In-app-purchase logic in spritekit - ios

Question

i made a game in sprite kit i thought to make full and lite one instead i made in-app purchase i thought its easy with one target, my idea is users can play upto 99 points and if they want to play rest of the game they have to buy , as i made 2 scenes 1) mainmenu scene 2) playscene i have buttons for IAP and restore in both scenes and even while users playing at 99 point i add this code.if this way is wrong which is the best way to approach please let me know as this is my first sprite kit app
if (_gameScore==99){
//added this code in buy button as well
BOOL isInappSuccess = [[NSUserDefaults standardUserDefaults] boolForKey:#"IsInAppComplete"];
if (!isInappSuccess) {
//[SVProgressHUD showWithStatus:#"Loading..." maskType:SVProgressHUDMaskTypeGradient];
[[InAppRageIAPHelper sharedHelper] buyProductIdentifier:INAPP_PRODUCT_ADV];
}
else
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"InApp" message:#"Item Already Purchased" delegate:Nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
}
}

Answer 1

//for non-consumable product you have to add following code in your application
//function checks whether user purchase a non-consumable or not
/*
change all function acc to your game
*/
-(void)setDone:(Boolean)status
{
[_urnsuserDefault setBool:status forKey:#“done];
[_urnsuserDefault synchronize];
}
-(Boolean)getDone
{
Boolean status=[_urnsuserDefault boolForKey:#"done"];
return status;
}
//if user already purchase non-consumable or not (check for Restore if user purchase non-consumable product);
-(void)checkForRestore
{
if([self getDone])
{
//if user successfully purchase a in app item
UIAlertView *productAlertPur = [[UIAlertView alloc]
initWithTitle:#"Restored"
message:#“your” msg
delegate:nil
cancelButtonTitle:nil
otherButtonTitles:#"Ok", nil];
[productAlertPur show];
}
else
{
[[SKPaymentQueue defaultQueue] addTransactionObserver:self];
[[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
}
}
-(void)paymentQueue:(SKPaymentQueue *)queue restoreCompletedTransactionsFailedWithError:(NSError *)error
{
UIAlertView * removedAlert = [[UIAlertView alloc]
initWithTitle:nil message:[NSString stringWithFormat:#"Restoration failed as %#.",error.localizedDescription] delegate:nil cancelButtonTitle:#"Ok" otherButtonTitles:nil];
[removedAlert show];
}
- (void) paymentQueueRestoreCompletedTransactionsFinished:(SKPaymentQueue *)queue
{
purchasedItemIDs = [[NSMutableArray alloc] init];
if(queue.transactions.count==0){
UIAlertView *noproductAlert = [[UIAlertView alloc]
initWithTitle:#"Restored"
message:#"No Purchases to Restore"
delegate:nil
cancelButtonTitle:nil
otherButtonTitles:#"Ok", nil];
[noproductAlert show];
}
else{
if(![self getDone])
{
NSString *productID = #“company.game.productid;
[purchasedItemIDs addObject:productID];
UIAlertView *restoredAlert = [[UIAlertView alloc]
initWithTitle:#"Restored"
message:[NSString stringWithFormat:#"Math Lab Restored successfully."]
delegate:nil
cancelButtonTitle:nil
otherButtonTitles:#"Ok", nil];
[restoredAlert show];
[self viewWillAppear:YES];
[self setDone:TRUE];
}
}
}