let back = wx.getBackgroundAudioManager()     let that = this     wx.request({       url: app.globalData.baseUrl + '/front/home/getConfig',       success(res) {         that.setData({           music:true         })         back.src = res.data.data.music         back.title = 'Tassel' // 标题为必选项         back.play()       }     })