in app purchase resets HELP PLZ

[iAppDev]

ok so I got to make in app purchase for my app and it all works and unlocks the features that i want, but the sucky part is that whenever i get out of the main view (view1) and load another view(view2), when i come back to main view (view1), the stupid in app purchase is locked again.
the only way i can reunlock it is if i purchase it again. of course it says it's free download.

how can i make it so that when the app loads or comes from another view, it should be unlocked already if previously purchased (and i don't mean if the app is redownload it, just when it comes from another view).

thanks in advance guys.

here's my codes that i have

//the action that unlocks it and is set hidden after purchase
-(IBAction)purchaseAction{
    
    SKPayment *payment = [SKPayment paymentWithProductIdentifier:@"partypack03"];
    [[SKPaymentQueue defaultQueue] addTransactionObserver:self];
    [[SKPaymentQueue defaultQueue] addPayment:payment];
    
}

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response{
    SKProduct *validProduct = nil;
    int count = [response.products count];
    if (count > 0) {
        validProduct = [response.products objectAtIndex:0];
    }
    else if (!validProduct){
        NSLog(@"no in app purchase available");
    }
    
}


- (void) paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions {
    for (SKPaymentTransaction *transaction in transactions) {
        switch (transaction.transactionState) {
            case SKPaymentTransactionStatePurchasing:
                NSLog(@"purchaseding");

                break;
            case SKPaymentTransactionStatePurchased:
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];

                purchased3player.hidden = YES;
                purchased4player.hidden = YES;
                
                NSLog(@"purchased show unlock");
                

                break;
                
            case SKPaymentTransactionStateRestored:
                NSLog(@"stay unlock after reset");
                purchased3player.hidden = YES;
                purchased4player.hidden = YES;


                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];

                break;
                
            case SKPaymentTransactionStateFailed:
                if (transaction.error.code != SKErrorPaymentCancelled) {
                    NSLog(@"payment error");
                }
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];

                break;
        }
        if (transaction.transactionState != SKPaymentTransactionStatePurchasing) {
            [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
        }

    }
}

//inside the viewDidLoad
    //load in app purchase
    if ([SKPaymentQueue canMakePayments])
    {
        // Display a store to the user.
        NSLog(@"parental control Disabled. You can purchase");
        SKProductsRequest *productsRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:[NSSet setWithObject:@"com.appstreetboys.AlmaDesnudaSpecialEdition"]];
        productsRequest.delegate = self;
        [productsRequest start];
        
    }
    else
    {
        // Warn the user that purchases are disabled.
        NSLog(@"parental control enabled. You can't purchase");
    }

[baja_yu]

You need to record somehow (NSUserDefaults) for example that the item has been purchased and the first check if this record exists. If it does, provide the functionality, if not, show the screen to purchase. NSUserDefaults isn't the most secure way to store this, but if you aren't worried about piracy too much it'll do.

[iAppDev]

how do i use the NSUserDefault? i have no idea. please help if you know or where do i need to implement it. thanks

EDIT: lol sorry i know how to use that feature but is there any other way for me to implement that if a in app purchase has been purchased and the app is restarted or coming from another view, it should still be unlocked. thanks

[Domele]

You should look at MKStoreKit, everything is already built and waiting for you to use.