我有一个非常基本，但令人兴奋的问题，我无法弄清楚。以下是：

问题 简介

我从IAP得到了 receipt 对象，但不能得到 productId 子对象。它返回 undefined ？怎么会发生这种事？receipt.productID返回未定义的，尽管接收对象是ok的，并且有一个未定义的productId子对象。它应该完美地返回'lite_plan‘，但它返回未定义的？

  initIAP = () => {
RNIap.initConnection().then(() => {
  RNIap.flushFailedPurchasesCachedAsPendingAndroid().catch(() => {
  }).then(() => {
    console.log('open listener')
    this.purchaseUpdateSubscription = purchaseUpdatedListener((purchase: InAppPurchase | SubscriptionPurchase | ProductPurchase ) => {
      console.log('purchaseUpdatedListener', purchase);
      var receipt = purchase.transactionReceipt;
      if (receipt) {
       console.log('receipt >> ' + receipt)
       console.log('product id >> ' + receipt.productId)
         AsyncStorage.setItem('activeplan_local', receipt.productId).then(() => { 
.....

控制台输出：

receipt >> {"orderId":"****","packageName":"com.****","productId":"lite_plan","purchaseTime":1617193622753,"purchaseState":0,"purchaseToken":"*****","autoRenewing":true,"acknowledged":false}
product id >> undefined

你能给我看看这个问题吗？

多谢你们的支持