In app purchase unfinished transaction in a particular device - ios

Question

Im doing a in app purchase non consumable,the issue is when I start the app there comes a alert view filled with a mail address already and asking password.This particular issue happens only in the same device which I test where else it never happened when I tested in other device.
Somewhere I have to place this [[SKPaymentQueue defaultQueue] finishTransaction:transaction]; to get that unfinished transaction done but I'm completely confused because I've placed in necessary places .This is my existing code
-(void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions {
for (SKPaymentTransaction *transaction in transactions) {
switch (transaction.transactionState) {
case SKPaymentTransactionStatePurchased:
[self UnlockPurchase];
[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
break;
case SKPaymentTransactionStateRestored:
NSLog(#"Restored ");
[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
break;
case SKPaymentTransactionStateFailed:NSLog(#"Transaction Failed");
[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
default:
break;
}
}
- (IBAction)Restore:(id)sender {
[[SKPaymentQueue defaultQueue] addTransactionObserver:self];
[[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
}
-(void)paymentQueueRestoreCompletedTransactionsFinished:(SKPaymentQueue *)queue {
[self UnlockPurchase];
}
- (IBAction)BuyProduct:(id)sender {
SKPayment *payment = [SKPayment paymentWithProduct:_product];
[[SKPaymentQueue defaultQueue] addPayment:payment];
}
Similar problem I had previously on another device just because I left out [[SKPaymentQueue defaultQueue] finishTransaction:transaction]in SKPaymentTransactionStateRestoredthen my problem was solved.When I used this test user to restore the purchase,it restores without entering into SKPaymentTransactionStateRestored case.When I try to purchase again it says you've already purchased item but hasn't been downloaded.Now I need is to get rid of that login containing a email address filled already pops up when I start? HELP !

Answer 1

You are missing the methods that handle the response of the app store to your application. They should be in your app delegate:
Follow apples documentation for delivering products:
https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/StoreKitGuide/Chapters/DeliverProduct.html#//apple_ref/doc/uid/TP40008267-CH5-SW3
Alternatively you can use ray wenderlichs tutorial:
http://www.raywenderlich.com/21081/
Take notice that these methods are the ones that should control the content delivery, for the purchase being successful or not.