小程序怎么做音乐播放条

 <view>    <audio></audio>  </view>    <view>    <view>      <view>点击播放</view>    </view>        <progress></progress>        <view>{{musicPercent}}%</view>  </view>

.play-it{  margin-left: 300rpx;}.music-prog{  width: 550rpx;  height: 10rpx;  margin: 50rpx 100rpx;  color: #0099ff;  background-color: #999;}.percent-num{  margin: -20rpx 0 0 100rpx;  font-size: 28rpx;}

onShow() {    // 监听音乐播放    let that = this    wx.onBackgroundAudioPlay(() => {      that.timer && clearInterval(that.timer)      that.timer = setInterval(() => {        wx.getBackgroundAudioPlayerState({          success: res => {            let per = (res.currentPosition/res.duration)*10000            that.setData({              musicPercent: Math.round(per)/100 + '',              duration: res.duration            })          }        })      }, 1000)    })    // 监听背景音频暂停事件    wx.onBackgroundAudioPause(() => {      clearInterval(that.timer)    })    // 监听背景音频停止事件    wx.onBackgroundAudioStop(() => {      clearInterval(that.timer)    })  },    playMusic() { 	 let obj = {       dataUrl: 'http://p6jceeddp.bkt.clouddn.com/%E5%B0%A4%E9%95%BF%E9%9D%96%20-%20%E6%98%A8%E6%97%A5%E9%9D%92%E7%A9%BA.mp3',        title: '昨日青空',        coverImgUrl: '/static/images/avatar.png'      }      wx.playBackgroundAudio(obj)    },   setTouchMove (e) {    if(e.touches[0].clientY >= 390 && e.touches[0].clientY = 55 && e.touches[0].clientX  {        that.data.current !== res.currentPosition &&        wx.seekBackgroundAudio({          position: that.data.current,          success () {            console.log('seek', that.data.current)          }        })      }    })  }