Cocoapod

pod 'IAPHelper'

Initialize

if(![IAPShare sharedHelper].iap) {
 NSSet* dataSet = [[NSSet alloc] initWithObjects:@"com.comquas.iap.test", nil];
 [IAPShare sharedHelper].iap = [[IAPHelper alloc] initWithProductIdentifiers:dataSet];
}

Production Mode On/Off

[IAPShare sharedHelper].iap.production = NO;

Request Products

[[IAPShare sharedHelper].iap requestProductsWithCompletion:^(SKProductsRequest* request,SKProductsResponse* response)
 {
 }];

Purchase

[[IAPShare sharedHelper].iap buyProduct:product
 onCompletion:^(SKPaymentTransaction* trans){
}];

Check Receipt with shared secret

[[IAPShare sharedHelper].iap checkReceipt:trans.transactionReceipt AndSharedSecret:@"your sharesecret" onCompletion:^(NSString *response, NSError *error) {
}];

Check Receipt without shared secret

[[IAPShare sharedHelper].iap checkReceipt:trans.transactionReceipt onCompletion:^(NSString *response, NSError *error) {
}];

Saving Product Identifier

[[IAPShare sharedHelper].iap provideContentWithTransaction:transaction];

Check for Previous Purchase

if([[IAPShare sharedHelper].iap isPurchasedProductsIdentifier:@"com.comquas.iap.test"]
	{
		// require saving product identifier first
	}

Purchased Products

NSLog(@"%@",[IAPShare sharedHelper].iap.purchasedProducts);

Clear Purchases

[[IAPShare sharedHelper].iap clearSavedPurchasedProducts];
[[IAPShare sharedHelper].iap clearSavedPurchasedProductByID:@"com.myproduct.id"];

Restore Purchase

[[IAPShare sharedHelper].iap restoreProductsWithCompletion:^(SKPaymentQueue *payment, NSError *error) {
		//check with SKPaymentQueue
		// number of restore count
		int numberOfTransactions = payment.transactions.count;
		for (SKPaymentTransaction *transaction in payment.transactions)
		{
 NSString *purchased = transaction.payment.productIdentifier;
	 if([purchased isEqualToString:@"com.myproductType.product"])
 	{
				//enable the prodcut here
	 }
 	}
}];

Example

if(![IAPShare sharedHelper].iap) {
 NSSet* dataSet = [[NSSet alloc] initWithObjects:@"com.comquas.iap.test", nil];
 [IAPShare sharedHelper].iap = [[IAPHelper alloc] initWithProductIdentifiers:dataSet];
 }
[IAPShare sharedHelper].iap.production = NO;
 [[IAPShare sharedHelper].iap requestProductsWithCompletion:^(SKProductsRequest* request,SKProductsResponse* response)
 {
 if(response > 0 ) {
 SKProduct* product =[[IAPShare sharedHelper].iap.products objectAtIndex:0];
 [[IAPShare sharedHelper].iap buyProduct:product
 onCompletion:^(SKPaymentTransaction* trans){
 if(trans.error)
 {
 NSLog(@"Fail %@",[trans.error localizedDescription]);
 }
 else if(trans.transactionState == SKPaymentTransactionStatePurchased) {
 [[IAPShare sharedHelper].iap checkReceipt:trans.transactionReceipt AndSharedSecret:@"your sharesecret" onCompletion:^(NSString *response, NSError *error) {
 //Convert JSON String to NSDictionary
 NSDictionary* rec = [IAPShare toJSON:response];
 if([rec[@"status"] integerValue]==0)
 {
 
 [[IAPShare sharedHelper].iap provideContentWithTransaction:trans];
 NSLog(@"SUCCESS %@",response);
 NSLog(@"Pruchases %@",[IAPShare sharedHelper].iap.purchasedProducts);
 }
 else {
 NSLog(@"Fail");
 }
 }];
 }
 else if(trans.transactionState == SKPaymentTransactionStateFailed) {
 NSLog(@"Fail");
 }
 }];//end of buy product
 }
}];