animation-name 动画名称，可以有多个值，用逗号隔开，表示绑定了多个动画
animation-name兼容主流的浏览器，不过还是需要加前缀去兼容
animation-name有两个属性值，分别是keyframename和none
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
body{
margin:0 auto;
background:#abcdef;
}
div{
width:800px;
height:800px;
margin:0 auto;
}
.container{
position: relative;
}
.inner, .middle, .outer, .pic{
position: absolute;
top:0;
right:0;
bottom:0;
left:0;
margin:auto;
}
.inner{
background:url(source/circle_inner.jpg) center no-repeat;
animation-name:circle_inner;
}
.middle{
background:url(source/circle_middle.jpg) center no-repeat;
animation-name:circle_middle;
}
.outer{
background:url(source/circle_outer.jpg) center no-repeat;
animation-name:circle_outer;
}
.pic{
background:url(source/pic.jpg) center no-repeat;
}
</style>
</head>
<body>
<div class="container">
<div class="inner"></div>
<div class="middle"></div>
<div class="outer"></div>
<div class="pic"></div>
</div>
</body>
</html>
animation-duration 动画持续时间 默认是0
animation-timing-function 动画时间函数
animation-delay 动画延迟时间
animation-delay 属性定义动画什么时候开始，单位可以是秒（s）或毫秒（ms），允许负值，-2s使动画马上开始，但会跳过2s进入动画
animation-iteration-count 动画循环次数
animation-iteration-count: number | infinite 默认为1
animation-direction: normal | reverse | alternate | alternate-reverse 正常； 反向； 正反交替； 反正交替
alternate 和 alternate-reverse ，如果animation-itreation-count 不是设置成 infinite ，则只会执行一次就停止
animation-fill-mode 动画延迟未执行时，或者动画执行完毕后的停留状态（动画不能设置为循环，否则无法停止）
animation-fill-mode: none | forwards | backwards | both 无 结束状态 开始状态 看情况
animation-play-state: running | paused 动画运行状态：运行 | 暂停
animation 简写
animation: name duration timing-function delay iteration-count direction fill-mode play-state
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
body{
margin:0 auto;
background:#abcdef;
}
div{
width:800px;
height:800px;
margin:0 auto;
}
.container{
position: relative;
-webkit-transform-style:preserve-3d;
-moz-transform-style:preserve-3d;
-ms-transform-style:preserve-3d;
-o-transform-style:preserve-3d;
transform-style:preserve-3d;
}
.inner, .middle, .outer, .pic{
position: absolute;
top:0;
right:0;
bottom:0;
left:0;
margin:auto;
}
.container:hover div{
-webkit-animation-play-state:paused;
-moz-animation-play-state:paused;
-ms-animation-play-state:paused;
-o-animation-play-state:paused;
animation-play-state:paused;
}
.inner{
background:url(source/circle_inner.jpg) center no-repeat;
/*循环*/
-webkit-animation:circle_inner 10s ease-in-out 1s infinite alternate running;
-moz-animation:circle_inner 10s ease-in-out 1s infinite alternate running;
-ms-animation:circle_inner 10s ease-in-out 1s infinite alternate running;
-o-animation:circle_inner 10s ease-in-out 1s infinite alternate running;
animation:circle_inner 10s ease-in-out 1s infinite alternate running;
/*不循环，填充效果*/
/*-webkit-animation:circle_inner 10s ease-in-out 1s forwards running;
-moz-animation:circle_inner 10s ease-in-out 1s forwards running;
-ms-animation:circle_inner 10s ease-in-out 1s forwards running;
-o-animation:circle_inner 10s ease-in-out 1s forwards running;
animation:circle_inner 10s ease-in-out 1s forwards running;*/
}
.middle{
background:url(source/circle_middle.jpg) center no-repeat;
-webkit-animation:circle_middle 10s ease-in-out 1s infinite alternate running;
-moz-animation:circle_middle 10s ease-in-out 1s infinite alternate running;
-ms-animation:circle_middle 10s ease-in-out 1s infinite alternate running;
-o-animation:circle_middle 10s ease-in-out 1s infinite alternate running;
animation:circle_middle 10s ease-in-out 1s infinite alternate running;
}
.outer{
background:url(source/circle_outer.jpg) center no-repeat;
-webkit-animation:circle_outer 10s ease-in-out 1s infinite alternate running;
-moz-animation:circle_outer 10s ease-in-out 1s infinite alternate running;
-ms-animation:circle_outer 10s ease-in-out 1s infinite alternate running;
-o-animation:circle_outer 10s ease-in-out 1s infinite alternate running;
animation:circle_outer 10s ease-in-out 1s infinite alternate running;
}
.pic{
background:url(source/pic.jpg) center no-repeat;
}
@keyframes circle_inner{
0%{ transform:rotateX(0deg); }
50%{ transform:rotateX(90deg); }
100%{ transform:rotateX(360deg); }
}
@keyframes circle_middle{
0%{ transform:rotateY(0deg); }
50%{ transform:rotateY(90deg); }
100%{ transform:rotateY(360deg); }
}
@keyframes circle_outer{
0%{ transform:rotateZ(0deg); }
50%{ transform:rotateZ(90deg); }
100%{ transform:rotateZ(360deg); }
}
</style>
</head>
<body>
<div class="container">
<div class="inner"></div>
<div class="middle"></div>
<div class="outer"></div>
<div class="pic"></div>
</div>
</body>
</html>
动画性能优化：
用position-fixed代替background-attachment
带图片的元素放在伪元素中
will-change
兼容性IE13+ 感觉可以放弃了……
向下提示箭头效果
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
body{
margin:0 auto;
background:#abcdef;
}
div{
width:30px;
height:30px;
position: fixed;
left:0;
right:0;
bottom:100px;
margin:0 auto;
cursor:pointer;
-webkit-transform:rotate(90deg);
-moz-transform:rotate(90deg);
-ms-transform:rotate(90deg);
-o-transform:rotate(90deg);
transform:rotate(90deg);
-webkit-animation:upDown 2s ease-in-out infinite;
-moz-animation:upDown 2s ease-in-out infinite;
-ms-animation:upDown 2s ease-in-out infinite;
-o-animation:upDown 2s ease-in-out infinite;
animation:upDown 2s ease-in-out infinite;
}
@-webkit-keyframes upDown{
0%{ bottom:100px; }
50%{ bottom:80px; }
100%{ bottom:100px; }
}
@-moz-keyframes upDown{
0%{ bottom:100px; }
50%{ bottom:80px; }
100%{ bottom:100px; }
}
@-ms-keyframes upDown{
0%{ bottom:100px; }
50%{ bottom:80px; }
100%{ bottom:100px; }
}
@-o-keyframes upDown{
0%{ bottom:100px; }
50%{ bottom:80px; }
100%{ bottom:100px; }
}
@keyframes upDown{
0%{ bottom:100px; }
50%{ bottom:80px; }
100%{ bottom:100px; }
}
</style>
</head>
<body>
<div>></div>
</body>
</html>
总结
