先布局再想动画
动画与过渡的区别：
过渡效果通常用户与浏览器进行交互（例如 hover）
动画效果，可以交互，也可以在网页加载时直接执行，并且可以让效果更复杂。
动画属性(animation)
animation-name: 规定需要绑定到选择器的 keyframe 名称…
animation-duration: 规定完成动画所花费的时间，以秒或毫秒计。
animation-timing-function: 规定动画的速度曲线函数.
animation-delay: 规定在动画开始之前的延迟。
animation-iteration-count: 规定动画应该播放的次数。
infinite 无限次
keyframes
定义一个动画
- 按百分比指定动画
- from…to…指定动画
注意：开始与结束相同，可以让动画更平滑
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| @keyframes anim {
0% {
transform: translate(0px, 0px);
}
100% {
transform: translate(900px, 100px);
}
}
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停止动画效果
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| animation-play-state: paused；;
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示例代码
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| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
@keyframes anim {
0% {
transform: rotate(0deg);
}
20% {
width: 200px;
height: 200px;
transform: rotate(360deg);
}
40% {
background-color: yellow;
width: 300px;
height: 300px;
}
100% {
width: 100px;
height: 100px;
}
}
.box {
width: 100px;
height: 100px;
background-color: red;
margin: 100px auto;
animation: anim 10s linear;
}
</style>
</head>
<body>
<div class="box"></div>
</body>
</html>
|
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| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
@keyframes anim {
form {
transform: rotate(0deg);
}
to {
transform: rotate(360deg);
}
}
.box {
height: 200px;
width: 200px;
margin: 100px auto;
border-radius: 50%;
overflow: hidden;
animation: anim 5s linear;
}
.box img {
height: 200px;
width: 200px;
}
.box:hover {
animation-play-state: paused;
}
</style>
</head>
<body>
<audio src="" controls></audio>
<div class="box">
<img src="images/jay.jpg" alt="" />
</div>
</body>
</html>
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作业
海盗船
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| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>海盗船</title>
<style>
@keyframes wave {
50% {
transform: translate(-50px);
}
}
@keyframes ship {
50% {
transform: rotate(15deg);
}
}
@keyframes fish {
0% {
transform: rotate(-20deg);
left: 10px;
top: 500px;
}
10% {
transform: rotate(-5deg);
left: 300px;
top: 300px;
}
30% {
transform: rotate(-20deg);
left: 500px;
top: 550px;
}
50% {
transform: rotate(5deg);
left: 700px;
top: 300px;
}
70% {
transform: rotate(-20deg);
left: 800px;
top: 550px;
}
90% {
transform: rotate(5deg);
left: 1100px;
top: 300px;
}
100% {
transform: rotate(5deg);
left: 1300px;
top: 500px;
}
}
* {
margin: 0px;
padding: 0px;
}
.container {
width: 100%;
height: 800px;
overflow: hidden;
}
.bg {
position: absolute;
top: 0;
left: 0;
}
.fish {
position: absolute;
left: 10px;
top: 500px;
z-index: 3;
animation: fish 10s linear 1s infinite;
}
.sea {
margin-top: 450px;
position: relative;
}
.wave1 {
position: absolute;
top: 100px;
left: 0px;
height: 110px;
z-index: 100;
width: 130%;
animation: wave 2s ease-in infinite;
}
.wave2 {
position: absolute;
top: 50px;
left: 0px;
height: 110px;
width: 130%;
z-index: 10;
animation: wave 3s ease-in infinite;
}
.wave3 {
position: absolute;
top: 0px;
left: 0px;
height: 110px;
width: 130%;
z-index: 0;
animation: wave 5s ease-in infinite;
}
.ship {
position: absolute;
left: 30%;
z-index: 5;
animation: ship 5s ease infinite;
}
</style>
</head>
<body>
<div class="container">
<img src="images/bg.png" alt="" class="bg" />
<img src="images/ship.png" alt="" class="ship" />
<img src="images/fish.png" alt="" class="fish" />
<div class="sea">
<img class="wave1" src="images/wave1.png" alt="" />
<img class="wave2" src="images/wave2.png" alt="" />
<img class="wave3" src="images/wave3.png" alt="" />
</div>
</div>
</body>
</html>
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