Question

I’m trying to set up an SKProductsRequest, but I continually get the error EXC_BAD_ACCESS. I know it has to do with ARC.
In my .h file, I have SKProductsRequestDelegate.

These are the main functions in my .m file:

- (void)requestProUpgradeProductData {
    NSSet *productIdentifiers = [NSSet setWithObject:kInAppPurchaseProUpgradeProductId];
    productsRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:productIdentifiers];
    productsRequest.delegate = self;
    [productsRequest start];
}

#pragma mark -
#pragma mark SKProductsRequestDelegate methods

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response {
    NSArray *products = response.products;
    //proUpgradeProduct = [products count] == 1 ? [products firstObject] : nil;
    proUpgradeProduct = [products objectAtIndex:0];
    if (proUpgradeProduct) {
        NSLog(@"Product title: %@" , proUpgradeProduct.localizedTitle);
        NSLog(@"Product description: %@" , proUpgradeProduct.localizedDescription);
        NSLog(@"Product price: %@" , proUpgradeProduct.price);
        NSLog(@"Product id: %@" , proUpgradeProduct.productIdentifier);
    }

    for (NSString *invalidProductId in response.invalidProductIdentifiers) {
        NSLog(@"Invalid product id: %@" , invalidProductId);
    }

    // finally release the reqest we alloc/init’ed in requestProUpgradeProductData
    productsRequest = nil;

    [self purchaseProUpgrade];

    [[NSNotificationCenter defaultCenter] postNotificationName:kInAppPurchaseManagerProductsFetchedNotification object:self userInfo:nil];
}

When I enabled NSZombieEnabled, then this is what I get: "-[InAppPurchaseManager respondsToSelector:]: message sent to deallocated instance."

Any help would be greatly appreciated.
Thanks!

Answer 1

I finally figured it out! The key is when you synthesize the variable, make sure to do it like this:

@synthesize productsRequest = _productsRequest;

And in the .h, it should look like this:

@property (nonatomic, strong) SKProductsRequest *productsRequest;

In the .m, make sure to use “self.” when using productsRequest:

self.productsRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:productIdentifiers];
self.productsRequest.delegate = self;
[self.productsRequest start];

There you go!