body>
</html>