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实例 1、
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>元素对齐</title>
</head>
<body>
<h3>元素对齐方式</h3>
1.子元素是行内元素：如a,span <br>
<style>
.box1 {
width: 200px;
height:200px;
background-color: green;
text-align: center;
}
.box1 a{
line-height: 200px;
}
</style>
<div class="box1">
<a hret="">php中文网</a>
</div>
2.子元素是多行的内联本文
<style>
.box2 {
width: 200px;
height:200px;
background-color: red;
text-align: center;
display: table-cell;
vertical-align: middle;
}
</style>
<div class=" text-align: center; box2">
<span>php中文网</span> <br>
<span>www.php.cn</span>
</div>
3.子元素是块元素
<style>
.box3 {
width: 200px;
height:200px;
background-color: red;
display:table-cell ;
vertical-align: middle;
}
.box3 .child {
width: 100px;
height:100px;
background-color: lightgreen;
margin:auto ;
}
</style>
<div class="box3">
<div class="child"></div>
</div>
4.子元素是不定宽的块元素
<style>
.box4 {
width: 200px;
height:200px;
background-color: pink;
display:table-cell ;
text-align: center ;
vertical-align: bottom;
}
.box4 li {
display:inline ;
}
</style>
<div class="box4">
<ul>
<li><a href=“”>1</a></li>
<li><a href="">2</a></li>
<li><a href="">3</a></li>
<li><a href="">4</a></li>
<li><a href="">5</a></li>
</ul>
</div>
</body>
</html>
2、
<!<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>决对定位</title>
</head>
<body>
<style>
body{
margin: 0;
}
.box {
width: 600px;
height:600px;
/*background-color: wheat;*/
/*position: absolute;*/
}
.box1 {
width: 200px;
height:200px;
background-color: green;
position: absolute;
top:0;
left:200px;
}
.box2{
width: 200px;
height:200px;
background-color: pink;
position: absolute;
top:200px;
left:0;
}
.box3 {
width: 200px;
height:200px;
background-color: darkred;
position: absolute;
top:200px;
left:400px;
}
.box4 {
width: 200px;
height:200px;
background-color: blue;
position: absolute;
top:400px;
left:200px;
}
</style>
<div class="box">
<div class="box1"></div>
<div class="box2"></div>
<div class="box3"></div>
<div class="box4"></div>
</div>
</body>
</html>
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