Question

以下代码段在滚动时为SVG元素设置动画。我正在尝试用我自己的SVG替换示例中的SVG。

原始代码

$(document).ready(function(){

  $(window).scroll(function() {
    drawLine( $('#route'),
              document.getElementById('path') );
  });
  
  // init the line length
    drawLine( $('#route'),
              document.getElementById('path') );

  //draw the line
  function drawLine(container, line){
    
    var pathLength = line.getTotalLength(),
        maxScrollTop = $(document).height() - $(window).height(),
        percentDone = $(window).scrollTop() / maxScrollTop,
        length = percentDone * pathLength;
    line.style.strokeDasharray = [ length ,pathLength].join(' ');
  }
  
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<svg id="route" xmlns="http://www.w3.org/2000/svg" version="1.1" width="294" height="7293" viewBox="0 0 294.152 7293.492">
  <path id="path" fill="none" stroke="#D1232A" stroke-width="3" stroke-linecap="round" d="M157.656 7.212c0 0 100.344 178.906 100.344 321.913 0 271.418-220.792 286.061-220.792 407.951 0 121.889 240.638 175.278 240.638 249.546 0 57.827-52.157 57.26-55.559 127.03 -3.892 79.807 13.039 89.348 12.094 158.324 -0.944 68.977-77.071 136.497-115.275 179.528 -36.022 40.573-93.084 86.74-108.851 132.131 -13.381 38.524-19.24 132.253 67.276 164.471 86.516 32.217 178.575 58.708 207.387 133.319 28.812 74.611-41.038 146.05-92.111 183.308 -51.074 37.257-164.657 113.385-145.163 169.133 19.493 55.748 150.832 34.69 150.832 134.983s49.134 71.002 49.134 135.254 -36.851 200.126-36.851 247.37c0 47.243 50.41 99.401 50.41 172.157 0 72.756-45.686 154.016-45.686 235.275 0 114.331 22.678 205.04 23.622 280.63 1.469 117.537-190.866 112.442-190.866 222.048 0.945 113.385 182.567 178.233 187.958 295.748 13.138 286.299-153.376 635.527-186.667 782.361 -22.621 99.773-19.622 232.261 101.765 229.205 45.046-1.134 78.928-36.449 81.196-76.231 2.034-35.705-34.017-76.437-89.575-66.8 -59.712 10.357-91.345 60.498-106.016 136.087 -7.235 37.278-11.828 98.358-12.739 160.63 -2.394 163.629 76.938 201.007 105.149 220.85 14.682 10.326 106.274 49.377 103.748 94.15 -3.969 70.318-200.126 101.541-196.725 159.904 3.402 58.363 73.126 72.615 65.764 149.072 -7.37 76.535-80.933 101.479-80.933 180.85 0 121.324 78.098 200.126 71.295 283.465 -6.422 78.672-56.126 159.184-38.551 227.904 21.565 84.326 197.38 62.931 192.756 153.072 -3.386 65.994-171.22 82.799-212.599 141.732 -37.417 53.291-1.928 159.781 22.678 235.275 24.944 76.535 89.368 238.621 111.541 297.914"/>
</svg>

我的SVG

<?xml version="1.0" encoding="UTF-8"?>
<svg width="100%" height="100%" viewBox="0 0 1160 12974" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <!-- Generator: Sketch 46.2 (44496) - http://www.bohemiancoding.com/sketch -->
    <title>Slice 1</title>
    <desc>Created with Sketch.</desc>
    <defs></defs>
    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
        <path d="M5.9,12973 C8.7,12973 10.9,12970.7 10.9,12968 L10.9,12129.4 L1150,12129.4 C1152.8,12129.4 1155,12127.2 1155,12124.4 L1155,10233 C1155,10230.2 1152.8,10228 1150,10228 L34,10228 L34,8520 L1088.3,8520 C1091.1,8520 1093.3,8517.8 1093.3,8515 L1093.3,6735.3 C1093.3,6732.5 1091.1,6730.3 1088.3,6730.3 L34,6730.3 L34,4887.5 L1153.9,4887.5 C1156.7,4887.5 1158.9,4885.3 1158.9,4882.5 L1158.9,3110.5 C1158.9,3107.7 1156.7,3105.5 1153.9,3105.5 L37.9,3105.5 L37.9,1459.1 L537.4,1459.1 C540.2,1459.1 542.4,1456.9 542.4,1454.1 L542.4,5.7 C542.4,2.9 540.2,0.7 537.4,0.7 C534.6,0.7 532.4,2.9 532.4,5.7 L532.4,1449.1 L32.8,1449.1 C30,1449.1 27.8,1451.3 27.8,1454.1 L27.8,3110.5 C27.8,3113.3 30,3115.5 32.8,3115.5 L1148.8,3115.5 L1148.8,4877.5 L29,4877.5 C26.2,4877.5 24,4879.7 24,4882.5 L24,6735.3 C24,6738.1 26.2,6740.3 29,6740.3 L1083.3,6740.3 L1083.3,8510 L29,8510 C26.2,8510 24,8512.2 24,8515 L24,10233 C24,10235.8 26.2,10238 29,10238 L1145,10238 L1145,12119.4 L5.9,12119.4 C3.1,12119.4 0.9,12121.6 0.9,12124.4 L0.9,12968" id="path" stroke="#979797" fill="#C51586" fill-rule="nonzero"></path>
    </g>
</svg>

这是我尝试更换SVG：

我的SVG 代码

$(document).ready(function(){

  $(window).scroll(function() {
    drawLine( $('#route'),
              document.getElementById('path') );
  });
  
  // init the line length
    drawLine( $('#route'),
              document.getElementById('path') );

