CSS变形与动画（三）：animation帧动画详解（用法 + 四个例子）

news2024/11/23 9:01:27

文章目录

- animation 帧动画
- - 使用
  - 定义
  - 例子1 字母
  - 例子2 水滴
  - 例子3 会动的边框
  - 例子4 旋转木马

animation 帧动画

定义好后作用于需要变化的标签上。

使用

animation-name 设置动画名称
animation-duration: 设置动画的持续时间
animation-timing-function 设置动画渐变速度
animation-delay 设置动画延迟时间
animation-iteration-count 设置动画执行次数无穷次（infinite）
animation-direction 设置动画的方向值有alternate（交替）
animation-play-state 设置动画播放的状态值 paused（暂停）
也可以向 transiton 那样多种属性写在一起，如：

animation: dh 4s linear 0s infinite alternate;

定义

@keyframes 动画的名称{  
    百分数 | to | from {  
        .....  
    }  
}

例子1 字母

在这里插入图片描述

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        @keyframes dh {
            30% {
                width:200px;
                margin-left: 5px;
                background: blue;
                border-radius: 10%;
                border: 5px solid yellow;
            }
            50% {
                height: 300px;
                margin-left: 100px;
                background: yellow;
                border-radius: 50%;
                border: 5px solid white;
            }
            100% {
                height: 200px;
                margin-left: 500px;
                background: white;
                border-radius: 100%;
                border: 5px solid blue;
            }
        }
        .mb{
            height:600px;
            padding:50px ;
            display: flex;
            background: pink;
            align-items: center;
        }
        .b{
            border: 5px solid black;
            width:150px;
            background: red;
            height: 150px;
            animation:  4s linear 0s infinite alternate dh;
        }
    </style>
</head>
<body>
    <div class="mb">
        <div class="b">

        </div>
    </div>
</body>
</html>

例子2 水滴

水滴：除了不太像，还是挺像的。。。
在这里插入图片描述

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        body{
            height:100vh;
            background: #81ecec;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        body .sd{
            width:300px;
            height: 300px;
            background: rgb(255,255,255,0.1);
            border-radius: 36% 64% 73% 27% / 37% 57% 43% 63% ;
            box-shadow: 10px 10px 20px #518a8a, 5px 5px 20px #518a8a inset,
            -10px -10px 30px #c5f2f2 inset;
            padding: 20px;
            animation: dh 5s ease alternate infinite;
        }   
        body .sd::after{
            margin-top: 10px;
            margin-left: 70px;
            float: left;
            content:" ";
            width:40px;
            height:40px;
            background: rgb(255,255,255,0.1);
            border-radius: 36% 64% 73% 27% / 37% 57% 43% 63% ;
            box-shadow: -2px -2px 30px #cff6f6 inset;
        }
        body .sd::before{
            margin-top: 40px;
            margin-left: 70px;
            float: left;
            content:" ";
            width:20px;
            height:20px;
            background: rgba(145, 237, 237, 0.1);
            border-radius: 36% 64% 73% 27% / 37% 57% 43% 63% ;
            box-shadow: -2px -2px 30px #cff3f3 inset;
        }
        @keyframes dh {
            30%{
                border-radius: 65% 35% 56% 44% / 48% 41% 59% 52% ;
                width:350px;
                height: 350px;
            }
            50%{
                border-radius: 40% 60% 28% 72% / 70% 71% 29% 30% ;
                width:325px;
                height: 320px;
            }
            80%{
                border-radius: 40% 60% 70% 30% / 74% 48% 52% 26% ;
                width:320px;
                height: 270px;
            }
            100%{
                border-radius: 46% 54% 17% 83% / 54% 38% 62% 46% ;
                width:275px;
                height: 300px;
            }
        }
    </style>
</head>
<body>
    <div class="sd">

    </div>
</body>
</html>

例子3 会动的边框

在这里插入图片描述

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        body{
            display: flex;
            height: 100vh;
            justify-content: center;
            align-items: center;
            background:#000;
        }

        .box{
            position: relative;
            overflow: hidden;
        }
        .box .txt{
            display: flex;
            font-size: 300px;
            background: linear-gradient(45deg, red, blue, green,pink);
            -webkit-background-clip: text;
            color:transparent;
            justify-content: center;
            align-items: center;
            padding:0 40px;
        }
        .box .xz{
            width:150px;
            height: 600px;
            position: absolute;
            top:50%;
            left: 50%;
            /* transform: translate(-50%, -50%); */
            background: linear-gradient(red, blue, green,pink);
            animation: dh 4s linear 0s infinite;
            transform-origin: 0 0 ;
            z-index: -2;
        }
        .box .txt::before{
            content:"";
            position:absolute;
            display: block;
            width:96%;
            height:94%;
            background: #000;
            z-index: -1;
        }
        @keyframes dh {
            0%{
                rotate: 0deg;
            }
            100%{
                rotate: 360deg;
            }
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="txt">
            Hello
        </div>
        <div class="xz">

        </div>
    </div>
</body>
</html>

例子4 旋转木马

在这里插入图片描述
可以自己往里面放点图片。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        body{
            display: flex;
            height:100vh;
            justify-content: center;
            align-items: center;
            background-color: black;
            perspective: 1000px;
        }
        .box{
            width:200px;
            height:200px;
            display: flex;
            position: relative;
            transform-style: preserve-3d;
            animation: action 30s linear infinite; 
        }
        .box .item{
            width:200px;
            height:200px;
            position: absolute;
            box-shadow: 0 0 20px white;
            -webkit-box-reflect: below 2px linear-gradient(transparent, rgba(0, 0, 0, .5));
        }
        .box .item:nth-child(1)
        {
            background-color: blue;
            transform: rotateY(0deg) translateZ(500px);
        }
        .box .item:nth-child(2)
        {
            background-color: pink;
            transform: rotateY(60deg) translateZ(500px) ;
        }
        .box .item:nth-child(3)
        {
            background-color: red;
            transform: rotateY(120deg) translateZ(500px) ;
        }
        .box .item:nth-child(4)
        {
            background-color: white;
            transform:rotateY(180deg) translateZ(500px) ;
        }
        .box .item:nth-child(5)
        {
            background-color: green;
            transform:rotateY(240deg) translateZ(500px) ;
        }
        .box .item:nth-child(6)
        {
            background-color: yellow;
            transform:rotateY(300deg) translateZ(500px) ;
        }
        @keyframes action{
            0%{
                transform: rotateX(-10deg) rotateY(0deg);
            }
            100%{
                transform: rotateX(-10deg)rotateY(360deg);
            }
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="item"></div>
        <div class="item"></div>
        <div class="item"></div>
        <div class="item"></div>
        <div class="item"></div>
        <div class="item"></div>
    </div>
</body>
</html>