2021-05-24 00：00开始计算时间

// 格式化音乐播放的时间为0：00。借助onProgress的定时器调用，更新当前时间

formatMediaTime = (time) => {

let hour =parseInt(time /3600, 10);

  let minute =Math.floor(time /60);

  let second =parseInt(time - minute *60, 10);

  hour = hour >=10 ? hour :`0${hour}`;

  minute = minute >=10 ? minute :`0${minute}`;

  second = second >=10 ? second :`0${second}`;

  return `${hour} : ${minute} : ${second}`;

}