SVG笔划未显示在clipPath

Question

我有以下Codepen，在这里我要为图像周围的圆形笔触设置动画。

到目前为止，我有一个圆形的SVG，它正在裁剪图像，但没有在clipPath内部显示笔划。

如何显示边框？

class App extends React.Component {
  render() {
    return (
      <svg width='48' height='48'>
        <defs>
          <clipPath id='circleView'>
            <circle cx='24' cy='24' r='23' fill='none' stroke='red' strokeWidth='2' />
          </clipPath>
        </defs>
        <image width='48' height='48' xlinkHref={'https://source.unsplash.com/random'} clipPath='url(#circleView)' />
      </svg>
    )
  }
}

Answer 1

正如罗伯特所说，clip-path行中的子SVG数字不会显示。

因此，对于动画，您需要在clip-path

之外添加另一个圆

<circle cx="25" cy="24" r="14" fill="none" stroke="red" strokeWidth="2" />

.container {
    width:25%;
	height:25%;
   }

<div class="container">
	  <svg  viewBox="0 0 48 48" >
        <defs>
          <clipPath id='circleView'>
            <circle cx='24' cy='22' r='16' fill='none' stroke='red' stroke-width='2' />
          </clipPath>
        </defs>
        <image width="100%" height="100%"   xlink:href='https://i.stack.imgur.com/O9eO8.jpg' 
     		clip-path='url(#circleView)' />
  <circle cx='24' cy='22' r='16' fill='none' stroke='red' strokeWidth='2' /> 
</svg>
  </div>

要设置圆形动画，请使用stroke-dashoffset属性中的更改，从最大值更改为零。 values="(100.48;0)"

点击后动画开始

.container {
    width:25%;
	height:25%;
   }

<div class="container">
	  <svg id="svg1" viewBox="0 0 48 48">
        <defs>
          <clipPath id='circleView'>
     <circle cx='24' cy='22' r='16' fill='none' stroke='red' stroke-width='2' />
          </clipPath>
        </defs>
        <image width="100%" height="100%" xlink:href='https://i.stack.imgur.com/O9eO8.jpg' clip-path='url(#circleView)' />
	<circle  transform="rotate(-90 24 22)" cx="24" cy="22" r="16" fill='none' stroke='red' strokeWidth='2' 
    		stroke-dasharray="100.48"   stroke-dashoffset="100.48" >
            <animate
              attributeName="stroke-dashoffset"
              dur="1s"
              begin="svg1.click"
              values="100.48;0"
              fill="freeze"/>
	</circle>		
      </svg>

  </div>

带有CSS的动画的变化形式

我在圆形动画中添加了透明度动画。

当您将鼠标悬停在鼠标上时，动画就会开始。

.container {
    width:25%;
	height:25%;
   }  
   #crc1 {
   fill:skyblue;
   stroke-width:1;
   stroke:red;
   stroke-dasharray:100.48;
   stroke-dashoffset:100.48;
    fill-opacity:0.9;
     }
   
   #crc1:hover {
    animation: dash 1.5s ease-out forwards;
      }
	  
    @keyframes dash {
  0% { stroke-dashoffset: 100.48; fill-opacity:0.9; }
  50% { fill-opacity:0.45;}
  100% { stroke-dashoffset: 0; fill-opacity:0; }
   }
   
   #img1 {
   clip-path: url(#circleView);
     }

<div class="container">
	  <svg id="svg1" viewBox="0 0 48 48">
        <defs>
          <clipPath id='circleView'>
            <circle cx='24' cy='22' r='16'/>
          </clipPath>
        </defs>
        <image width="100%" height="100%" xlink:href='https://i.stack.imgur.com/O9eO8.jpg' 
     		clip-path='url(#circleView)' />
         <circle id="crc1"   cx="24" cy="22" r="16" />
        		
      </svg>

  </div>