SKProductRequest doesn't fail without connection - iphone

Question

I'd would like to handle the case in which in-app purchase products are requested without an internet connection.
When testing this case both in the simulator and a device (by turning off the wi-fi), instead of receiving a call to request:didFailWithError:, I receive a call productsRequest:didReceiveResponse: with an empty products array and then to requestDidFinish:.
Is this the expected behavior? If so, how can I know if the request failed due to a connection issue? If not, what might be wrong?
In case it helps, this is how I request the products:
- (void) requestProducts:(NSSet*)identifiers
{
_productsRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:identifiers];
_productsRequest.delegate = self;
[_productsRequest start];
}
I'm using iOS 6.

Answer 1

I don't know if its expected behavior because the docs are a little sparse on the subject. But I always do the checks myself so I can provide nice error messages to the user because it seems half the time the StoreKit Errors are very nondescript. Here is a bit of code I used in a recent project.
I have my own storeManager delegate to simplify calls and inheritance but it should be pretty clear whats happening.
#pragma mark - Purchase Methods
- (void)purchaseProduct:(SKProduct *)product
{
// Check Internet
if ([self checkInternetConnectionAndAlertUser:YES]) {
// Check Restrictions
if ([self checkRestrictionsAndAlertUser:YES]) {
// Check Products
if ([_products containsObject:product]) {
// Purchase the product
[[SKPaymentQueue defaultQueue] addPayment:[SKPayment paymentWithProduct:product]];
} else {
[[[UIAlertView alloc] initWithTitle:#"Error" message:#"Sorry, we couldn't find that product." delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil] show];
[self.delegate purchaseDidFailWithError:[NSError errorWithDomain:#"SDInAppPurchaseManager" code:404 userInfo:#{ NSLocalizedDescriptionKey : #"Product not found." }]];
}
} else {
// Not allowed to make purchase
[self.delegate requestdidFailWithError:[NSError errorWithDomain:#"SDInAppPurchaseManager" code:500 userInfo:#{ NSLocalizedDescriptionKey : #"Not authorized to make purchases." }]];
}
} else {
// No Internet
[self.delegate requestdidFailWithError:[NSError errorWithDomain:#"SDInAppPurchaseManager" code:300 userInfo:#{ NSLocalizedDescriptionKey : #"No internet connection." }]];
}
}
#pragma mark - Checks
- (BOOL)checkInternetConnectionAndAlertUser:(BOOL)alert
{
if ([[SDDataManager dataManager] internetConnection]) {
return YES;
} else {
// Alert the user if necessary.
if (alert) {
[[[UIAlertView alloc] initWithTitle:#"No Connection" message:#"You don't appear to be connected to the internet. Please check your connection and try again." delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil] show];
}
return NO;
}
}
- (BOOL)checkRestrictionsAndAlertUser:(BOOL)alert
{
if ([SKPaymentQueue canMakePayments]) {
return YES;
} else {
// Alert the user if necessary.
if (alert) {
[[[UIAlertView alloc] initWithTitle:#"Purchases Disabled" message:#"In App Purchasing is disabled for your device or account. Please check your settings and try again." delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil] show];
}
return NO;
}
}