第5節(jié) 網(wǎng)格垂直和水平對(duì)齊
Bootstrap網(wǎng)格垂直和水平對(duì)齊方式
1、Bootstrap網(wǎng)格布局
上一節(jié)我們介紹了Bootstrap中的網(wǎng)格，網(wǎng)格在網(wǎng)頁(yè)布局中是一個(gè)重點(diǎn)和難點(diǎn)，布局是網(wǎng)頁(yè)設(shè)計(jì)的起點(diǎn)和基礎(chǔ)，一定要花功夫弄懂，最起碼把我寫的教程介紹的內(nèi)容弄懂，因?yàn)槲覍懙亩际亲畛Ｓ玫暮妥罨A(chǔ)的。當(dāng)然對(duì)于一個(gè)有一定基礎(chǔ)的網(wǎng)頁(yè)設(shè)計(jì)師，這些內(nèi)容相信一看就懂，今天我們進(jìn)一步學(xué)習(xí)網(wǎng)格布局。
本節(jié)內(nèi)容涉及到通用類的彈性盒子（Flex）中的部分功能。
2、垂直對(duì)齊
2.1 row標(biāo)簽中設(shè)置垂直對(duì)齊
通過在row標(biāo)簽中 添加align-items-start、align-items-center、align-items-end可以更改行在容器中的垂直對(duì)齊方式，以上三個(gè)標(biāo)簽分別為頂部對(duì)齊、居中對(duì)齊、底部對(duì)齊。以下是一段演示代碼和效果圖，代碼中css代碼設(shè)置背景色和間距，方便查看效果。
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="keywords" content="">
<meta name="description" content="">
<link href="bootstrap5/bootstrap.min.css" rel="stylesheet">
<style>
.row{background-color: rgba(0, 0, 255, 0.178);height: 260px;margin:30px;}
.col{background-color: rgba(101, 101, 161, 0.842);height: 80px;padding: 30px;margin: 10px;}
</style>
<title>垂直對(duì)齊演示</title>
</head>
<body>
<div>
<div class="row align-items-start">
<div> </div>
<div></div>
<div></div>
</div>
<div class="row align-items-center">
<div> </div>
<div></div>
<div></div>
</div>
<div class="row align-items-end">
<div> </div>
<div></div>
<div></div>
</div>
</div>
<script src="bootstrap5/bootstrap.bundle.min.js" ></script>
</body>
</html>2.2 col標(biāo)簽中設(shè)置垂直對(duì)齊
通過在col標(biāo)簽中 添加align-self-start、align-self-center、align-self-end可以更改列在行中的垂直對(duì)齊方式，以上三個(gè)標(biāo)簽分別為頂部對(duì)齊、居中對(duì)齊、底部對(duì)齊。以下是一段演示代碼和效果圖，代碼中css代碼設(shè)置背景色和間距，方便查看效果。
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="keywords" content="">
<meta name="description" content="">
<link href="bootstrap5/bootstrap.min.css" rel="stylesheet">
<style>
.row{background-color: rgba(0, 0, 255, 0.178);height: 260px;margin:30px;}
.col{background-color: rgba(101, 101, 161, 0.842);height: 80px;padding: 30px;margin: 10px;}
</style>
<title>垂直對(duì)齊演示</title>
</head>
<body>
<div>
<div class="row align-items-start">
<div class="col align-self-start"> </div>
<div class="col align-self-center"></div>
<div class="col align-self-end"></div>
</div>
</div>
<script src="bootstrap5/bootstrap.bundle.min.js" ></script>
</body>
</html>3、水平對(duì)齊
3.1 row標(biāo)簽中設(shè)置垂直對(duì)齊
通過在row標(biāo)簽中 添加justify-content-start、justify-content-center、justify-content-end、justify-content-around、justify-content-between、justify-content-evenly可以更改列在行中的水平對(duì)齊方式。以下是一段演示代碼和效果圖，代碼中css代碼設(shè)置背景色和間距，方便查看效果。
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="keywords" content="">
<meta name="description" content="">
<link href="bootstrap5/bootstrap.min.css" rel="stylesheet">
<style>
.row{background-color: rgba(0, 0, 255, 0.178);height: 120px;margin:10px;}
.col-4{background-color: rgba(101, 101, 161, 0.842);height: 30px;padding: 10px;margin: 10px;}
</style>
<title>垂直對(duì)齊演示</title>
</head>
<body>
<div>
<div class="row justify-content-start">
<div> </div>
<div></div>
<div></div>
</div>
<div class="row justify-content-center">
<div> </div>
<div></div>
<div></div>
</div>
<div class="row justify-content-end">
<div> </div>
## <div></div>
<div></div>
</div>
<div class="row justify-content-around">
<div> </div>
<div></div>
<div></div>
</div>
<div class="row justify-content-between">
<div> </div>
<div></div>
<div></div>
</div>
<div class="row justify-content-evenly">
<div> </div>
<div></div>
<div></div>
</div>
</div>