SVG CSS 多个动画答案

【问题标题】：SVG CSS Multiple animationsSVG CSS 多个动画
【发布时间】：2020-01-19 23:39:57
【问题描述】：

我创建了一个藏宝图动画，首先，它将以浅灰色显示路径，但随着动画的开始，我希望浅灰色的虚线消失或变成黑色，因为填充动画“.road”开始了. 当填充动画越过该位置时，我正在努力让浅灰色破折号“.steps”消失。

svg {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
}

.road {
  stroke-dasharray: 744;
  stroke-dashoffset: -744;
  animation: draw-road 10s infinite;
}

.steps {
  stroke-dasharray: -744;
  stroke-dashoffset: 744;
  animation: draw-steps 10s reverse;
}

@keyframes draw-road {
  0% {
    stroke-dashoffset: 744;
    stroke: #000000;
  }
  100% {
    stroke-dashoffset: 0;
    stroke: #000000;
  }
}

@keyframes draw-steps {
  0% {
    stroke-dashoffset: 0;
  }
  100% {
    stroke-dashoffset: 0;
  }
}

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 300">
      <style>
        .st0{fill:none;stroke:#999;stroke-width:2;stroke-miterlimit:10}.st2{fill:#b3b3b3}
      </style>
      <g id="Layer_1">
        <path class="st0" d="M20.82 225.01c1.05-1.32 2.08-2.63 3.1-3.92"/>
        <path d="M30.16 213.14c47.85-61.32 61-85.9 56.16-90.62-7.14-6.97-60.04 22.79-57 46 2.94 22.48 115.32-.75 124 27 3.14 10.05-9.18 19.09-5 25 8.54 12.09 73.6-6.39 76-30 3.26-32.1-111.39-53.93-109-82 1.2-14.1 32-30.41 153.49-42.53" fill="none" class="road" stroke="#999" stroke-width="2" stroke-miterlimit="10" stroke-dasharray="10.1073,10.1073"/>
        <path class="st0" d="M20.82 225.01c1.05-1.32 2.08-2.63 3.1-3.92"/>
        <path d="M30.16 213.14c47.85-61.32 61-85.9 56.16-90.62-7.14-6.97-60.04 22.79-57 46 2.94 22.48 115.32-.75 124 27 3.14 10.05-9.18 19.09-5 25 8.54 12.09 73.6-6.39 76-30 3.26-32.1-111.39-53.93-109-82 1.2-14.1 32-30.41 153.49-42.53" fill="none" stroke="#999" stroke-width="2" stroke-miterlimit="10" stroke-dasharray="10.1073,10.1073" class="steps"/>
        <path class="st0" d="M273.84 65.49c1.64-.16 3.3-.32 4.98-.48"/>
        <path class="st2" d="M55.96 140.02l-3.27-4.42-4.42 3.27-1.79-2.41 4.42-3.27-3.27-4.42 2.41-1.79 3.27 4.42 4.42-3.27 1.79 2.41-4.42 3.27 3.27 4.42-2.41 1.79zM158 200.86l-4.29-3.44-3.44 4.29-2.34-1.88 3.44-4.29-4.29-3.44 1.88-2.34 4.29 3.44 3.44-4.29 2.34 1.88-3.44 4.29 4.29 3.44-1.88 2.34zM149 140.86l-4.29-3.44-3.44 4.29-2.34-1.88 3.44-4.29-4.29-3.44 1.88-2.34 4.29 3.44 3.44-4.29 2.34 1.88-3.44 4.29 4.29 3.44-1.88 2.34zM212 78.86l-4.29-3.44-3.44 4.29-2.34-1.88 3.44-4.29-4.29-3.44 1.88-2.34 4.29 3.44 3.44-4.29 2.34 1.88-3.44 4.29 4.29 3.44-1.88 2.34z"/>
      </g>
    </svg>

【问题讨论】：

将路径class="road"移到组尾。

标签： css svg

【解决方案1】：

使用 CSS 的解决方案

svg{
  position:absolute;
  top:0;
  right:0;
  bottom:0;
  left:0;
  margin:auto;
} 

