盒子水平居中,垂直居中办法
1.定位(父相子决)
<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;
box-sizing: border-box;
}
.father {
position: relative;
width: 400px;
height: 400px;
background-color: blue;
margin: 50px auto 0;
}
.son {
/* 绝对定位 */
position: absolute;
left: 50%;
top: 50%;
/* margin-left: -100px;
margin-top: -100px; */
/* pc端 布局 有兼容性问题 */
/* 移动可以放心使用 */
transform: translate(-50%, -50%);
width: 200px;
height: 200px;
background-color: pink;
}
/*
请使用多种方式让盒子水平垂直居中
1 let:50%;top: 50%; 使用margin负值移动盒子自身的一半
2 使用transform移动(百分比)
3 flex布局()
*/
</style>
</head>
<body>
<div class="father">
<div class="son"></div>
</div>
</body>
</html>
结果图:
2.flex布局:一定要给父盒子设置flex布局,在父盒子里设置水平居中和垂直居中.
<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>
.father{
display: flex;
justify-content: center;
align-items: center;
width: 300px;
height: 300px;
margin: 0 auto;
background-color: yellow;
}
.son{
width: 150px;
height: 150px;
background-color: red;
}
</style>
</head>
<body>
<div class="father">
<div class="son">
</div>
</div>
</body>
</html>
