Bag Labs Post - In-App Purchases - Restoring Purchases Section

Restoring_Purchases.swift

//Start by conforming to the SKPaymentTransactionObserver
 
//Restore button pressed
@IBAction func restorePurchasesBtnPressed(sender: AnyObject)
{
    SKPaymentQueue.defaultQueue().addTransactionObserver(self)
    SKPaymentQueue.defaultQueue().restoreCompletedTransactions()
}
 
//MARK: SKPaymentTransactionObserver methods
func paymentQueue(queue: SKPaymentQueue!, updatedTransactions transactions: [AnyObject]!)
{
    for transaction in transactions as! [SKPaymentTransaction]
    {
        switch transaction.transactionState
        {
            case SKPaymentTransactionState.Purchased:
                println("Transaction completed successfully.")
                SKPaymentQueue.defaultQueue().finishTransaction(transaction)
            case SKPaymentTransactionState.Restored:
                println("Transaction restored successfully.")
                SKPaymentQueue.defaultQueue().finishTransaction(transaction)
            case SKPaymentTransactionState.Failed:
                println("Transaction Failed");
                //Handle the Error!
                SKPaymentQueue.defaultQueue().finishTransaction(transaction)
             
            default:
                println(transaction.transactionState.rawValue)
        }
    }
}
 
func paymentQueue(queue: SKPaymentQueue!, restoreCompletedTransactionsFailedWithError error: NSError!)
{
    //Handle the Error!
    println("Failed to restore in app purchases")
}
 
func paymentQueueRestoreCompletedTransactionsFinished(queue: SKPaymentQueue!)
{
    for transaction:SKPaymentTransaction in queue.transactions as! [SKPaymentTransaction]
    {
        if transaction.payment.productIdentifier == "ProducId1"
        {
            //Unlock Purchase 1
        }
        else if transaction.payment.productIdentifier == "ProductId2"
        {
            //Unlock Purchase 2
        }
    }
}