.road{
  fill:none;
  stroke:black;
  stroke-dasharray:10 10;
  stroke-dashoffset:0;
  stroke-width:2;
}
.steps{
   fill:none;
   stroke:#999;
  stroke-dasharray:10 10;
  stroke-dashoffset:0;
  stroke-width:2;
  mask:url(#msk1);
      }


#stepMask{
   fill:none;
   stroke:black;
   stroke-width:2;
   stroke-dashoffset: 744;
   stroke-dasharray:744,744;
   animation: draw-steps 10s linear infinite;
}
@keyframes draw-steps {
100% {stroke-dashoffset:0;}
}

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 300">
  <style>
    .st0{fill:none;stroke:#999;stroke-width:2;stroke-miterlimit:10}.st2{fill:#b3b3b3}
  </style>
    <defs>
	   <mask id="msk1">
	      <rect width="100%" height="100%" fill="white" />
	     <path id="stepMask"  d="M30.16 213.14c47.85-61.32 61-85.9 56.16-90.62-7.14-6.97-60.04 22.79-57 46 2.94 22.48 115.32-.75 124 27 3.14 10.05-9.18 19.09-5 25 8.54 12.09 73.6-6.39 76-30 3.26-32.1-111.39-53.93-109-82 1.2-14.1 32-30.41 153.49-42.53" />
			  
	   </mask>
	</defs>
  <g id="Layer_1">
     <path class="road" d="M30.16 213.14c47.85-61.32 61-85.9 56.16-90.62-7.14-6.97-60.04 22.79-57 46 2.94 22.48 115.32-.75 124 27 3.14 10.05-9.18 19.09-5 25 8.54 12.09 73.6-6.39 76-30 3.26-32.1-111.39-53.93-109-82 1.2-14.1 32-30.41 153.49-42.53" />
     <path class="steps"  d="M30.16 213.14c47.85-61.32 61-85.9 56.16-90.62-7.14-6.97-60.04 22.79-57 46 2.94 22.48 115.32-.75 124 27 3.14 10.05-9.18 19.09-5 25 8.54 12.09 73.6-6.39 76-30 3.26-32.1-111.39-53.93-109-82 1.2-14.1 32-30.41 153.49-42.53" />
   <path class="st2" d="M55.96 140.02l-3.27-4.42-4.42 3.27-1.79-2.41 4.42-3.27-3.27-4.42 2.41-1.79 3.27 4.42 4.42-3.27 1.79 2.41-4.42 3.27 3.27 4.42-2.41 1.79zM158 200.86l-4.29-3.44-3.44 4.29-2.34-1.88 3.44-4.29-4.29-3.44 1.88-2.34 4.29 3.44 3.44-4.29 2.34 1.88-3.44 4.29 4.29 3.44-1.88 2.34zM149 140.86l-4.29-3.44-3.44 4.29-2.34-1.88 3.44-4.29-4.29-3.44 1.88-2.34 4.29 3.44 3.44-4.29 2.34 1.88-3.44 4.29 4.29 3.44-1.88 2.34zM212 78.86l-4.29-3.44-3.44 4.29-2.34-1.88 3.44-4.29-4.29-3.44 1.88-2.34 4.29 3.44 3.44-4.29 2.34 1.88-3.44 4.29 4.29 3.44-1.88 2.34z"/>
  </g>
</svg>

使用 SVG 掩码的解决方案。

下面是黑线class="road"
上面是一条灰线class="steps"
将蒙版应用到灰线，移动时会擦除灰线显示黑线

这会产生用黑色填充灰线的效果

svg{
  position:absolute;
  top:0;
  right:0;
  bottom:0;
  left:0;
  margin:auto;
} 

.road{
  fill:none;
  stroke:black;
  stroke-dasharray:10 10;
  stroke-dashoffset:0;
  stroke-width:2;
}
.steps{
   fill:none;
   stroke:#999;
  stroke-dasharray:10 10;
  stroke-dashoffset:0;
  stroke-width:2;
  animation: draw-steps 10s reverse;
  
}

#stepMask{
   fill:none;
   stroke:black;
   stroke-width:2;
   stroke-dashoffset: 744;
   stroke-dasharray:744,744;
 
