Created
August 7, 2018 08:34
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A handler class that will help you to integrate the In App Purchase (IAP) in you iPhone, iPad, iPod application developed with Swift language.
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// | |
// PKIAPHandler.swift | |
// | |
// Created by Pramod Kumar on 13/07/2017. | |
// Copyright © 2017 Pramod Kumar. All rights reserved. | |
// | |
import UIKit | |
import StoreKit | |
enum PKIAPHandlerAlertType { | |
case setProductIds | |
case disabled | |
case restored | |
case purchased | |
var message: String{ | |
switch self { | |
case .setProductIds: return "Product ids not set, call setProductIds method!" | |
case .disabled: return "Purchases are disabled in your device!" | |
case .restored: return "You've successfully restored your purchase!" | |
case .purchased: return "You've successfully bought this purchase!" | |
} | |
} | |
} | |
class PKIAPHandler: NSObject { | |
//MARK:- Shared Object | |
//MARK:- | |
static let shared = PKIAPHandler() | |
private override init() { } | |
//MARK:- Properties | |
//MARK:- Private | |
fileprivate var productIds = [String]() | |
fileprivate var productID = "" | |
fileprivate var productsRequest = SKProductsRequest() | |
fileprivate var fetchProductComplition: (([SKProduct])->Void)? | |
fileprivate var productToPurchase: SKProduct? | |
fileprivate var purchaseProductComplition: ((PKIAPHandlerAlertType, SKProduct?, SKPaymentTransaction?)->Void)? | |
//MARK:- Public | |
var isLogEnabled: Bool = true | |
//MARK:- Methods | |
//MARK:- Public | |
//Set Product Ids | |
func setProductIds(ids: [String]) { | |
self.productIds = ids | |
} | |
//MAKE PURCHASE OF A PRODUCT | |
func canMakePurchases() -> Bool { return SKPaymentQueue.canMakePayments() } | |
func purchase(product: SKProduct, complition: @escaping ((PKIAPHandlerAlertType, SKProduct?, SKPaymentTransaction?)->Void)) { | |
self.purchaseProductComplition = complition | |
self.productToPurchase = product | |
if self.canMakePurchases() { | |
let payment = SKPayment(product: product) | |
SKPaymentQueue.default().add(self) | |
SKPaymentQueue.default().add(payment) | |
log("PRODUCT TO PURCHASE: \(product.productIdentifier)") | |
productID = product.productIdentifier | |
} | |
else { | |
complition(PKIAPHandlerAlertType.disabled, nil, nil) | |
} | |
} | |
// RESTORE PURCHASE | |
func restorePurchase(){ | |
SKPaymentQueue.default().add(self) | |
SKPaymentQueue.default().restoreCompletedTransactions() | |
} | |
// FETCH AVAILABLE IAP PRODUCTS | |
func fetchAvailableProducts(complition: @escaping (([SKProduct])->Void)){ | |
self.fetchProductComplition = complition | |
// Put here your IAP Products ID's | |
if self.productIds.isEmpty { | |
log(PKIAPHandlerAlertType.setProductIds.message) | |
fatalError(PKIAPHandlerAlertType.setProductIds.message) | |
} | |
else { | |
productsRequest = SKProductsRequest(productIdentifiers: Set(self.productIds)) | |
productsRequest.delegate = self | |
productsRequest.start() | |
} | |
} | |
//MARK:- Private | |
fileprivate func log <T> (_ object: T) { | |
if isLogEnabled { | |
NSLog("\(object)") | |
} | |
} | |
} | |
//MARK:- Product Request Delegate and Payment Transaction Methods | |
//MARK:- | |
extension PKIAPHandler: SKProductsRequestDelegate, SKPaymentTransactionObserver{ | |
// REQUEST IAP PRODUCTS | |
func productsRequest (_ request:SKProductsRequest, didReceive response:SKProductsResponse) { | |
if (response.products.count > 0) { | |
if let complition = self.fetchProductComplition { | |
complition(response.products) | |
} | |
} | |
} | |
func paymentQueueRestoreCompletedTransactionsFinished(_ queue: SKPaymentQueue) { | |
if let complition = self.purchaseProductComplition { | |
complition(PKIAPHandlerAlertType.restored, nil, nil) | |
} | |
} | |
// IAP PAYMENT QUEUE | |
func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) { | |
for transaction:AnyObject in transactions { | |
if let trans = transaction as? SKPaymentTransaction { | |
switch trans.transactionState { | |
case .purchased: | |
log("Product purchase done") | |
SKPaymentQueue.default().finishTransaction(transaction as! SKPaymentTransaction) | |
if let complition = self.purchaseProductComplition { | |
complition(PKIAPHandlerAlertType.purchased, self.productToPurchase, trans) | |
} | |
break | |
case .failed: | |
log("Product purchase failed") | |
SKPaymentQueue.default().finishTransaction(transaction as! SKPaymentTransaction) | |
break | |
case .restored: | |
log("Product restored") | |
SKPaymentQueue.default().finishTransaction(transaction as! SKPaymentTransaction) | |
break | |
default: break | |
}}} | |
} | |
} |
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thanks and with love from Bangladesh!