主要知识点

① transform属性:

    ratate(旋转度数)

    scale(等比例缩放)

    skew(x , y);让元素倾斜显示,包含两个参数值,分别表示X轴和Y轴倾斜的角度,如果第二个参数为空,则默认为0,参数为负表示向相反方向倾斜。

②animate 适用于鼠标经过产生宽度,高度,left,top等等 示例 transition:1s ease all;所有事件产生动画!

 

div {
  -webkit-animation-name: pulse;
  -webkit-animation-duration: 2s;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-timing-function: ease-in-out;
  -webkit-animation-direction: alternate;
}
@-webkit-keyframes pulse {
 from {
   opacity: 0.0;
   font-size: 100%;
 }
 to {
   opacity: 1.0;
   font-size: 200%;
 }
}

style

*{ margin: 0; padding: 0;}

 

body {
overflow: hidden;
}
#clouds{
background:-webkit-linear-gradient(top,#c9dbe9 0%,#fff 100%);/*等价于background:-webkit-gradient(linear,left top,left bottom,from(c9dbe9),to(#fff))*/
background:-moz-linear-gradient(top,#c9dbe9 0%,#fff 100%);
background:-o-linear-gradient(top,#c9dbe9 0%,#fff 100%);
padding:100px 0px;

}
.cloud{
width:200px;
height:60px;
background:#FFF;
border-radius:200px;
-webkit-border-radius:200px;
-moz-border-radius:200px;
-o-border-radius:200px;
position:relative;}
.cloud:after,.cloud:before{
content:'';
position:absolute;
background:#FFF;
width:100px;
height:80px;
top:-15px;
left:10px;
border-radius:100px;
-webkit-border-radius:100px;
-moz-border-radius:100px;
-o-border-radius:100px;}
.cloud:after{
width:120px;
height:120px;
top:-55px;
left:auto;
right:15px;}
.x1{
-webkit-animation:moveclouds 25s linear infinite;
-moz-animation:moveclouds 25s linear infinite;
-o-animation:moveclouds 25s linear infinite;}
.x2{
left:200px;
transform:scale(0.6);
-webkit-transform:scale(0.6);
-moz-transform:scale(0.6);
-o-transform:scale(0.6);
opacity:0.6;
animation:moveclouds 25s linear infinite;
-webkit-animation:moveclouds 25s linear infinite;
-moz-animation:moveclouds 25s linear infinite;
-o-animation:moveclouds 25s linear infinite;}
.x3{
top:-200px;
left:-250px;
transform:scale(0.6);
-webkit-transform:scale(0.6);
-moz-transform:scale(0.6);
-o-transform:scale(0.6);
opacity:0.6;
animation:moveclouds 25s linear infinite;
-webkit-animation:moveclouds 25s linear infinite;
-moz-animation:moveclouds 25s linear infinite;
-o-animation:moveclouds 25s linear infinite;}
.x4{
top:200px;
left:470px;
transform:scale(0.6);
-webkit-transform:scale(0.6);
-moz-transform:scale(0.6);
-o-transform:scale(0.6);
opacity:0.6;
animation:moveclouds 25s linear infinite;
-webkit-animation:moveclouds 25s linear infinite;
-moz-animation:moveclouds 25s linear infinite;
-o-animation:moveclouds 25s linear infinite;}
.x5{
left:470px;
top:-250px;
transform:scale(0.8);
-webkit-transform:scale(0.8);
-moz-transform:scale(0.8);
-o-transform:scale(0.8);
opacity:0.8;
animation:moveclouds 25s linear infinite;
-webkit-animation:moveclouds 18s linear infinite;
-moz-animation:moveclouds 18s linear infinite;
-o-animation:moveclouds 18s linear infinite;}

 

@-webkit-keyframes moveclouds{
0%{margin-left:1000px;}
100%{margin-left:-1000px;}
}
@-moz-keyframes moveclouds{
0%{margin-left:1000px;}
100%{margin-left:-1000px;}
}
@-o-keyframes moveclouds{
0%{margin-left:1000px;}
100%{margin-left:-1000px;}
}

html

<div id="clouds">
  <div class="cloud x1"></div>
  <div class="cloud x2"></div>
  <div class="cloud x3"></div>
  <div class="cloud x4"></div>
  <div class="cloud x5"></div>
</div>

 

posted on 2013-03-18 13:01  apple_半个苹果  阅读(445)  评论(1编辑  收藏  举报