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第五天

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第五天

CSS图片处理

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>图片解决方案</title>
    <style>
        ul{
            list-style:none;
        }
        a{
            text-decoration: none;
            color: #999;
        }
        /* 普通背景图片处理 */
        .tlist>li{
            height: 30px;
            line-height: 30px;
            background-image: url(./dot_red.gif);
            background-repeat: no-repeat;
            background-position: 0 15px;/* 调整图片上下的位置 */
            padding-left: 12px; /* 调整图片左右的位置 */
        }

        /* 雪碧图使用 */
        .miaosha{
            width: 40px;
            height: 40px;
            background: transparent url(zhekouicon_bg.gif) no-repeat -126px -343px;
            /* css sprite 的background-position一定是负值或0 */
        }
        .other{
            width: 40px;
            height: 40px;
            background: transparent url(zhekouicon_bg.gif) no-repeat -85px -343px;
        }

        .img,.img2{
            width: 300px;
            height: 300px;
            border: 1px solid #c00;
            background: url(zhekouicon_bg.gif);
        }
        .img{
            /* 属性值为一个值则为宽度，高度随着宽度等比例变化 */
            /* background-size: contain; */
            block-size: 100%;
        }

        .img2{
            background-size: cover;
            background-clip: content-box;/* 只为内容加背景图片，padding部分不加 */
            padding: 20px;
        }
    </style>
</head>
<body>
    <!-- 1.电脑端：css sprite 雪碧图，css精灵 -->
    <!-- 将多张辅助(背景)合并为一张图片 -->
    <!-- 2.移动端 -->
    <!-- 图像软件：fireworks、photoshop、画图 -->
    <!-- 做设计图，切图 -->
    <ul class="tlist">
        <li><a href="#">这里是列表的内容</a></li>
        <li><a href="#">这里是列表的内容</a></li>
        <li><a href="#">这里是列表的内容</a></li>
        <li><a href="#">这里是列表的内容</a></li>
    </ul>
    <div class="miaosha">
    </div>
    <div class="other">

    </div>

    <div class="img">

    </div>
    <div class="img2"></div>
</body>
</html>

移动端图片处理

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

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>移动端图片处理</title>
    <link rel="stylesheet" href="./iconfont/iconfont.css">
    <style>
        span.iconfont{/* 优先级问题 */
            font-size: 150px;
        }
        .iconfont:first-child{
            color: red;
        }
    </style>
</head>

<body>
    <!-- 移动端图片解决方案 -->
    <!-- 1.png、jpg -->
    <!-- 2.iconfont字体图标，使用文字作为图标，@font-face-服务器端字体 -->
    <!-- 3.svg:ai -->
    <!-- 4.base64 -->
    <span class="iconfont icon-heart"></span>
</body>

</html>

下导航实例

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

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>下导航</title>
    <link rel="stylesheet" href="./iconfont/iconfont.css">
    <style>
        ul,p,body{
            margin: 0;
            padding: 0;
        }
        ul{
            list-style: none;
        }
        .fnav{
            width: 100%;
            position: fixed;
            left: 0;
            bottom: 0;
            display: flex;
        }
        .fnav>li{
            width: 20%;
            text-align: center;
        }
        .fnav>li:nth-child(3) .iconfont{
            font-size: 40px;
            color: #666;
            line-height: 50px;
        }
        .iconfont{
            font-size: 32px;
            color: #999;
            line-height: 50px;
        }
        .fnav p{
            line-height: 30px;
            font-size: 14px;
            color: #999;
        }
    </style>
</head>

<body>
    <ul class="fnav">
        <li>
            <span class="iconfont icon-heart"></span>
            <p>精选</p>
        </li>
        <li>
            <span class="iconfont icon-hearto"></span>
            <p>新闻</p>
        </li>
        <li>
            <span class="iconfont icon-down"></span>
            <p>娱乐</p>
        </li>
        <li>
            <span class="iconfont icon-like"></span>
            <p>商城</p>
        </li>
        <li>
            <span class="iconfont icon-like1"></span>
            <p>我的</p>
        </li>

    </ul>
</body>

</html>

CSS3D动画

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>3D</title>
    <style>
        h2,p{
            padding: 0;
            margin: 0;
        }
        .view{
            width: 300px;
            height: 150px;
            overflow: hidden;
            perspective: 400px;/* 视图 */
            /* perspective-origin: bottom left; 视觉的终点 */
            
            margin: 4px;
        }
        .three{
            transform-style: preserve-3d;
            transform-origin: right center 0;/* 三个值 x,y,z */
            position: relative;
            width: 100%;
            height: 100%;
            transition: all 0.6s ease-in-out;
            /* transform-style: preserve-3d; */
        }
        img{
            width: 300px;
            height: 150px;
        }
        .front,.back{
            position: absolute;
            backface-visibility: hidden;/* 3D旋转过程中后面是否可见 */
            width: 100%;
            height: 100%;
        }
        .back{
            transform: rotateY(0.5turn);
        }
        .three:hover{
            transform: translateX(-100%) rotateY(-180deg);
        }

        .back{
            background: #c00;
        }
        .back h3{
            margin: 10px;
            font-size: 16px;
            text-align: center;
        }
        .back p{
            color: #fff;
            text-indent: 2em;
            font-size: 14px;
            line-height: 25px;
            padding: 3px;
        }

    </style>
</head>
<body>
    <div class="view">
        <div class="three">
        <div class="front">
            <img src="../Day1/3.jpg" alt="">
        </div>
        <div class="back">
            <img src="../Day1/2.png" alt="">
        </div>
    </div>
    </div>

    <div class="view">
        <div class="three">
            <div class="front">
                <img src="../Day1/2.png">
            </div>
            <div class="back">
                <h3>这里是文字</h3>
            </div>
        </div>
    </div>
</body>
</html>