在应用程序购买完成后可能会收到通知吗？

Question

我想知道，有没有办法在应用程序购买完成时注册通知？ IE购买还是恢复失败或成功？我想处理这四种情况，以便我可以在应用程序购买发生的视图控制器中向用户显示警报。有谁知道如何做到这一点？

Answer 1

（void）paymentQueue：updatedTransactions：在事务状态更新时调用。您可以在完成交易时显示警报窗口。

- (void) purchaseItem:(SKProduct *) item 
{ 
    NSLog(@"Purchasing item %@", item.localizedTitle); 
    SKPayment *payment = [SKPayment paymentWithProduct:item]; 
    [[SKPaymentQueue defaultQueue] addPayment:payment]; 
} 

- (void) paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions 
{ 
    for (SKPaymentTransaction *transaction in transactions) 
    { 
     switch (transaction.transactionState) 
     { 
      case SKPaymentTransactionStatePurchased: 
       [self completeTransaction:transaction]; 
       break; 
      case SKPaymentTransactionStateFailed: 
       [self failedTransaction:transaction]; 
       break; 
      case SKPaymentTransactionStateRestored: 
       [self restoreTransaction:transaction]; 
       break; 
      default: 
       break; 
     } 
    } 
} 

- (void) completeTransaction:(SKPaymentTransaction *) transaction 
{ 
    [[SKPaymentQueue defaultQueue] finishTransaction:transaction]; 
    UIAlertView *message = [[UIAlertView alloc] initWithTitle:@"Transaction" 
               message:@"Your purchase is complete" 
               delegate:nil 
             cancelButtonTitle:@"OK" 
             otherButtonTitles:nil]; 
    [message show]; 

    // or 

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(finishTransactionSuccessfully:) name:PURCHASE_NOTE object:nil]; 
}