问微信小程序stopRecord返回值为空？

wx.startRecord({

success: function (res) {

}

})

//点击停止录音

Stoprecord() {

var that = this;

setTimeout(function () {

wx.stopRecord({

fail: function (res) {

//alert("停止失败");

},

success: function (res) {

var localId = res.localId;

console.log("IDIDID:"+localId)

console.log(localId)

}

});

}, 1600);

},

localid 返回一直为空