录制声音无法本地播发

我在小程序中录制了一个声音文件，却无法播放。

录音代码：

wx.startRecord({

success:function(res){

var tempFilePath=res.tempFilePath;

that.setData({

voicepath: tempFilePath,

voiceIcon:“/images/play.png”,

voiceOperator:“playVoice”

})

}

})

播放的代码：

this.audioCtx = wx.createAudioContext(‘myAudio’);

console.log(this.data.voicepath);

this.audioCtx.setSrc(this.data.voicepath);

this.audioCtx.play();