RewardedAd监听器onAdClosed无法在react-native中运行

Question

我使用react-native-firebase测试广告集成了adMobRewardedVideo，但广告可以正确显示，但无法向广告事件监听器发送以下消息： “ onAdClosed”，“ onAdCompleted”。

const advert = firebase.admob().rewarded('ca-app-pub-3940256099942544/5224354917');

adver.show()//showing ads 

advert.on('onAdCompleted', (onAdCompleted) => {
  alert('Advert closed.',onAdCompleted);
});

advert.on('onRewarded', (event) => {
  alert('The user watched the entire video and will now be rewarded!',event);
});