animation动画(1)

animation关键帧使用

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@keyframes [动画名字]{
    from{
        //起始
    }
    to{
        //结束
    }
    //也可以采用百分比来控制
    //始终从0%到100%变化，写的顺序不会影响效果，比如：先写100%，再写0%依旧是0~100变化
    //当起始或终点没设置时，系统会自动设置初始值为起始或终点状态(未延迟一般情况下)
    0%{
        //...
    }
    25%{
        //
    }
    100%{
        ..
    }
}

移动方块小栗子

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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>
        * {
            padding: 0;
            margin: 0;
        }

        body {
            width: 100vw;
            height: 100vh;
            background: #34495e;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        main {
            width: 400px;
            height: 400px;
            border: 1px solid wheat;
        }

        div {
            width: 100px;
            height: 100px;
            background-color: yellow;
            animation-name: hd;
            animation-duration: 4s;
        }

        @keyframes hd {
//可以同时声明关键帧规则
            25% {
                transform: translateX(300px);
                background-color:aqua;  //改变背景色
                border-radius: 50%;//变成圆
            }

            50% {
                transform: translate(300px, 300px);
                border-radius: 0%;//变成方块
            }

            75% {
                transform: translateY(300px);
                background-color:tomato;//改变背景色
                border-radius: 50%;//再变成圆
            }


        }
    </style>
</head>

<body>
    <main>
        <div>

        </div>
    </main>

</body>

</html>

多个动画使用

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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>
        * {
            padding: 0;
            margin: 0;
        }

        body {
            width: 100vw;
            height: 100vh;
            background: #34495e;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        main {
            width: 400px;
            height: 400px;
            border: 1px solid wheat;
        }

        div {
            width: 100px;
            height: 100px;
            background-color: yellow;
            animation-name: hd, bgc, changeshape, size;
            animation-duration: 4s, 2s, 2s;
        }

        @keyframes hd {

            25% {
                transform: translateX(300px);
            }

            50% {
                transform: translate(300px, 300px);
            }

            75% {
                transform: translateY(300px);
            }
        }

        @keyframes bgc {
            25% {
                background-color: beige;
            }

            50% {
                background-color: blue;
            }

            75% {
                background-color: violet;
            }
        }

        @keyframes changeshape {
            25% {
                border-radius: 50%;
            }

            50% {
                border-radius: 0%;
            }

            75% {
                border-radius: 50%;
            }
        }
    </style>
</head>

<body>
    <main>
        <div>

        </div>
    </main>

</body>

</html>
//多个动画效果可以叠加，可以自行设置动画生效的时间，如果参数不够则默认从头读取

动画属性中间值

有中间值才能变化

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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>
        *{
            margin: 0;
            padding: 0;
        }
        main{
            width: 100vw;
            height: 100vh;
            background-color: #34495e;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        div{
            height: 100px;
            width: 100px;
            border: 2px solid white;
           
            background-color: yellow;
            animation-name: scale;
            animation-duration: 2s;
        }

        @keyframes scale {
            to{
                height: 300px;
                width: 300px;
                border: 30px solid white;  //线慢慢变粗
               // border:30px dotted white  //瞬间变化
            }
        }

    </style>
</head>
<body>
    <main>
        <div></div>
    </main>
    
</body>
</html>

动画播放次数

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animation-iteration-count:num|infinite
可以指定次数，或无限循环，若缺省则从头选取补齐

心动

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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>
        main {
            height: 100vh;
            width: 100vw;
            background-color: rgb(11, 35, 116);
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .heart {
            width: 200px;
            height: 200px;
            background-color: red;
            transform: rotate(45deg) scale(.5);
            animation-name: hd;
            animation-duration: 2s;
            animation-iteration-count: infinite;
        }

        .heart::before {
            content: '';
            width: 200px;
            height: 200px;
            border-radius: 50%;
            position: absolute;
            background-color: red;
            transform: translateX(-100px);

        }

        .heart::after {
            content: '';
            width: 200px;
            height: 200px;
            border-radius: 50%;
            position: absolute;
            background-color: red;
            transform: translateY(-100px);
        }

        @keyframes hd {
            25%{
                opacity: 1;
                transform: rotate(45deg) scale(1);
            }
            50%{
                opacity: .5;
                transform: rotate(45deg) scale(.5);
            }
            75%{
                opacity: 1;
                transform: rotate(45deg) scale(1);
            }
            85%{
                opacity: .5;
                transform: rotate(45deg) scale(.5);
            }
            to{
                opacity: 1;
                transform: rotate(45deg) scale(1);
            }
        }
    </style>
</head>

<body>
    <main>
        <div class="heart"></div>
    </main>
</body>

</html>

动画的方向

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animation-direction:变化趋势
normal:从0到100，瞬间回到0
reverse:从100到0，瞬间回到100
alternate:缓慢从0到100再从100到0
alternate-reverse:缓慢从100到0再从0到100

