如何在SVG剪辑路径中使图像居中对齐？

Question

我有一张使用SVG clipPath剪裁的图片。然而，我希望该图片在clipPath内水平和垂直居中对齐。

有没有办法实现这个效果？

<!-- SVG Reference -->
<svg height="0" width="0">
  <defs>
    <clipPath id="svgPath2">
      <path fill="#00B6B5" d="M262.229,81.068l-29.486-66.662
                              c-1.598-3.248-4.91-5.309-8.537-5.309H17.394c-6.408,0-10.596,6.703-7.773,12.441l26.736,61.072
                              c1.697,3.449,1.676,7.494-0.059,10.926L9.827,152.482c-2.902,5.742,1.283,12.521,7.732,12.521h206.715
                              c3.592,0,6.879-2.018,8.494-5.217l29.387-64.717C264.378,90.671,264.405,85.49,262.229,81.068z"/>
    </clipPath>
  </defs>
</svg>
<!-- SVG Reference -->

<div class="arrow-cards">
  <img src="http://static2.businessinsider.com/image/4f3433986bb3f7b67a00003c/a-parasite-found-in-cats-could-be-manipulating-our-brains.jpg" style="clip-path: url(#svgPath2); -webkit-clip-path: url(#svgPath2);">
</div>

http://codepen.io/aguerrero/pen/LGqMVq

- catandmouse

Answer 1

您的剪裁路径使用绝对坐标，因此基本上固定在页面上。您可以将img尺寸设置为箭头形状的大小（约258x156）。但这会拉伸图像变形。

或者，您可以通过仅设置图像宽度为258来保持图像的正确纵横比。然后使用相对定位将其向上移动以实现居中。

body, svg {
  margin: 0;
  padding: 0;
}

img {
  clip-path: url(#svgPath2);
  -webkit-clip-path: url(#svgPath2);
  position: relative;
  top: -20px;
}

<!-- SVG Reference -->
<svg height="0px" width="0px">
  <defs>
    <clipPath id="svgPath2">
      <path fill="#00B6B5" d="M262.229,81.068l-29.486-66.662
                              c-1.598-3.248-4.91-5.309-8.537-5.309H17.394c-6.408,0-10.596,6.703-7.773,12.441l26.736,61.072
                              c1.697,3.449,1.676,7.494-0.059,10.926L9.827,152.482c-2.902,5.742,1.283,12.521,7.732,12.521h206.715
                              c3.592,0,6.879-2.018,8.494-5.217l29.387-64.717C264.378,90.671,264.405,85.49,262.229,81.068z"/>
    </clipPath>
  </defs>
</svg>
<!-- SVG Reference -->

<div class="arrow-cards">
  <img src="http://static2.businessinsider.com/image/4f3433986bb3f7b67a00003c/a-parasite-found-in-cats-could-be-manipulating-our-brains.jpg" width="258">
</div>

或者更简单的方法是将包含箭头形状的 div 设置为相应大小，并对其应用剪辑。可以使用 background-size: cover 将图像居中。

body, svg {
  margin: 0;
  padding: 0;
}

.arrow-cards {
  width: 265px;
  height: 165px;
  background-image: url(http://static2.businessinsider.com/image/4f3433986bb3f7b67a00003c/a-parasite-found-in-cats-could-be-manipulating-our-brains.jpg);
  background-size: cover;
  clip-path: url(#svgPath2);
  -webkit-clip-path: url(#svgPath2);
}

<div class="arrow-cards"></div>

<!-- SVG Reference -->
<svg height="0px" width="0px">
  <defs>
    <clipPath id="svgPath2">
      <path fill="#00B6B5" d="M262.229,81.068l-29.486-66.662
                              c-1.598-3.248-4.91-5.309-8.537-5.309H17.394c-6.408,0-10.596,6.703-7.773,12.441l26.736,61.072
                              c1.697,3.449,1.676,7.494-0.059,10.926L9.827,152.482c-2.902,5.742,1.283,12.521,7.732,12.521h206.715
                              c3.592,0,6.879-2.018,8.494-5.217l29.387-64.717C264.378,90.671,264.405,85.49,262.229,81.068z"/>
    </clipPath>
  </defs>
</svg>
<!-- SVG Reference -->

如果您打算在页面的不同位置使用箭头形状，您可能需要考虑使用clipPathUnits="objectBoundingBox"来定义剪辑路径。这样，它可以应用于页面上的任何元素，并会自动调整以适应元素的形状。

- Paul LeBeau