  
}

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 300">
  <style>
    .st0{fill:none;stroke:#999;stroke-width:2;stroke-miterlimit:10}.st2{fill:#b3b3b3}
  </style>
    <defs>
	   <mask id="msk1">
	      <rect width="100%" height="100%" fill="white" />
	     <path id="stepMask"  d="M30.16 213.14c47.85-61.32 61-85.9 56.16-90.62-7.14-6.97-60.04 22.79-57 46 2.94 22.48 115.32-.75 124 27 3.14 10.05-9.18 19.09-5 25 8.54 12.09 73.6-6.39 76-30 3.26-32.1-111.39-53.93-109-82 1.2-14.1 32-30.41 153.49-42.53" >
		   <animate attributeName="stroke-dashoffset" begin="0s" dur="20s" values="744;0;744" repeatCount="indefinite"/> 
		  </path> 
	   </mask>
	</defs>
  <g id="Layer_1">
   
   <path class="road" d="M30.16 213.14c47.85-61.32 61-85.9 56.16-90.62-7.14-6.97-60.04 22.79-57 46 2.94 22.48 115.32-.75 124 27 3.14 10.05-9.18 19.09-5 25 8.54 12.09 73.6-6.39 76-30 3.26-32.1-111.39-53.93-109-82 1.2-14.1 32-30.41 153.49-42.53" />
  
   <path class="steps" mask="url(#msk1)" d="M30.16 213.14c47.85-61.32 61-85.9 56.16-90.62-7.14-6.97-60.04 22.79-57 46 2.94 22.48 115.32-.75 124 27 3.14 10.05-9.18 19.09-5 25 8.54 12.09 73.6-6.39 76-30 3.26-32.1-111.39-53.93-109-82 1.2-14.1 32-30.41 153.49-42.53" />
   
  <path class="st2" d="M55.96 140.02l-3.27-4.42-4.42 3.27-1.79-2.41 4.42-3.27-3.27-4.42 2.41-1.79 3.27 4.42 4.42-3.27 1.79 2.41-4.42 3.27 3.27 4.42-2.41 1.79zM158 200.86l-4.29-3.44-3.44 4.29-2.34-1.88 3.44-4.29-4.29-3.44 1.88-2.34 4.29 3.44 3.44-4.29 2.34 1.88-3.44 4.29 4.29 3.44-1.88 2.34zM149 140.86l-4.29-3.44-3.44 4.29-2.34-1.88 3.44-4.29-4.29-3.44 1.88-2.34 4.29 3.44 3.44-4.29 2.34 1.88-3.44 4.29 4.29 3.44-1.88 2.34zM212 78.86l-4.29-3.44-3.44 4.29-2.34-1.88 3.44-4.29-4.29-3.44 1.88-2.34 4.29 3.44 3.44-4.29 2.34 1.88-3.44 4.29 4.29 3.44-1.88 2.34z"/>
  </g>
</svg>

【讨论】：

【解决方案2】：

路上的寻宝动画

作者可能想在寻宝路线下方添加地图或景观。为了让路由和图片自适应，改变屏幕分辨率时不违反布局，需要在SVG里面添加图片

<image xlink:href="https://i.stack.imgur.com/ncK6A.jpg" width="100%" height="100%" />

我添加了一个人在路上行走的动画人物

<use xlink:href="#Man" transform="translate(0,0) scale(2.5)" style="stroke:#990E0E; fill:black;"> 
    <animateMotion id="an2"
      begin="0s"
      dur="40s"
      repeatCount="indefinite"  >
         <mpath xlink:href="#steps"/>
    </animateMotion>    

   </use>

道路着色动画和人体运动动画的协调是通过两个动画的相同持续时间来实现的。

.container {
 width:100%;
  height:100%;
}
svg{
  position:absolute;
  top:0;
  right:0;
  bottom:0;
  left:0;
  margin:auto;
 
} 

.road{
  fill:none;
  stroke:blue;
  stroke-dasharray:12 10;
  stroke-dashoffset:0;
  stroke-width:3;
}
#steps{
   fill:none;
   stroke:white;
  stroke-dasharray:12 10;
  stroke-dashoffset:0;
  stroke-width:3;
   
}

#stepMask{
   fill:none;
   stroke:black;
   stroke-width:3;
   stroke-dashoffset: 1887;
   stroke-dasharray:1887,1887;
 
