svg动画之动态描边效果

1、首先先做一个简单的线一点一点画出来的效果,主要使用svg中的“strokeDasharray”、“strokeDashoffset”属性,通过css3中的transtion改变strokeDashoffset来实现动画。

注:path中的数据通过在ai中划线后存储为svg格式就可以拿到;

效果图:

svg动画之动态描边效果

代码如下:

<svg xmlns="http://www.w3.org/2000/svg"> <path d="M62.9 14.9c-25-7.74-56.6 4.8-60.4 24.3-3.73 19.6 21.6 35 39.6 37.6 42.8 6.2 72.9-53.4 116-58.9 65-18.2 191 101 215 28.8 5-16.7-7-49.1-34-44-34 11.5-31 46.5-14 69.3 9.38 12.6 24.2 20.6 39.8 22.9 91.4 9.05 102-98.9 176-86.7 18.8 3.81 33 17.3 36.7 34.6 2.01 10.2.124 21.1-5.18 30.1" stroke="#000" stroke-width="4" fill="none"> </path> </svg> <script> //svg 动画一般用transtion和animation var path1 = document.querySelector(".move_line1 path"); var length1 = path1.getTotalLength(); //清除动作 path1.style.transtion = path1.style.WebkitTransition = "none"; //设置起点 path1.style.strokeDasharray = length1 + ' ' + length1; path1.style.strokeDashoffset = length1; //获取一个区域,获取相关的样式,让浏览器寻找一个起始点 path1.getBoundingClientRect(); //定义动作 path1.style.transition = path1.style.WebkitTransition = 'stroke-dashoffset 2s ease-in-out'; //GO path1.style.strokeDashoffset = '0'; </script>

2、与画线的效果,接下来用同样的原理来画一个“蓝胖子”,蓝胖子同样是需要用ai画出来,将所有的元素存在数组里面遍历时改变transtion中的during和delay从而实现划线的先后顺序。

效果图:

svg动画之动态描边效果

代码如下:

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x_1=path2.getAttribute("x1"),y_1=path2.getAttribute("y1"),x_2=path2.getAttribute("x2"),y_2=path2.getAttribute("y2"); length = Math.sqrt(Math.pow((x_1-x_2),2) + Math.pow((y_1-y_2),2)); } path2.style.strokeDasharray = length + ' ' + length; path2.style.strokeDashoffset = length; return Math.pow(length, 0.5) * 0.02; }); paths[0].getBoundingClientRect(); paths.forEach(function(path, i) { path.style.transition = path.style.WebkitTransition = 'stroke-dashoffset ' + durations[i] + 's ' + begin + 's ease-in-out'; path.style.strokeDashoffset = '0'; path.setAttribute("class", "shade"); begin += durations[i] + 0.1; }); } window.addEventListener('load', fullSketch); }()); </script>

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