iphone - SKPayments 完成交易调用两次

Question

我遇到了严重的问题，我正在处理应用内购买，当我第一次尝试购买时，它工作正常，第二次我的completeTransaction 调用了两次..我不知道为什么会遇到这个问题。

收到收据后，我调用我的验证方法，如果验证成功，服务器会在 http 响应中向我发送音频文件，我下载该文件，当我成功下载文件时，我调用 finishtransaction。

这是我的代码

- (void)startPurchase {
[[SKPaymentQueue defaultQueue] addTransactionObserver:self];
if([SKPaymentQueue canMakePayments]) {
    NSLog(@"IN-APP:can make payments");
    SKProductsRequest *request = [[SKProductsRequest alloc] initWithProductIdentifiers: [NSSet setWithObject:myIdentifier]];
    request.delegate = self;
      NSLog(@"** Productdata is ** %@",myIdentifier);
    [request start];

}
else {
    NSLog(@"IN-APP:can't make payments");
    loadingHUD.hidden=YES;
}
}
- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response {

NSLog(@"IN productsRequest END %d",[response.products count]);

@try {
    SKProduct *product = [response.products objectAtIndex:0];
    SKPayment *newPayment = [SKPayment paymentWithProduct:product];
    [[SKPaymentQueue defaultQueue] addPayment:newPayment];
    NSLog(@"IN-APP:productsRequest END");

    loadingHUD.hidden=YES; // Hide the Loading progress bar 

}

@catch (NSException *exception) {

    // Failed to purchase Hide the progress bar and Display Error Dialog
    loadingHUD.hidden=YES;
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"error" message:@"Errror " delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alertView show];

}
}

- (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];
        default:
            break;
    }
  }
  }
 - (void) completeTransaction: (SKPaymentTransaction *)transaction
   {
  NSLog(@"Transaction Completed");
// Finally, remove the transaction from the payment queue.
 [self verifyReceipt:transaction]; // Call the verifyReceipt method to send transaction.bytes
// [[SKPaymentQueue defaultQueue] finishTransaction: transaction];
 NSLog(@"Purchase Transaction finish");

 }

在下载成功 block 中的VerifyTransaction方法中，我调用完成事务

[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject)
 {

      [[SKPaymentQueue defaultQueue] finishTransaction: transaction]; // Finish the transaction

    // NSLog(@"Successfully downloaded file to %@",[[NSString alloc] initWithData:operation.responseData encoding:NSASCIIStringEncoding]);

     // Give alert that downloading successful.
     NSLog(@"Successfully downloaded file to %@", destPath);

    // NSLog(@"response: %@", operation.responseString);  // Give alert that downloading successful.

     // [self.target parserDidDownloadItem:destPath];

     //loadingHUD.detailsLabelText = [NSString stringWithFormat:@"%@ %i%%",@"Downloading",100];
     [loadingHUD hide:TRUE];

     [DBHelper savePurchaseId:fileName]; // save the purchase itune id into local database to populate hover image of play button on main List
     [self movieReceived];

 }

Answer 1

看起来您的观察者队列仍然包含旧的产品 ID

- (void)paymentQueue:(SKPaymentQueue *)queue removedTransactions:(NSArray *)transactions
{
    NSLog(@"Purchase removedTransactions");

    // Release the transaction observer since transaction is finished/removed.
    [[SKPaymentQueue defaultQueue] removeTransactionObserver:self];
}

完成交易后删除产品 ID。