PHP教学-浮动定位与布局 - 第九期学习

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实例

table{
    border: 1px red solid;
    color: #3a87ad;
    box-sizing: border-box;
    box-shadow: 1px 1px 1px #999999;
    border-collapse: collapse;
    text-align: center;
    width: 700px;
    margin: 20px auto;
}

td,th{
    border: 1px solid  red;
    padding: 10px;
}

table>caption{
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: black;
}

/*隔行变色*/
tbody tr:nth-of-type(2n+1){
    background-color: #ececec;
}

tbody>tr:first-of-type>td:first-of-type{
    background: linear-gradient(red,yellow);
}
tbody>tr:nth-last-of-type(2)>td:first-of-type{
    background: linear-gradient(yellow,red);
}

thead>tr:first-of-type>th{
    background: linear-gradient(lightgrey,lightsalmon);
}
tfoot>tr>td{
    background: linear-gradient(lightseagreen,lightcyan);
}

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* 使用<div><span><p><ul>...等标签来制作一张课程表

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>第二个表格</title>
<link rel="stylesheet" href="static/css/style2.css">
</head>
<body>
<article class="table">
<h2 class="caption">第九期课程安排</h2>
<section class="thead">
<ul>
<li>序号</li>
<li>课程</li>
<li>描述</li>
</ul>
</section>

<section class="tbody">
<ul>
<li>1</li>
<li>前端开发基础</li>
<li>HTML5常用标签,CSS3样式控制与页面布局</li>
</ul>
<ul>
<li class="ThisMyClass"></li>
<li>PHP开发基础</li>
<li>PHP语法,类与对象,常用开发技术与案例</li>
</ul>
<ul class="THisClassUl">
<li class="ThisMyClass abTop">2</li>
<li>大型CMS开发实战</li>
<li>Laravel开发基础,Laravel开发CMS全程精讲</li>
</ul>
</section>

<section class="tfoot">
<ul>
<li>备注</li>
<li>全程直播教学</li>
<li>每晚20：00-22：00（节假日除外）</li>
</ul>
</section>
</article>
</body>
</html>

实例

.table{
    display: table;
    box-sizing: border-box;
    border-collapse: collapse;
    border: 1px solid #444;
    width: 650px;
    margin: auto;
    color: #444;
}

.caption{
    display: table-caption;
    text-align: center;
}

.thead{
    display: table-header-group;
    /*text-align: center;*/
    font-weight: bold;
    font-size: 1.2rem;
    /*letter-spacing: 5px;*/
    background: linear-gradient(green,white);
    color: white;
    text-shadow: 1px 1px 1px black;
}

.tbody{
    display: table-row-group;
    text-align: center;
}
section ul{
    display: table-row;
    text-align: center;
}
section ul li{
    display: table-cell;
    border: 1px solid #444;
    padding: 10px;
}

.tfoot{
    display: table-footer-group;
    background-color: #ededed;
}
.ThisMyClass{
    border:none;
}
.THisClassUl{
    /*position:relative*/
    position: relative;
}
.abTop{
    /*position: absolute;*/
    position: absolute;
    margin-top: -25px;
    margin-left: 18px;
}

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* 使用绝对定位,实现用户登录框在页面中始终居中显示

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>表单伪类选择器</title>
<link rel="stylesheet" href="static/css/style3.css">
<style>
input:enabled{
background-color:beige;
}

input:disabled{
background-color: lightgreen;
}

input:required{
background-color: red;
}

</style>
</head>
<body>
<div>
<h2>用户登录</h2>
<form action="" method="post">
<p>
<label for="email">邮箱:</label>
<input type="email" id="email" name="email" placeholder="example@email.com">
</p>

<p>
<label for="password">密码:</label>
<input type="password" id="password" name="password" required placeholder="不得少于6位">
</p>

<p>
<label for="save" >保存密码:</label>
<input type="checkbox" id="save" name="save" checked readonly>
</p>

<p>
<label for="save_time">保存期限:</label>
<select name="save_time" id="save_time">
<option value="7" selected>7天</option>
<option value="30">30天</option>
</select>
</p>

<p>
<input type="hidden" name="login_time" value="登陆时间戳">
</p>

<p>
<label for="warning">警告:</label>
<input type="text" id="warning" value="一天内仅允许登录三次" style="border:none" disabled>
</p>

<script>
document.querySelector('[type="hidden"]').value = new Date().getTime()
</script>
</form>
</div>
</body>
</html>

实例

body{
    position: relative;
}

div{
    position: absolute;
    left: 50%;
    margin-left: -150px; width:300px;
}



h2{
    text-align: center;

}

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* 模仿课堂案例, 实现圣杯布局,并写出完整流程与布局思路

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>圣杯布局</title>
<link rel="stylesheet" href="static/css/style4.css">
</head>
<body>
<div class="top">头部</div>
<div class="box2">
<div class="neirong">内容区</div>
<div class="zuo">左侧</div>
<div class="you">右侧</div>
</div>
<div class="dibu">底部</div>
</body>
</html>

实例

body{
    width: 1000px;
    margin: auto;
}

.top,.dibu{
    background-color: lightcyan;

    height: 50px;
}

.box2{
    border: 1px solid lightcoral;
    padding-left: 200px;
    padding-right: 200px;
    box-sizing: border-box;
    overflow: hidden;
}

.neirong{
    float: left ;
    box-sizing: border-box;
    width: 100%;
    min-height: 600px;
    background-color: lightseagreen;

}

.zuo{
    box-sizing: border-box;
    min-height: 600px;
    width: 200px;
    background-color: lightgreen;
    float: left;
    margin-left: -100%;
    position: relative;
    left:-200px;
}

.you{
    float: left;
    box-sizing: border-box;
    min-height: 600px;
    width: 200px;
    background-color: lightgoldenrodyellow;
    margin-left:-200px;
    position: relative;
    left: 200px;
}

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* (选做): 将圣杯布局中的左右二列,使用绝对定位来实现

/*body{*/
/* width: 1000px;*/
/* margin: auto;*/
/*}*/

.top,.dibu{
background-color: lightcyan;

height: 50px;
}

.box2{
border: 2px solid lightcoral;
padding-left: 200px;
padding-right: 200px;
box-sizing: border-box;
overflow: hidden;
position: relative;
}

.neirong{
float: left ;
box-sizing: border-box;
width: 100%;
min-height: 600px;
background-color: lightseagreen;

}

.zuo{
box-sizing: border-box;
min-height: 600px;
width: 200px;
background-color: lightgreen;
float: left;

position: absolute;
top: 0;
left: 0;
/*position: absolute;*/
/*left:-200px;*/
}

.you{
float: left;
box-sizing: border-box;
min-height: 600px;
width: 200px;
background-color: lightgoldenrodyellow;
position: absolute;
top: 0;
right: 0;
/*margin-left:-200px;*/
/*position: relative;*/
/*left: 200px;*/
}

Correction status：qualified

Teacher's comments：你的类名, 真是醉了, 这么简单的单词, 还是要记一些的, 左右, left, right 比拼音要好多了, 不是吗?

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2023-01-16 23:16:18