CSS学习33-常见布局技巧


CSS 常见布局技巧

1. margin 负值运用

  1. 让每个盒子margin 往左侧移动 -1px，正好压住相邻盒子的边框

    示例代码

    <!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>margin负值的巧妙运用</title>
    <style>
        ul li {
            float: left;
            list-style: none;
            width: 150px;
            height: 200px;
            border: 1px solid red;
            margin-left: -1px;
        }
    </style>
</head>

<body>
    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
    </ul>
</body>

</html>

    运行结果

    image

  2. 鼠标经过某个盒子的时候，提高当前盒子的层级即可 ( 如果没有定位，则添加相对定位( 保留位置 ) ，如果有定位，则加 z-index )

    示例代码

    <!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>margin负值的巧妙运用</title>
    <style>
        ul li {
            position: relative;
            list-style: none;
            float: left;
            width: 150px;
            height: 200px;
            border: 1px solid red;
            margin-left: -1px;
        }

        /* ul li:hover {
            1. 如果盒子没有定位，则鼠标经过添加相对定位即可
            position: relative;
            border: 1px solid blue;
        } */
        ul li:hover {
            /* 2. 如果li都有定位，则鼠利用 z-index 提高层级 */
            z-index: 1;
            border: 1px solid blue;
        }
    </style>
</head>

<body>
    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
    </ul>
</body>

</html>

    运行结果

    sample


2. 文字围绕浮动元素

巧妙运用浮动元素不会压住文字的特性

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>文字围绕浮动元素的妙用</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .box {
            width: 300px;
            height: 70px;
            background-color: pink;
            margin: 0 auto;
            padding: 5px;
        }

        .pic {
            float: left;
            width: 120px;
            height: 60px;
            margin-right: 5px;
        }

        .pic img {
            width: 100%;
        }
    </style>
</head>

<body>
    <div class="box">
        <div class="pic">
            <img src="images/img.png" alt="">
        </div>
        <p> 【集锦】热身赛-巴西0-1秘鲁 内马尔替补两人血染赛场</p>
    </div>
</body>

</html>

运行结果

image


3. 行内块的巧妙运用

示例代码

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>行内块的巧妙运用</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .box {
            text-align: center;
        }

        .box a {
            display: inline-block;
            width: 36px;
            height: 36px;
            background-color: #f7f7f7;
            border: 1px solid #ccc;
            text-align: center;
            line-height: 36px;
            text-decoration: none;
            color: #333;
            font-size: 14px;
        }

        .box .prev,
        .box .next {
            width: 85px;

        }

        .box .current,
        .box .elp {
            background-color: #fff;
            border: none;
        }

        .box input {
            height: 36px;
            width: 45px;
            border: 1px solid #ccc;
            outline: none;
        }

        .box button {
            width: 60px;
            height: 36px;
            background-color: #f7f7f7;
            border: 1px solid #ccc;
        }
    </style>
</head>

<body>
    <div class="box">
        <a href="#" class="prev">&lt;&lt;上一页</a>
        <a href="#" class="current">2</a>
        <a href="#">3</a>
        <a href="#">4</a>
        <a href="#">5</a>
        <a href="#">6</a>
        <a href="#" class="elp">...</a>
        <a href="#" class="next">&gt;&gt;下一页</a>
        到第
        <input type="text">
        页
        <button>确定</button>
    </div>
</body>

</html>

运行结果

image


4. CSS 三角强化

示例代码

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS三角强化的巧妙运用</title>
    <style>
        .box1 {
            width: 0;
            height: 0;
            /* 把上边框宽度调大 */
            /* border-top: 100px solid transparent;
            border-right: 50px solid skyblue; */
            /* 左边和下边的边框宽度设置为0 */
            /* border-bottom: 0 solid blue;
            border-left: 0 solid green; */

            /* 简写形式 */
            /* 1. 只保留右边的边框有颜色 */
            border-color: transparent red transparent transparent;
            /* 2. 样式都是solid */
            border-style: solid;
            /* 3. 上边框宽度要大，右边框给宽度稍小，其余的边框为0 */
            border-width: 100px 50px 0 0;
        }

        .price {
            width: 160px;
            height: 24px;
            border: 1px solid red;
            margin: 0 auto;
            line-height: 24px;
        }

        .miaosha {
            position: relative;
            float: left;
            width: 90px;
            height: 100%;
            background-color: red;
            text-align: center;
            color: #fff;
            font-weight: 700;
            margin-right: 8px;
        }

        .miaosha i {
            position: absolute;
            right: 0;
            top: 0;
            width: 0;
            height: 0;
            border-color: transparent #fff transparent transparent;
            border-style: solid;
            border-width: 24px 12px 0 0;
        }

        .origin {
            font-size: 12px;
            color: gray;
            text-decoration: line-through;
        }
    </style>
</head>

<body>
    <div class="box1"></div>
    <div class="price">
        <span class="miaosha">
            ￥1650
            <i></i>
        </span>
        <span class="origin">￥5650</span>
    </div>
</body>

</html>

运行结果

image


posted @ 2021-06-08 17:14  Brianxq  阅读(101)  评论(0)    收藏  举报