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Home > List of blog posts > html元素与css样式的学习第五课（盒模型/对齐/定位）-2018年8月17日15点40分
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html元素与css样式的学习第五课（盒模型/对齐/定位）-2018年8月17日15点40分
victor的博客
Original
701 people have browsed it

代码：

实例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>盒模型/对齐/定位</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">

    <style>

        body{width: 800px;margin: 0 auto;}

        div.box{width: 200px;height: 200px;border: 5px solid #3526b5;padding: 0;margin: 20px auto;line-height: 20px;text-align: center;}

        p{margin: 20px auto;padding: 5px;}

        .section2 div{height: 200px;line-height: 200px;width: 200px;background-color: #3cf712;text-align: center;}

        .section3{text-align: center;height: 100px;line-height: 100px;background-color: #11a5f0;}

        .section4{text-align: center;height: 300px;width: 300px;display: table-cell;vertical-align: middle;background-color: #f046dc;}

        .section5{text-align: center;margin: 0 auto;height: 500px;width: 500px;display: table-cell;background-color: #f8e534;vertical-align: middle;}

        .section6{width: 500px;height: 500px;display: flex;align-items: center;justify-content: center;
            background-color: #000b00;color: white;}

        .section7{margin-top: 50px;position: relative;width: 800px;height: 800px;background-color: rgba(1,1,1,.2);}
        .section7 .container{position: absolute;width: 100px;height: 100px;transition: 1s all;}
        .section7 .container:hover{transform: rotate(360deg);}
        .section7 .container:nth-child(1){background-color: #0bb59b;left: 100px;top:0;}
        .section7 .container:nth-child(2){background-color: black;left: 0;top:100px;}
        .section7 .container:nth-child(3){background-color: pink;left: 100px;top:100px;}
        .section7 .container:nth-child(4){background-color: #ffb21a;left: 200px;top:100px;}
        .section7 .container:nth-child(5){background-color: #80e9e1;left: 100px;top:200px;}
    </style>
</head>
<body>

<section>
    <div class="box">这是一个盒子;宽高200px;行边距5px;内边距0px;外边距左右自动上下20px</div>

    <p>padding,margin 对应的值一般是上右下左，eg 10px 20px 30px 40px；可以简写，变成20px 10px，代表 上下20px 左右10px；或者20px 10px 30px，意思上20px，左右10px，下10px</p>

</section>

<br>

<section class="section2">
    <div>第一个对齐</div>
</section>

<br>

<section class="section3">
    <span>第二个对齐</span>
</section>

<br>

<section class="section4">
    <span>第三个对齐</span>
    <br>
    <span>第三个对齐</span>
    <br>
    <span>第三个对齐</span>
</section>

<br>

<section class="section5">
    <div>第四个对齐</div>
</section>

<br>

<section class="section6">
    <div>第五个对齐</div>
</section>

<section class="section7">
    <div class="container"></div>
    <div class="container"></div>
    <div class="container"></div>
    <div class="container"></div>
    <div class="container"></div>
</section>

</body>
</html>

运行实例 »

点击 "运行实例" 按钮查看在线实例

效果图：

盒模型_对齐_定位.png


总结：

课程主要讲了写布局的内容，关于文本流的对齐，盒模型的编写，还有定位。对我比较有帮助的是对齐方式的总结，其实主要就是两种方式，就是高度和行高一致，还有就是利用display:table-cell;vertical-align:middle; 去实现垂直居中。

其实还有一种利用display:flex进行对齐，display: flex;align-items: center;justify-content: center 真的很好用 ～

Correction status：qualified

Teacher's comments：缺少手写代码！
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