/**
   * 播放音频
   */
  playAudio(e) {
    const _this = this;
    wx.stopVoice()
    showToast('text', '播放中', {
      duration: 120 * 1000,
      mask: true
    })
    let audio = e.currentTarget.dataset.audio;
    let audioSave = _this.data.audioSave;
    console.log('audio:',audio.name,'  audioSave:',audioSave)
    if (audio.ext === 'mp3') { // 小程序发送的
      this.data.audioContext.src = audio.url
    } else {
      this.data.audioContext.src = audio.mp3Url
    }
    if (audio.name == audioSave) {
      console.log('播放同一个语音，将其暂停')
      this.data.audioContext.pause();
      //初始化
      this.setData({
        audioSave: ''
      })
    } else{
      //不是同一个语音 直接播放其它，将此次语音记录
      this.data.audioContext.play()
      this.setData({
        audioSave: audio.name
      })
    }
  },