selectAnswer(e) { // 提示音 开始     this.innerAudioContext = wx.createInnerAudioContext()     var src = '/asserts/sound/1.mp3';     this.innerAudioContext.autoplay = true;     this.innerAudioContext.obeyMuteSwitch = true;     this.innerAudioContext.src = src;     this.innerAudioContext.play();     // 提示音 结束 }