//固定宽度 <div class="container"></div> //100%宽度 <div class="container-fluid"></div>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scale=no">
<title>栅格系统</title>
<link rel="stylesheet" href="../bootstrap-3.3.4/css/bootstrap.min.css" rel="external nofollow" >
<style>
.a{
height:50px;
border: 1px solid black;
background-color: #ccc;
}
.b{
height:100px;
border: 1px solid black;
background-color: #eee;
}
</style>
</head>
<body>
<div class="container a ">
固定宽度
</div>
<div class="container-fluid b ">
100%宽度
</div>
<br><!-- 创建最多 12 列的响应式行(问题:当屏幕小于一定程度时,每行只会显示1列) -->
<div class="container ">
<div class="row">
<div class="col-md-1 a">1</div>
<div class="col-md-1 a">2</div>
<div class="col-md-1 a">3</div>
<div class="col-md-1 a">4</div>
<div class="col-md-1 a">5</div>
<div class="col-md-1 a">6</div>
<div class="col-md-1 a">7</div>
<div class="col-md-1 a">8</div>
<div class="col-md-1 a">9</div>
<div class="col-md-1 a">10</div>
<div class="col-md-1 a">11</div>
<div class="col-md-1 a">12</div>
</div>
<div class="row">
<div class="col-md-8 a">8</div>
<div class="col-md-4 a">4</div>
</div>
<div class="row">
<div class="col-md-4 a">4</div>
<div class="col-md-4 a">4</div>
<div class="col-md-4 a">4</div>
</div>
</div>
<br><!-- 四种屏幕分类全部激活,大屏幕是每行显示4列,中等屏幕每行显示3列,小屏幕和超小屏幕每行显示2列 -->
<div class="container">
<div class="row">
<div class="col-lg-3 col-md-4 col-sm-6 col-xs-6 a">4</div>
<div class="col-lg-3 col-md-4 col-sm-6 col-xs-6 a">4</div>
<div class="col-lg-3 col-md-4 col-sm-6 col-xs-6 a">4</div>
<div class="col-lg-3 col-md-4 col-sm-6 col-xs-6 a">4</div>
<div class="col-lg-3 col-md-4 col-sm-6 col-xs-6 a">4</div>
<div class="col-lg-3 col-md-4 col-sm-6 col-xs-6 a">4</div>
<div class="col-lg-3 col-md-4 col-sm-6 col-xs-6 a">4</div>
<div class="col-lg-3 col-md-4 col-sm-6 col-xs-6 a">4</div>
<div class="col-lg-3 col-md-4 col-sm-6 col-xs-6 a">4</div>
<div class="col-lg-3 col-md-4 col-sm-6 col-xs-6 a">4</div>
<div class="col-lg-3 col-md-4 col-sm-6 col-xs-6 a">4</div>
<div class="col-lg-3 col-md-4 col-sm-6 col-xs-6 a">4</div>
</div>
</div>
<br><!-- 列偏移,中间保持空隙 -->
<div class="container">
<div class="row">
<div class="col-md-8 a">8</div>
<div class="col-md-3 col-md-offset-1 a">3</div>
</div>
</div>
<br><!-- 嵌套,嵌满也是 12 列 -->
<div class="container">
<div class="row">
<div class="col-md-9 a">
<div class="col-md-8 a">1-8</div>
<div class="col-md-4 a">9-12</div>
</div>
<div class="col-md-3 a">11-12</div>
</div>
</div>
<br><!-- 交换列的位置 -->
<div class="container">
<div class="row">
<div class="col-md-9 a">9</div> <!-- 向右移动3列 -->
<div class="col-md-3 a">3</div> <!-- 向左移动9列 -->
</div>
<div class="row">
<div class="col-md-9 col-md-push-3 a">9</div> <!-- 向右移动3列,push 向右移动 -->
<div class="col-md-3 col-md-pull-9 a">3</div> <!-- 向左移动9列,pull 向左移动 -->
</div>
</div>
</body>
</html>
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