In App purchase - hide button when complete

[ppn]

I'm implementing an in app purchase and everything works fine in the sandbox environment but I can't seem to hide the "upgrade" button once the purchase is complete. I have a bool value to store whether the app has been purchased but after the purchase, I need to go to another view and come back before the upgrade button is hidden.

Any suggestions? I've followed the example in this website for the in app purchase template. Is there a way to send a notification to my main view and request it to hide the button?

- (IBAction)upgrade:(id)sender{
    InAppPurchase *inAppPurchase = [[InAppPurchase alloc] init];
    [inAppPurchase requestProUpgradeProductData];
    [inAppPurchase purchaseProUpgrade];
    if ([[NSUserDefaults standardUserDefaults] boolForKey:kupgradePurchased] == YES) {
        upgrade.hidden = YES;
    }
}

[twild]

Are you sure the purchase has been completed before you check that it has been purchased? Probably not

You should probably put the "hide button" code in some type of delegate.

[ppn]

That's the thing. It's not complete before I check for it. Does the in app purchase return anything once the purchase is complete? Can the in app purchase call on anything to hide the button for me?

[JasonR]

Your main view can also register to get a notification. Just repeat this line here in your main view, at some point before the purchase occurs:

[[SKPaymentQueue defaultQueue] addTransactionObserver:self];

Then, in your main view, write a new function that updates your UI instead of updating the transactions:

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions {
    //Update your UI in here
}

[ppn]

If I put the line below then I get warning: Sending 'MainViewController' to parameter of incompatible type 'id<SKPaymentTransactionObserver'. I don't have all my inapp purchase in my mainviewcontroller.

[[SKPaymentQueue defaultQueue] addTransactionObserver:self];

Should I put:

[[SKPaymentQueue defaultQueue] addTransactionObserver:inAppPurchase];

Since I allocated and initialized an instance of InAppPurchase in my main view controller

[JasonR]

Which ever is easier to do the UI update in. You could just add <SKPaymentTransactionObserver> to your MainViewController as well.

[ppn]

It doesn't work.

Here's what I have in my mainview.h file:

@interface MainViewController : UIViewController <FlipsideViewControllerDelegate, QuizViewControllerDelegate, LessonTableViewControllerDelegate, TabBarViewControllerDelegate, SKPaymentTransactionObserver>

In my mainview.m file I have. I put a debug code and when I finish with the in app purchase, it doesn't look like the updatdTransaction method is being called. The debug code doesn't show up on the console. I have to go to another view and then come back for the upgrade button to be hidden.

Any idea why it's not being called?

- (IBAction)upgrade:(id)sender{
    if ([[NSUserDefaults standardUserDefaults] boolForKey:kupgradePurchased] == YES) {
        upgrade.hidden = YES;
    } else {
        if ([SKPaymentQueue canMakePayments]) {
            InAppPurchase *inAppPurchase = [[InAppPurchase alloc] init];
            [inAppPurchase requestProUpgradeProductData];
            [inAppPurchase purchaseProUpgrade];
            [[SKPaymentQueue defaultQueue] addTransactionObserver:inAppPurchase];
        } else {
            [self purchasesDisabled];
        }
    }
}

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions {
    debug(@"Update Transaction being called");
    if ([[NSUserDefaults standardUserDefaults] boolForKey:kupgradePurchased] == YES) {
       upgrade.hidden = YES;
    }    
}

[JasonR]

You added the InAppPurchase object as your observer, but the method you want called is in MainViewController. Which way do you want it? It looks to me like you should replace inAppPurchase with self in that line. And maybe even move it to be before the InAppPurchase alloc line.

[ppn]

Thanks a lot for your help. That worked perfectly!!!