  
}

<div class="container">
<svg xmlns="http://www.w3.org/2000/svg"   viewBox="0 0 1200 890" >
  
    <defs>
	   <mask id="msk1">
	      <rect width="100%" height="100%" fill="white" />
	     <path id="stepMask"  d="m398.8 299.8c0 0 70.7-30.6 108.4-33.9 44.2-3.9 88.7 7.5 132 17 73.3 16 144.1 42.3 215 66.9 22.3 7.8 45.8 13.2 66 25.5 14.7 8.9 32.8 17.8 38.7 33.9 5.1 14-6.6 29.4-6.6 44.3 0.1 76 68.8 157.8 33.9 225.3-25.2 48.8-97.9 50-147.1 74.5-32.6 16.2-62.8 38.9-98.1 48.1-34.1 8.9-70.4 6.9-105.6 5.7-72.5-2.5-163.4 23.6-215.9-26.4-31.9-30.3-9.5-88.1-22.6-130.1-8-25.8-9.6-61.8-33.9-73.5-54.1-26.2-175.4 42.4-175.4 42.4" >
		   <animate attributeName="stroke-dashoffset" begin="0s" dur="40s" values="1887;0" repeatCount="1" fill="freeze"/> 
		  </path> 
	   </mask> 
	    <g id="Man" transform="translate(0,0) scale(1,-1)">
    <path   fill="none">
         <animate
          attributeName="d"
          begin="0s"
          dur="0.4s"
          repeatCount="indefinite"
          values="M-3,0 0,10 3,0 M0,10 0,16 l 4,-5 M0,16 l-4,-5 M0,16 c4,4 -4,4 0,0;
                  M 0,0 0,10 0,0 M0,10 0,16 l 0,-5 M0,16 l 0,-5 M0,16 c4,4 -4,4 0,0;
                  M-3,0 0,10 3,0 M0,10 0,16 l 4,-5 M0,16 l-4,-5 M0,16 c4,4 -4,4 0,0"/>
    </path> 
	  </g> 
	</defs> 
	 <image xlink:href="https://i.stack.imgur.com/Gmr13.jpg"
	 width="100%" height="100%" />
  <g id="Layer_1">
   
   <path class="road" d="m398.8 299.8c0 0 70.7-30.6 108.4-33.9 44.2-3.9 88.7 7.5 132 17 73.3 16 144.1 42.3 215 66.9 22.3 7.8 45.8 13.2 66 25.5 14.7 8.9 32.8 17.8 38.7 33.9 5.1 14-6.6 29.4-6.6 44.3 0.1 76 68.8 157.8 33.9 225.3-25.2 48.8-97.9 50-147.1 74.5-32.6 16.2-62.8 38.9-98.1 48.1-34.1 8.9-70.4 6.9-105.6 5.7-72.5-2.5-163.4 23.6-215.9-26.4-31.9-30.3-9.5-88.1-22.6-130.1-8-25.8-9.6-61.8-33.9-73.5-54.1-26.2-175.4 42.4-175.4 42.4" />
   <path id="steps" mask="url(#msk1)" d="m398.8 299.8c0 0 70.7-30.6 108.4-33.9 44.2-3.9 88.7 7.5 132 17 73.3 16 144.1 42.3 215 66.9 22.3 7.8 45.8 13.2 66 25.5 14.7 8.9 32.8 17.8 38.7 33.9 5.1 14-6.6 29.4-6.6 44.3 0.1 76 68.8 157.8 33.9 225.3-25.2 48.8-97.9 50-147.1 74.5-32.6 16.2-62.8 38.9-98.1 48.1-34.1 8.9-70.4 6.9-105.6 5.7-72.5-2.5-163.4 23.6-215.9-26.4-31.9-30.3-9.5-88.1-22.6-130.1-8-25.8-9.6-61.8-33.9-73.5-54.1-26.2-175.4 42.4-175.4 42.4" />
   
  
  </g>  
  
    <use xlink:href="#Man" transform="translate(0,0) scale(2.5)" style="stroke:blue; fill:black;"> 
     <animateMotion id="an2"
       begin="0s"
       dur="40s"
       repeatCount="1"  >
          <mpath xlink:href="#steps"/>
     </animateMotion>	 

	</use>	
</svg>
</div>

【讨论】：