function play(){

  const backgroundAudioManager =

  wx.getBackgroundAudioManager()

  const title ='测试'

  backgroundAudioManager.title = title

  backgroundAudioManager.epname = title

  backgroundAudioManager.singer = title

  backgroundAudioManager.src ='https://xx.com/voice.mp3'

  backgroundAudioManager.onCanplay(res => {

     console.log('onCanplay 可以播放音乐了++++')

  })

}