  //draw the line
  function drawLine(container, line){
    
    var pathLength = line.getTotalLength(),
        maxScrollTop = $(document).height() - $(window).height(),
        percentDone = $(window).scrollTop() / maxScrollTop,
        length = percentDone * pathLength;
    line.style.strokeDasharray = [ length ,pathLength].join(' ');
  }
  
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<svg width="100%" height="100%" viewBox="0 0 1160 12974" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="route">
         <path d="M5.9,12973 C8.7,12973 10.9,12970.7 10.9,12968 L10.9,12129.4 L1150,12129.4 C1152.8,12129.4 1155,12127.2 1155,12124.4 L1155,10233 C1155,10230.2 1152.8,10228 1150,10228 L34,10228 L34,8520 L1088.3,8520 C1091.1,8520 1093.3,8517.8 1093.3,8515 L1093.3,6735.3 C1093.3,6732.5 1091.1,6730.3 1088.3,6730.3 L34,6730.3 L34,4887.5 L1153.9,4887.5 C1156.7,4887.5 1158.9,4885.3 1158.9,4882.5 L1158.9,3110.5 C1158.9,3107.7 1156.7,3105.5 1153.9,3105.5 L37.9,3105.5 L37.9,1459.1 L537.4,1459.1 C540.2,1459.1 542.4,1456.9 542.4,1454.1 L542.4,5.7 C542.4,2.9 540.2,0.7 537.4,0.7 C534.6,0.7 532.4,2.9 532.4,5.7 L532.4,1449.1 L32.8,1449.1 C30,1449.1 27.8,1451.3 27.8,1454.1 L27.8,3110.5 C27.8,3113.3 30,3115.5 32.8,3115.5 L1148.8,3115.5 L1148.8,4877.5 L29,4877.5 C26.2,4877.5 24,4879.7 24,4882.5 L24,6735.3 C24,6738.1 26.2,6740.3 29,6740.3 L1083.3,6740.3 L1083.3,8510 L29,8510 C26.2,8510 24,8512.2 24,8515 L24,10233 C24,10235.8 26.2,10238 29,10238 L1145,10238 L1145,12119.4 L5.9,12119.4 C3.1,12119.4 0.9,12121.6 0.9,12124.4 L0.9,12968" id="path" stroke="#D1232A" stroke-width="3" fill="none"></path>
</svg>

正如你所看到的，某些东西不能正常工作。我真的很难理解为什么。似乎我的SVG是颠倒的，所以我在Sketch上将其反转，但它没有改变任何东西（也尝试使用Inkscape）。

我对SVG很新，所以如果答案显而易见，请原谅我！

谢谢！

Answer 1

它是您添加积分的顺序。让我们将你的生产线简化为自上而下的东西，你就会看到一切正常：

＆＃13;

$(document).ready(function(){

  $(window).scroll(function() {
    drawLine( $('#route'),
              document.getElementById('path') );
  });
  
  // init the line length
    drawLine( $('#route'),
              document.getElementById('path') );

  //draw the line
  function drawLine(container, line){
    
    var pathLength = line.getTotalLength(),
        maxScrollTop = $(document).height() - $(window).height(),
        percentDone = $(window).scrollTop() / maxScrollTop,
        length = percentDone * pathLength;
    line.style.strokeDasharray = [ length ,pathLength].join(' ');
  }
  
});

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<svg width="100%" height="100%" viewBox="0 0 1160 12974" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="route">
         <path d="M100, 0 L 100,12974" id="path" stroke="#D1232A" stroke-width="3" fill="none"></path>
</svg>

＆＃13;

现在让我们尝试重新创建您的行排序：

＆＃13;

$(document).ready(function(){

  $(window).scroll(function() {
    drawLine( $('#route'),
              document.getElementById('path') );
  });
  
  // init the line length
    drawLine( $('#route'),
              document.getElementById('path') );

  //draw the line
  function drawLine(container, line){
    
    var pathLength = line.getTotalLength(),
        maxScrollTop = $(document).height() - $(window).height(),
        percentDone = $(window).scrollTop() / maxScrollTop,
        length = percentDone * pathLength;
    line.style.strokeDasharray = [ length ,pathLength].join(' ');
  }
  
});

＆＃13;

svg { margin-top: 100vh }

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<svg width="100%" height="100%" viewBox="0 0 1160 11600" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="route">
         <path d="
          M 10, 0 
          h 1140 
          v 1160 
          h -1140 
          v 1160
          h 1140 
          v 1160 
          h -1140 
          v 1160
          h 1140 
          v 1160 
          h -1140 
          v 1160
          h 1140 
          v 1160 
          h -1140 
          v 1160
          h 1140 
          v 1160 
          h -1140 
          v 1160" id="path" stroke="#D1232A" stroke-width="3" fill="none"></path>
</svg>

＆＃13;

这与路径的创建方式有关，请查看docs： https://developer.mozilla.org/en-US/docs/Web/SVG/Tutorial/Paths

我所做的是使用h移动水平，v移动垂直（小写使其相对于最后一点）以重新创建路径。在制作这些路径时，请务必先添加第一个点并继续从那里开始，否则将无法达到正确的效果。订单很重要！

此路径的另一个问题是，它的长度并不代表您的滚动距离一对一，因此根据您的屏幕大小，路径可能根本不可见。当使用stroke-dasharray重新创建填充的路径时，这些都是限制。我将你的svg 100vh向下移动，以便能够一致地看到该行。

Answer 2

你的第二个（自己的）svg没有id =“route”。我用在线观看者检查了它。你自己的svg没有填满，路径没有关闭我想。

带SVG的动画线

原始代码

我的SVG

2 个答案: