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我有我需要裁剪的图像的cropWidth、cropHeight 和起始坐标。<amp-img>我应该如何使用这些信息进行裁剪？

例如，如果图像的尺寸为 10 X 10，假设cropwidth 为 2，cropheight 为 3，起始位置为 3,5。这意味着我想要矩形所描述的图像部分，其中 (3,5) 作为左上角，(5,8) 作为右上角。

以下是我尝试过的，但无法正常工作：

HTML 代码

<div style="width:400px;height:200px;position: relative;">
        <amp-img class="cropped2" width="2px" height="1px" layout="responsive" src="https://hips.hearstapps.com/ghk.h-cdn.co/assets/17/30/2560x1280/landscape-1500925839-golden-retriever-puppy.jpg?resize=480:*">
        </amp-img>
</div>

CSS 代码：

.cropped2 {
         width: 100px; /* width of container */
            height: 100px; /* height of container */
            object-fit: cover;
            object-position: 20% 10px; 
            border: 5px solid black;
    }

有人能说出为什么这不起作用并给出一个可行的解决方案吗？

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1 回答 1

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下一次，尝试插入工作代码以便它可以运行。看看我的例子。

喜欢您的代码：我不确定使用layout= "responsive"and的选项object-fit: cover是否是个好主意。看看我的例子，希望对你有帮助。

<!doctype html>
<html amp lang="en">

<head>
  <meta charset="utf-8">
  <script async src="https://cdn.ampproject.org/v0.js"></script>
  <title>Hello, AMPs</title>
  <link rel="canonical" href="https://amp.dev/documentation/guides-and-tutorials/start/create/basic_markup/">
  <meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">
  <script type="application/ld+json">
    {
      "@context": "http://schema.org",
      "@type": "NewsArticle",
      "headline": "Open-source framework for publishing content",
      "datePublished": "2015-10-07T12:02:41Z",
      "image": [
        "logo.jpg"
      ]
    }
  </script>
  <style amp-boilerplate>
    body {
      -webkit-animation: -amp-start 8s steps(1, end) 0s 1 normal both;
      -moz-animation: -amp-start 8s steps(1, end) 0s 1 normal both;
      -ms-animation: -amp-start 8s steps(1, end) 0s 1 normal both;
      animation: -amp-start 8s steps(1, end) 0s 1 normal both
    }

    @-webkit-keyframes -amp-start {
      from {
        visibility: hidden
      }

      to {
        visibility: visible
      }
    }

    @-moz-keyframes -amp-start {
      from {
        visibility: hidden
      }

      to {
        visibility: visible
      }
    }

    @-ms-keyframes -amp-start {
      from {
        visibility: hidden
      }

      to {
        visibility: visible
      }
    }

    @-o-keyframes -amp-start {
      from {
        visibility: hidden
      }

      to {
        visibility: visible
      }
    }

    @keyframes -amp-start {
      from {
        visibility: hidden
      }

      to {
        visibility: visible
      }
    }
  </style><noscript>
    <style amp-boilerplate>
      body {
        -webkit-animation: none;
        -moz-animation: none;
        -ms-animation: none;
        animation: none
      }
    </style>
  </noscript>

  <style amp-custom>
    .wrapper {
      margin: 15px;
      position: relative;
    }

    .wrapper_one {
      height: 100px;
      width: 100px;
    }

    .wrapper_two {
      height: 150px;
      width: 300px;
    }

    .cropped2 img {
      object-position: 20% 10px;
      border: 5px solid black;
      object-fit: cover;
    }
  </style>
</head>

<body>

  <h1>Welcome to the mobile web</h1>

  <div class="wrapper wrapper_one">
    <amp-img class="cropped2" layout="fill" src="https://hips.hearstapps.com/ghk.h-cdn.co/assets/17/30/2560x1280/landscape-1500925839-golden-retriever-puppy.jpg?resize=480:*">
    </amp-img>
  </div>

  <div class="wrapper wrapper_two">
    <amp-img class="cropped2" layout="fill" src="https://hips.hearstapps.com/ghk.h-cdn.co/assets/17/30/2560x1280/landscape-1500925839-golden-retriever-puppy.jpg?resize=480:*">
    </amp-img>
  </div>

</body>

</html>

于 2020-07-07T19:58:09.920 回答