SVG实现的圆环旋转效果
分类：实例代码
本章节分享一段代码实例，它使用svg实现了圆环旋转效果。
需要的朋友可以做一下参考，代码实例如下:
<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="http://www.pipipi.net/" />
<title>前端教程网</title>
<style type="text/css">
circle{
-webkit-transition: stroke-dasharray .25s;
transition: stroke-dasharray .25s;
}
</style>
<script>
window.onload = function () {
if (window.addEventListener) {
var range = document.querySelector("#range");
var circle = document.querySelectorAll("circle")[1];
if (range && circle) {
range.addEventListener("change", function () {
var percent = this.value / 100, perimeter = Math.PI * 2 * 170;
circle.setAttribute('stroke-dasharray', perimeter * percent + " " + perimeter * (1 - percent));
});
}
}
}
</script>
</head>
<body>
<svg width="440" height="440" viewbox="0 0 440 440">
<circle
cx="220" cy="220"
r="170"
stroke-width="50"
stroke="#D1D3D7"
fill="none">
</circle>
<circle
cx="220" cy="220"
r="170"
stroke-width="50"
stroke="#00A5E0"
fill="none"
transform="matrix(0,-1,1,0,0,440)"
stroke-dasharray="0 1069">
</circle>
</svg>
<p>拖我：<input id="range" type="range" min="0" max="100" value="0" style="width:300px;"></p>
</body>
</html>
妥当按钮即可查看环形效果。