Implementing in app purchase and its restoration in iphone - iphone

Question

I have implemented in app purchase in one of my application using MKStoreManager.Now got a new guideline from apple that if you are doing in app purchase,you have to give the user,the option for restoring the already purchased application.So i have done like this.On the 'restore' button click,this method is called.
- (void) checkPurchasedItems
{
[[SKPaymentQueue defaultQueue] addTransactionObserver:self];
[[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
}
and from here,this method is fired
- (void) paymentQueueRestoreCompletedTransactionsFinished:(SKPaymentQueue *)queue
{
NSMutableArray* purchasableObjects = [[NSMutableArray alloc] init];
NSLog(#"received restored transactions: %i", queue.transactions.count);
for (SKPaymentTransaction *transaction in queue.transactions)
{
NSString *productID = transaction.payment.productIdentifier;
[purchasableObjects addObject:productID];
}
}
But now i have a doubt that how can i check this restoration is working or not.Can anyone guide me.thanks in advance.

Answer 1

Here is how you implement the Restoration
- (void)loadStore
{
// restarts any purchases if they were interrupted last time the app was open
[[SKPaymentQueue defaultQueue] addTransactionObserver:self];
// get the product description (defined in early sections)
[self requestProUpgradeProductData];
}
- (void)requestProUpgradeProductData
{
NSSet *productIdentifiers = [NSSet setWithObject:kInAppPurchaseProUpgradeProductId];
productsRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:productIdentifiers];
productsRequest.delegate = self;
[productsRequest start];
// we will release the request object in the delegate callback
}
After this it will call this method
- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response
{
NSArray *products = response.products;
proUpgradeProduct = [products count] == 1 ? [[products objectAtIndex:0] retain] : nil;
if (proUpgradeProduct)
{
NSLog(#"Product title: %#" , proUpgradeProduct.localizedTitle);
NSLog(#"Product description: %#" , proUpgradeProduct.localizedDescription);
NSLog(#"Product price: %#" , proUpgradeProduct.price);
NSLog(#"Product id: %#" , proUpgradeProduct.productIdentifier);
if ([self canMakePurchases]) {
if ([self respondsToSelector:#selector(purchaseProUpgrade)]) {
[self purchaseProUpgrade];
}
}
else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:[self languageSelectedStringForKey:#"Error"] message:#"Cannot connect to Store.\n Please Enable the Buying in settings" delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil, nil];
[alert show];
[alert release];
}
}
for (NSString *invalidProductId in response.invalidProductIdentifiers)
{
[SVProgressHUD dismiss];
[cancelButton setEnabled:YES];
[buyNowButton setEnabled:YES];
[restoreButton setEnabled:YES];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Warning" message:#"Error occured" delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil, nil];
[alert show];
[alert release];
NSLog(#"Invalid product id: %#" , invalidProductId);
}
// finally release the reqest we alloc/init’ed in requestProUpgradeProductData
[productsRequest release];
[[NSNotificationCenter defaultCenter] postNotificationName:kInAppPurchaseManagerProductsFetchedNotification object:self userInfo:nil];
}
- (void)completeTransaction:(SKPaymentTransaction *)transaction
{
[self recordTransaction:transaction];
[self provideContent:transaction.payment.productIdentifier];
[self finishTransaction:transaction wasSuccessful:YES];
}
- (void)purchaseProUpgrade
{
[SVProgressHUD showInView:self.view status:[self languageSelectedStringForKey:#"Connecting Store"] networkIndicator:YES];
SKPayment *payment = [SKPayment paymentWithProductIdentifier:kInAppPurchaseProUpgradeProductId];
[[SKPaymentQueue defaultQueue] addPayment:payment];
}
- (void)recordTransaction:(SKPaymentTransaction *)transaction
{
if ([transaction.payment.productIdentifier isEqualToString:kInAppPurchaseProUpgradeProductId])
{
// save the transaction receipt to disk
[[NSUserDefaults standardUserDefaults] setValue:transaction.transactionReceipt forKey:#"proUpgradeTransactionReceipt" ];
[[NSUserDefaults standardUserDefaults] synchronize];
}
}
Finally this method
- (void)finishTransaction:(SKPaymentTransaction *)transaction wasSuccessful: (BOOL)wasSuccessful
{
// remove the transaction from the payment queue.
[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
NSDictionary *userInfo = [NSDictionary dictionaryWithObjectsAndKeys:transaction, #"transaction" , nil];
if (wasSuccessful)
{
//Write your transaction complete statement required for your project
}