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PHP教学-flex容器、弹性布局之弹性容器1
果莫个人博客
Original
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flex容器

1.块级-弹性容器

.flex{
    display: flex;
}




2.行内-弹性容器

.inline-flex{
    display: inline-flex;
}




实例-弹性盒子做导航:



实例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>弹性容器做导航</title>
    <link rel="stylesheet" href="css/style10.css">
    <style>
        nav{
            display: flex;
        }
        a{
            background-color: lightgreen;
            color: 1px solid red;
            text-decoration: none;
            border-radius: 5px 5px 0 0;
            padding: 5px 10px;
            margin: 0px 2px;
        }

        a:hover,a:active,a:focus{
            background-color: silver;
            color: white;

        }
    </style>
</head>
<body>
<nav>
    <a href="">首页</a>
    <a href="">教学视频</a>
    <a href="">社区问答</a>
    <a href="">软件下载</a>
    <a href="">联系我们</a>

</nav>

</body>
</html>

运行实例 »

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2.png


2.jpg



flex弹性容器的属性


flex的6个属性

flex-direction
flex-wrap
flex-flow
justify-content
align-items
align-content


  1. flex-direction属性

    决定主轴上元素的排列方式

.box {  flex-direction: row ;  还有 column 、row-reverse 、column-reverse
row(默认值):主轴为水平方向,起点在左端。
row-reverse:主轴为水平方向,起点在右端。
column:主轴为垂直方向,起点在上沿。
column-reverse:主轴为垂直方向,起点在下沿。


实例

实例<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>定义弹性容器的主轴方向:弹性元素的主轴上的排列方向</title>
    <style>
        /*弹性容器的通用样式*/
        .container{
            border:2px dashed red;
            margin: 15px;
            background-color: #cdc;
        }
        /*弹性元素的通用样式*/
        .item  {
            box-sizing: border-box;
            border: 1px solid;
            padding: 20px   ;
            background-color: #ede;
        }

        /*块级弹性盒子*/
        .flex{
            display: flex;
        }



        .row{
            flex-direction: row;
        }

        .row-reverse{
            flex-direction: row-reverse;
        }

        .column{
            flex-direction: column;
        }

        .column-reverse{
            flex-direction: column-reverse;
        }
    </style>
</head>
<body>
<h3>1.row:默认从左到右水平排列</h3>
<div class="container flex row" style="width: 500px;">
    <span class="item">item1</span>
    <span class="item">item2</span>
    <span class="item">item3</span>
    <span class="item">item3</span>
    <span class="item">item3</span>
    <span class="item">item3</span>
    <span class="item">item3</span>
    <span class="item">item3</span>
    <span class="item">item3</span>

</div>
<hr>

<h3>2.row-reverse:默认从右到左水平排列</h3>
<div class="container flex row-reverse">
    <span class="item">item1</span>
    <span class="item">item2</span>
    <span class="item">item3</span>
</div>

<hr>

<h3>3.column:从上到下,垂直排列</h3>
<div class="container flex column">
    <span class="item">item1</span>
    <span class="item">item2</span>
    <span class="item">item3</span>
</div>

<hr>
<h3>4.column-reverse:从下往上,垂直排列</h3>
<div class="container flex column-reverse">
    <span class="item">item1</span>
    <span class="item">item2</span>
    <span class="item">item3</span>
</div>

</body>
</html>

运行实例 »

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3.png


5.png


实例-创建网站首页

实例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>创建网站首页</title>
    <style>
        /*链接样式重弄之   */
        a{
            text-decoration: none;
            background-color: lightgreen;
            color: black    ;
            padding: 5px 10px;
            margin: 0 5px;
            border-radius: 5px 5px 0 0;
        }

        nav{
            display: flex;
            border-bottom: 1px solid gray;
        }

        a:hover,a:focus,a:active{
            background-color: orange;
            color:  white;
            flex-direction: column-reverse;
        }




        *{
            /*outline: 1px solid #ccc;*/
            margin: 10px;
            padding: 10px;
        }

        /*将页面中所有布局元素转为flex*/
        body,nav,main,article{
            display: flex;
        }

        /*元素在主轴上的排列方向*/
        body,article{
            flex-direction: column;
            box-sizing: border-box;
        }

        footer{
            border-top: 1px solid #ccc;
        }

        nav{
            padding-bottom: 0px;
        }
    </style>
</head>
<body>
<header><h1>猪老师的博客</h1></header>
<nav>
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    <a href="">教学视频</a>
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    <a href="">软件下载</a>
    <a href="">联系我们</a>
</nav>
<main>
    <article>
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</main>
<footer>
    <p>copyright © 2018-2021 php中文网</p>
</footer>
</body>
</html>

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4.png


6.jpg



Correction status:qualified

Teacher's comments:其实昨晚的内容非常的充实, 不知这些作业写完是什么感受, 完全记住不太可能, 但是喜欢上编程应该可以了
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