恢复非消耗性应用购买的快速问题

Question

我在应用中进行了非消耗性购买，但购买时遇到了问题。在模拟器中运行时效果很好，但是在设备上尝试购买时，出现此错误：

  

忽略restoreCompletedTransactionsWithApplicationUsername ：，因为已经在还原事务

我在这里发现了其他一些问题，但是我还是无法解决问题

那是我的代码：

func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {

    for transaction in transactions {        

   case SKPaymentTransactionState.restored:

            SKPaymentQueue.default().finishTransaction(transaction)

            RestoreButton.isEnabled = true
            SKPaymentQueue.default().finishTransaction(transaction)
            productTitle.text = "Thank you"
            productDescription.text = "The product has been purchased"
            buyButton.isEnabled = false

            let save = UserDefaults.standard
            save.set(true, forKey: "Purchase")
            save.synchronize()

        case SKPaymentTransactionState.failed:

            SKPaymentQueue.default().finishTransaction(transaction)
            productTitle.text = "Warning"
            productDescription.text = "The product has not been purchased"

        default:
            break

        }