In-app purchase, show products but nothing happens - iphone

Question

I am trying to implement IAPs in one app but I'm still having difficulties with it. I followed various tutorials but all of them are out of date and full of errors. The only one that could work that I found is this one:
But I'm having a problem, the 3 products appear on my tableview but then when I click on one of them nothing happens... cell become blue and that's all... Am I missing something?
Or is that tutorial incomplete?
How do I run the purchase attempt?
Here is my code:
-(void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response
{
[productDetailsList addObjectsFromArray: response.products];
[productDisplayTableView reloadData];
}
-(void)request:(SKRequest *)request didFailWithError:(NSError *)error
{
NSLog(#"Failed to connect with error: %#", [error localizedDescription]);
}
- (NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section
{
return [self.productDetailsList count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *GenericTableIdentifier = #"GenericTableIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier: GenericTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier: GenericTableIdentifier];
}
NSUInteger row = [indexPath row];
SKProduct *thisProduct = [productDetailsList objectAtIndex:row];
[cell.textLabel setText:[NSString stringWithFormat:#"%# - %#", thisProduct.localizedTitle, thisProduct.price]];
return cell;
}
- (void)viewDidLoad
{
productDetailsList = [[NSMutableArray alloc] init];
productIdentifierList = [[NSMutableArray alloc] init];
for (short item_count=1; item_count <= 5; item_count++) {
[productIdentifierList addObject:[NSString stringWithFormat:#"com.mycompany.myapp.%d", item_count]];
}
SKProductsRequest *request = [[SKProductsRequest alloc] initWithProductIdentifiers:[NSSet setWithArray:productIdentifierList]];
request.delegate = self;
[request start];
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}

Answer 1

You need to have something in the lines of:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([SKPaymentQueue canMakePayments])
{
SKProduct *selectedProduct = [self.productDetailsList objectAtIndex:indexPath.row];
SKPayment *payment = [SKPayment paymentWithProduct:selectedProduct];
[[SKPaymentQueue defaultQueue] addPayment:payment];
}
}
Apple provides a decent step by step guide for handling in app purchases.

Answer 2

The main way to run IAPs involves a few different methods, but there are a few different steps you need to follow when implementing IAPs.
The first of these requirements are protocols. Please include each of the following protocols in your header file.
SKProductsRequestDelegate
SKPaymentTransactionObserver
SKRequestDelegate
You need the request methods:
-(void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response
{
if(response.products.count > 0)
{
SKProduct* product;
for(int i = 0; i<response.products.count; i++)
{
product = [response.products objectAtIndex:i];
if([product.productIdentifier isEqualToString:#"product identifier"])
{
self.currentProduct = product;
[self beginPaymentWithProduct:product];
}
}
}
}
I used the if statement to keep track of which product was being purchased. You will need an if-statement in that for-loop for each product identifier if you have multiple products. Use this later to unlock whatever on completion of the purchase.
You will also need the beginPayment method:
- (void)beginPaymentWithProduct:(SKProduct*)product
{
SKPayment *payment = [SKPayment paymentWithProduct:product];
[[SKPaymentQueue defaultQueue] addPayment:payment];
}
You also need the payment processing methods. I will not post all of them here as this would take far too much space, but I will give you the prototypes.
-(void)requestDidFinish:(SKRequest *)request;
-(void)request:(SKRequest *)request didFailWithError:(NSError *)error;
- (void)recordTransaction:(SKPaymentTransaction *)transaction;
- (void)finishTransaction:(SKPaymentTransaction *)transaction wasSuccessful:(BOOL)wasSuccessful;
- (void)completeTransaction:(SKPaymentTransaction *)transaction;
- (void)restoreTransaction:(SKPaymentTransaction *)transaction;
- (void)failedTransaction:(SKPaymentTransaction *)transaction;
For each of your buttons in your table that are supposed to be purchasing, they will need to perform a method similar to this one on the didSelectRowAtIndex... method:
- (void)buyCoins:(id)sender
{
if([self canMakePurchases])
{
ualRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:[NSSet setWithArray:[NSArray arrayWithObjects: #"product identifier", nil]]];
[ualRequest setDelegate:self];
[ualRequest start];
}
}
This method will run the product request successfully. If you have all of these components in, you should have no problems.
I have used this code successfully in several apps.