示例

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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>
    <link href="//netdna.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css" rel="stylesheet">
    <style>
        *{
         	margin:0;
            padding:0;
        }
        main {
            height: 100vh;
            width: 100vw;
            background-color: rgb(11, 35, 116);
            display: flex;
            justify-content: center;
            align-items: center;
        }

        ul {
            list-style: none;
            display: flex;
            width: 500px;
            height: 120px;
        }

        li {
            color: red;
            flex: 1;
            /* border: solid 1px white; */
            display: flex;
            justify-content: center;
            position: relative;
        }

        i.fa {
            font-size: 3em;
            animation-name: hd;
            animation-duration: 2s;
            animation-iteration-count: infinite;
            position: absolute;
        }

        li:nth-child(1)>i {
            animation-direction: normal;
        }

        li:nth-child(2)>i {
            animation-direction: reverse;
        }

        li:nth-child(3)>i {
            animation-direction: alternate;
        }

        li:nth-child(4)>i {
            animation-direction: alternate-reverse;
        }

        span {
            position: absolute;
            bottom: 0;
        }

        @keyframes hd {
            to {
                transform: scale(3);
            }
        }
    </style>
</head>

<body>
    <main>
        <ul>
            <li>
                <i class="fa fa-heart" aria-hidden="true"></i>
                <span>normal</span>
            </li>
            <li>
                <i class="fa fa-heart" aria-hidden="true"></i>
                <span>reverse</span>
            </li>
            <li>
                <i class="fa fa-heart" aria-hidden="true"></i>
                <span>alternate</span>
            </li>
            <li>
                <i class="fa fa-heart" aria-hidden="true"></i>
                <span>alternate-reverse</span>
            </li>
        </ul>
    </main>
</body>

</html>

弹跳小球

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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>
    <link href="//netdna.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css" rel="stylesheet">
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        main {
            height: 100vh;
            width: 100vw;
            background-color: #34495e;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        div {
            height: 100px;
            width: 100px;
            background: radial-gradient(at center, #e67e22, #e74c3c);
            border-radius: 50%;
            animation-name: ball;
            animation-duration: 1s;
            z-index: 1;
            animation-iteration-count: infinite;
            animation-direction: alternate-reverse;
        }

        @keyframes ball {
            to {
                transform: translateY(-300px);
            }
        }

        section {
            width: 300px;
            height: 40px;
            background: rgba(0, 0, 0, 0.3);
            position: absolute;
            transform: translateY(50px);
            border-radius: 50%;
            z-index: 0;
            filter: blur(5px);
            animation-name: shadow;
            animation-duration: 1s;
            animation-iteration-count: infinite;
            animation-direction: alternate-reverse;
        }

        @keyframes shadow {
            to {
                width: 300px;
                height: 20px;
                filter: blur(35px);
                background: rgba(0, 0, 0, 0.1);
            }
        }
    </style>
</head>

<body>
    <main>
        <div></div>
        <section></section>
    </main>
</body>

</html>

延迟属性与帧延迟

写在帧里，则每一次都要延迟

而设定延迟属性只有第一次会延迟

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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>
    <link href="//netdna.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css" rel="stylesheet">
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        main {
            height: 100vh;
            width: 100vw;
            background-color: #34495e;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        div {
            height: 100px;
            width: 100px;
            background-color: #f1c40f;
            animation-name: scale;
            animation-duration: 4s;
            animation-delay: 2s;
            /*仅仅第一次等两秒*/
            animation-iteration-count: infinite;
        }

        /* 每次都要等两秒 */
        /* @keyframes scale {
            50%{
                transform: scale(1);
            }
            to{
                transform: scale(3);
            }
        } */

        @keyframes scale {
            to {
                transform: scale(3);
            }
        }
    </style>
</head>

<body>
    <main>
        <div></div>

    </main>
</body>

</html>

贝塞尔曲线控制动画速率

控制变化速率

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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>
    <link href="//netdna.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css" rel="stylesheet">
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        main {
            height: 100vh;
            width: 100vw;
            background-color: #34495e;
            display: grid;
            grid-template: 1fr/1fr;
        }

        ul {
            display: grid;
            grid-template: 1fr/repeat(6, 1fr);
            gap: 10px;
            list-style: none;

        }

        li {
            background-color: #e67e22;
            /* height: 50px; */
            animation-name: move;
            animation-duration: 3s;
            animation-iteration-count: infinite;
        }

        li:nth-child(1) {
            animation-timing-function: ease;
        }

        li:nth-child(2) {
            animation-timing-function: ease-in;
        }

        li:nth-child(3) {
            animation-timing-function: ease-out;
        }

        li:nth-child(4) {
            animation-timing-function: ease-in-out;
        }

        li:nth-child(5) {
            animation-timing-function: linear;
        }

        li:nth-child(6) {
            animation-timing-function: cubic-bezier(1, .01, 1, .65);
        }

        @keyframes move {
            to {
                transform: translateY(90vh);
            }
        }
    </style>
</head>

<body>
    <main>
        <ul>
            <li>ease</li>
            <li>ease-in</li>
            <li>ease-out</li>
            <li>ease-in-out</li>
            <li>linear</li>
            <li>set</li>
        </ul>

    </main>
</body>

</html>
CSS
#动画
animation动画(1)
https://blog-theta-ten.vercel.app/2021/07/24/animation动画/
作者
Chen
发布于
2021年7月24日
许可协议