移动Web——平面转换-多重转换

1、平面转换-多重转换

多重转换技巧：先平移再旋转

<!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>多重转换</title>
    <style>
      .box {
        width: 800px;
        height: 200px;
        border: 1px solid #000;
      }

      img {
        width: 200px;
        transition: all 5s;
      }

      /* 鼠标移入box，图片边走边转 */
      .box:hover img {
        /* 先平移再旋转 */
        transform: translate(600px) rotate(360deg);

        /* 旋转会改变坐标轴向 */
        /* 多重转换：以第一种转换形态的坐标轴为准 */
        /* transform: rotate(360deg) translate(600px); */

        /* 层叠性 */
        /* transform: translate(600px);
        transform: rotate(360deg); */
      }
    </style>
  </head>

  <body>
    <div class="box">
      <img src="./images/tyre1.png" alt="" />
    </div>
  </body>
</html>

2、平面转换-缩放

属性

技巧：

• 通常，只为scale()设置一个值，表示X轴和Y轴等比例缩放
• 取值大于1表示放大，取值小于1表示缩小

<!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>缩放效果</title>
    <style>
      .box {
        width: 300px;
        height: 210px;
        margin: 100px auto;
        background-color: pink;
      }

      .box img {
        width: 100%;
        transition: all 0.5s;
      }

      .box:hover img {
        /* 修改宽高尺寸，从左上角开始缩放 */
        /* width: 500px;
        height: 400px; */

        /* 大于1，表示放大 */
        transform: scale(2);

        /* 小于1，表示缩小 */
        transform: scale(0.5);

        /* 等于1，不变 */
        transform: scale(1);
      }
    </style>
  </head>

  <body>
    <div class="box">
      <img src="./images/product.jpeg" alt="" />
    </div>
  </body>
</html>

3、案例 播放特效

<!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>按钮缩放</title>
    <style>
      * {
        margin: 0;
        padding: 0;
      }

      li {
        list-style: none;
      }

      img {
        width: 100%;
      }

      .box {
        width: 249px;
        height: 210px;
        margin: 50px auto;     
      }

      .box p {
        color: #3b3b3b;
        padding: 10px 10px 0 10px;
      }

      /* 1. 摆放播放按钮：图片区域的中间 */
      .box li {
        overflow: hidden;
      }
      
      .pic {
        position: relative;
      }

      .pic::after {
        position: absolute;
        left: 50%;
        top: 50%;
        /* margin-left: -29px;
        margin-top: -29px; */
        /* transform: translate(-50%, -50%); */

        content: '';
        width: 58px;
        height: 58px;
        background-image: url(./images/play.png);
        transform: translate(-50%, -50%) scale(5);
        opacity: 0;

        transition: all .5s;
      }
      /* 2. hover效果：大按钮，看不见：透明是0 → 小按钮，看得见：透明度1 */
      .box li:hover .pic::after {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
      }
    </style>
  </head>
  <body>
    <div class="box">
      <ul>
        <li>
          <div class="pic">
            <img src="./images/party.jpeg" alt="" />
          </div>
          <p>【和平精英】"初火"音乐概念片：四圣觉醒......</p>
        </li>
      </ul>
    </div>
  </body>
</html>

4、 平面转换-倾斜

取值：

• 角度度数deg

<!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>倾斜效果</title>
    <style>
      div {
        margin: 100px auto;
        width: 100px;
        height: 200px;
        background-color: pink;
        transition: all 0.5s;
      }

      div:hover {
        transform: skew(30deg);
        transform: skew(-30deg);
      }
    </style>
  </head>
  <body>
    <div></div>
  </body>
</html>