捕获[[SKPaymentQueue defaultQueue] restoreCompletedTransactions]的取消事件

let queue = SKPaymentQueue.default()
queue.restoreCompletedTransactions()

// Handle the transactions that are restored
func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
    // Check for cancel events
    for transaction in transactions {
        if transaction.transactionState == .purchased {
            // Process the purchase
        } else if transaction.transactionState == .restored {
            // Process the restore
        } else if transaction.transactionState == .deferred {
            // Process the deferred transaction
        } else if transaction.transactionState == .failed {
            // Handle the failed transaction
        }
    }
}