<!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>
.box {
width: 450px;
height: 450px;
margin: 100px auto;
}
.box1 {
height: 450px;
background-image: url(./2_2_2.png);
}
.animation1 {
animation: moveimg 4s linear;
}
@keyframes moveimg {
0% {
width: 0px;
}
50% {
width: 50%;
}
100% {
width: 100%;
}
}
</style>
</head>
<body>
<div class="box">
<div class="box1 animation1"></div>
</div>
</body>
</html>
如果要无限重复动画的话，修改你的22行
.animation1 {
animation-name: moveimg;
animation-duration: 3s;
animation-iteration-count: infinite;
}
上面只是宽度循环变化，如果换成图片总体放大循环 代码如下：
<!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>
.box {
width: 450px;
height: 450px;
margin: 100px auto;
}
.box1 {
height: 450px;
position: relative;
}
.animation1 {
animation-name: moveimg;
animation-duration: 3s;
animation-iteration-count: infinite;
}
@keyframes moveimg {
0% {
transform: scale(0);
}
50% {
transform: scale(.5);
}
100% {
transform: scale(1);
}
}
</style>
</head>
<body>
<div class="box">
<div class="box1 ">
<img class="animation1" src="./2_2_2.png">
</div>
</div>
</body>
</html>