CSS 水平，垂直，居中對(duì)齊
使用CSS屬性實(shí)現(xiàn)各種對(duì)齊，比如左對(duì)齊，居中對(duì)齊，右對(duì)齊，垂直居中對(duì)齊等
方法一： 使用float屬性設(shè)置左右對(duì)齊
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>實(shí)例</title>
<title>php.cn</title>
<style type="text/css">
.divcss5-left{float:left;width:250px;height:50px;border:1px solid #F00}
</style>
</head>
<body>
<div class="divcss5-left">此DIV靠左對(duì)齊顯示</div>
</body>
</html>方法二：使用margin屬性進(jìn)行中心對(duì)齊
只需要對(duì)要居中對(duì)齊的樣式加 margin:0 auto。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>實(shí)例</title>
<title>php.cn</title>
<style type="text/css">
.divcss5-cent{margin:0 auto;width:250px;height:50px;border:1px solid #F00}
</style>
</head>
<body>
<div class="divcss5-cent">此DIV居中對(duì)齊顯示</div>
</body>
</html>方法三：使用position屬性設(shè)置左，右對(duì)齊
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>實(shí)例</title>
<title>php.cn</title>
<style type="text/css">
.divcss5-cent
{
position:absolute;
right:0px;
width:250px;
height:50px;
border:1px solid #F00
}
</style>
</head>
<body>
<div class="divcss5-cent">此DIV右對(duì)齊顯示</div>
</body>
</html>使用多屬性實(shí)現(xiàn)垂直居中對(duì)齊：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>實(shí)例</title>
<title>php.cn</title>
<style type="text/css">
.wrp {
background-color: #b9b9b9;
width: 340px;
height: 260px;
}
.box {
color: white;
background-color: #3e8e41;
width: 200px;
height: 120px;
overflow: auto;
}
.wrp1 { position: relative; }
.box1 {
margin: auto;
position: absolute;
left: 0; right: 0; top: 0; bottom: 0;
}
</style>
<body>
<div class="wrp wrp1">
<div class="box box1">
<h3>完全居中：</h3>
<h3>利用css定位規(guī)則，設(shè)置左右、上下方向定位為0，margin為auto</h3>
</div>
</div>
</body>
</html>
