In app purchase

Iap

class ViewController: UIViewController, SKProductsRequestDelegate, SKPaymentTransactionObserver {

let productIdentifiers = Set(["20diamonds", "premium"])
var productsArray = Array<SKProduct>()


override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    
    SKPaymentQueue.default().add(self)
    
    requestProductData()
}

@IBAction func buyProduct1(_ sender: AnyObject) {
    let payment = SKPayment(product: productsArray[0])
    SKPaymentQueue.default().add(payment)
}

@IBAction func restorePurchases(_ sender: AnyObject) {
    SKPaymentQueue.default().restoreCompletedTransactions()
}

func requestProductData()
{
    if SKPaymentQueue.canMakePayments() {
        let request = SKProductsRequest(productIdentifiers: self.productIdentifiers as Set<String>)
        request.delegate = self
        request.start()
    } else {
        // Kan ej köpa
    }
}

func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
    
    var products = response.products
    
    if (products.count != 0) {
        for i in 0 ..< products.count
        {
            self.productsArray.append(products[i])
            print("*****************")
            print(products[i].localizedTitle)
            print(products[i].localizedDescription)
            print(products[i].price)
            print(products[i].priceLocale) . // vilket språk valutan är i
            
        }
        // Sätter valuta efter land
        let currency_format = NumberFormatter()
        currency_format.numberStyle = NumberFormatter.Style.currency
        currency_format.locale = products[0].priceLocale

        product1title.text = self.productsArray[0].localizedTitle+" "+currency_format.string(from: products[0].price)!;
        product1description.text = self.productsArray[0].localizedDescription;

        product2title.text = self.productsArray[1].localizedTitle+" "+currency_format.string(from: products[1].price)!;
        product2description.text = self.productsArray[1].localizedDescription;
        
        buy1Button.isEnabled = true
        buy2Button.isEnabled = true
        
    } else {
        print("No products found")
    }
    
}


func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
    print("paymentQueue updatedTransactions")
    
    for transaction in transactions {
        
        switch transaction.transactionState {
            
        case SKPaymentTransactionState.purchased:
            print("Transaction Approved")
            print("Product Identifier: \(transaction.payment.productIdentifier)")
            self.deliverProduct(transaction)
            SKPaymentQueue.default().finishTransaction(transaction)
            
        case SKPaymentTransactionState.failed:
            print("Transaction Failed")
            SKPaymentQueue.default().finishTransaction(transaction)
        default:
            break
        }
    }
}

func deliverProduct(_ transaction:SKPaymentTransaction) {
    print("deliverProduct "+transaction.payment.productIdentifier)
    if transaction.payment.productIdentifier == "20diamonds"
    {
        print("20diamonds bought")
    }
    else if transaction.payment.productIdentifier == "premium"
    {
        print("premium bought")
    }
}

func paymentQueueRestoreCompletedTransactionsFinished(_ queue: SKPaymentQueue) {
    print("Transactions Restored")
    
    for transaction:SKPaymentTransaction in queue.transactions
    {
        if transaction.payment.productIdentifier == "20diamonds"
        {
            print("20diamonds Restored")
        }
        else if transaction.payment.productIdentifier == "premium"
        {
            print("premium Restored")
        }
    }
}

func paymentQueue(_ queue: SKPaymentQueue, restoreCompletedTransactionsFailedWithError error: Error) {
    print("Restore failed")
}