vue2.0+SVG实现音乐播放圆形进度条组件

<template>
 <div class="progress-circle">
 <svg :width="radius" :height="radius" viewBox="0 0 100 100" version="1.1" xmlns="http://www.w3.org/2000/svg">
  <circle class="progress-background" r="50" cx="50" cy="50" fill="transparent"/>
  <circle class="progress-bar" r="50" cx="50" cy="50" fill="transparent" :stroke-dasharray="dashArray"
    :stroke-dashoffset="dashOffset"/>
 </svg>
 <slot></slot>
 </div>
</template>
 
<script type="text/ecmascript-6">
 export default {
 props: {
  radius: {
  type: String,
  default: '0.32rem'
  },
  percent: {
  type: Number,
  default: 0
  }
 },
 data() {
  return {
  dashArray: Math.PI * 100
  }
 },
 computed: {
  dashOffset() {
  return (1 - this.percent) * this.dashArray
  }
 }
 }
</script>
 
<style scoped lang="stylus" rel="stylesheet/stylus">
 .progress-circle
 position: relative
 circle
  stroke-width: 0.16rem
  transform-origin: center
  &.progress-background
  transform: scale(0.9)
  stroke: rgba(255, 205, 49, 0.5)
  &.progress-bar
  transform: scale(0.9) rotate(-90deg)
  stroke: #ffcd32
</style>

<div class="control">
 <progress-circle :radius="radius" :percent="percent">
  <i @click.stop="togglePlaying" class="icon-mini" :class="iconMiniPlay"></i>
 </progress-circle>
</div>

 .control
 position absolute
 top 0.35rem
 right 1rem
 color $color-theme-d
 .icon-mini
 font-size: 0.64rem
 position: absolute
 left: 0
 top: 0