iOS In-App Purchase Single IAP in Swift 2
Example
After creating an IAP in iTunesConnect:
In the view controller that you want to buy in
import StoreKit
and add the relevant delegates
class ViewController: UIViewController, SKProductsRequestDelegate, SKPaymentTransactionObserver {
declare a variable with the product id from iTunesConnect
var product_id: NSString?
override func viewDidLoad() {
product_id = "YOUR_PRODUCT_ID"
super.viewDidLoad()
SKPaymentQueue.defaultQueue().addTransactionObserver(self)
//Check if product is purchased
if (NSUserDefaults.standardUserDefaults().boolForKey("purchased")){
// Hide ads
adView.hidden = true
} else {
print("Should show ads...")
}
}
wire a button to a function to purchase the IAP
@IBAction func unlockAction(sender: AnyObject) {
print("About to fetch the product...")
// Can make payments
if (SKPaymentQueue.canMakePayments())
{
let productID:NSSet = NSSet(object: self.product_id!);
let productsRequest:SKProductsRequest = SKProductsRequest(productIdentifiers: productID as! Set<NSString>);
productsRequest.delegate = self;
productsRequest.start();
println("Fetching Products");
}else{
print("Can't make purchases");
}
}
And here are some helper methods
func buyProduct(product: SKProduct){
println("Sending the Payment Request to Apple");
let payment = SKPayment(product: product)
SKPaymentQueue.defaultQueue().addPayment(payment);
}
the delegate methods that must be declared
func productsRequest (request: SKProductsRequest, didReceiveResponse response: SKProductsResponse) {
let count : Int = response.products.count
if (count>0) {
var validProduct: SKProduct = response.products[0] as SKProduct
if (validProduct.productIdentifier == self.product_id) {
print(validProduct.localizedTitle)
print(validProduct.localizedDescription)
print(validProduct.price)
buyProduct(validProduct);
} else {
print(validProduct.productIdentifier)
}
} else {
print("nothing")
}
}
func request(request: SKRequest!, didFailWithError error: NSError!) {
print("Error Fetching product information");
}
func paymentQueue(_ queue: SKPaymentQueue,
updatedTransactions transactions: [SKPaymentTransaction])
{
print("Received Payment Transaction Response from Apple");
for transaction:AnyObject in transactions {
if let trans:SKPaymentTransaction = transaction as? SKPaymentTransaction{
switch trans.transactionState {
case .Purchased:
print("Product Purchased");
SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction)
// Handle the purchase
NSUserDefaults.standardUserDefaults().setBool(true , forKey: "purchased")
adView.hidden = true
break;
case .Failed:
print("Purchased Failed");
SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction)
break;
case .Restored:
print("Already Purchased");
SKPaymentQueue.defaultQueue().restoreCompletedTransactions()
// Handle the purchase
NSUserDefaults.standardUserDefaults().setBool(true , forKey: "purchased")
adView.hidden = true
break;
default:
break;
}
}
}
}
And then the code to restore a non-consumable in app purchase
if (SKPaymentQueue.canMakePayments()) {
SKPaymentQueue.defaultQueue().restoreCompletedTransactions()
}
