打印localIdList[0]也是字符串，也有，网上说的tostring()也试了，就是报missing arguments

function uploadImage() {

  _this.$wechat.uploadImage({
    localId: localIdList[0],
    isShowProgressTips: 1,
    success: function(res) {
      serverIdList.push(res.serverId);
      localIdList.shift();
      if (localIdList.length) {
        uploadImage();
      } else {
        _this.getUploadImage(serverIdList).then(() => { _this.isDisabled = false; });
      }
    },
    fail: function(res) {
      _this.$vux.loading.hide();
      alert(JSON.stringify(res));
    }
  });
}