IAP收据数据对于某些购买返回为空

Question

我正在使用MKStoreKit，并且在我的应用程序中观察了几个月的异常情况。一些用户开始向我发送消息，说他们的购买未完成。但是我做销售。

自4月以来，purchase_error_7和purchase_error_6都被调用了624次以上。

purchase_error_7在这里：

- (void)startValidatingReceiptsAndUpdateLocalStore {
  [self startValidatingAppStoreReceiptWithCompletionHandler:^(NSArray *receipts, NSError *error) {
    if (error) {
      NSLog(@"Receipt validation failed with error: %@", error);
      [[NSNotificationCenter defaultCenter] postNotificationName:kMKStoreKitReceiptValidationFailedNotification object:error];

        NSUInteger characterCount = [error.localizedDescription length];
        if (characterCount > 80) {
            characterCount = 80;
        }
        [FIRAnalytics logEventWithName:@"purchase_error_7"
                            parameters:@{
                                         @"name": [error.localizedDescription substringToIndex:characterCount],
                                         @"full_text": [[NSUserDefaults standardUserDefaults] stringForKey:@"UserDefaultID"]
                                         }];

    } else {
      __block BOOL purchaseRecordDirty = NO;
      [receipts enumerateObjectsUsingBlock:^(NSDictionary *receiptDictionary, NSUInteger idx, BOOL *stop) {
        NSString *productIdentifier = receiptDictionary[@"product_id"];
        NSNumber *expiresDateMs = receiptDictionary[@"expires_date_ms"];
        if (expiresDateMs) { // renewable subscription
          NSNumber *previouslyStoredExpiresDateMs = self.purchaseRecord[productIdentifier];
          if (!previouslyStoredExpiresDateMs ||
              [previouslyStoredExpiresDateMs isKindOfClass:NSNull.class]) {
            self.purchaseRecord[productIdentifier] = expiresDateMs;
            purchaseRecordDirty = YES;
          } else {
            if ([expiresDateMs doubleValue] > [previouslyStoredExpiresDateMs doubleValue]) {
              self.purchaseRecord[productIdentifier] = expiresDateMs;
              purchaseRecordDirty = YES;
            }
          }
        }
      }];

      if (purchaseRecordDirty) {
        [self savePurchaseRecord];
      }

      [self.purchaseRecord enumerateKeysAndObjectsUsingBlock:^(NSString *productIdentifier, NSNumber *expiresDateMs, BOOL *stop) {
        if (![expiresDateMs isKindOfClass: [NSNull class]]) {
          if ([[NSDate date] timeIntervalSince1970] > [expiresDateMs doubleValue]) {
            [[NSNotificationCenter defaultCenter] postNotificationName:kMKStoreKitSubscriptionExpiredNotification object:productIdentifier];
          }
        }
      }];
    }
  }];
}

purchase_error_6在这里：

- (void)startValidatingAppStoreReceiptWithCompletionHandler:(void (^)(NSArray *receipts, NSError *error)) completionHandler {
  NSURL *receiptURL = [[NSBundle mainBundle] appStoreReceiptURL];
  NSError *receiptError;
  BOOL isPresent = [receiptURL checkResourceIsReachableAndReturnError:&receiptError];
  if (!isPresent) {
    // No receipt - In App Purchase was never initiated
    completionHandler(nil, nil);
    return;
  }

  NSData *receiptData = [NSData dataWithContentsOfURL:receiptURL];
  if (!receiptData) {
    // Validation fails
    NSLog(@"Receipt exists but there is no data available. Try refreshing the reciept payload and then checking again.");
      completionHandler(nil, nil);
    return;
  }

  NSError *error;
  NSMutableDictionary *requestContents = [NSMutableDictionary dictionaryWithObject:
                                          [receiptData base64EncodedStringWithOptions:0] forKey:@"receipt-data"];
  NSString *sharedSecret = [MKStoreKit configs][@"SharedSecret"];
  if (sharedSecret) requestContents[@"password"] = sharedSecret;

  NSData *requestData = [NSJSONSerialization dataWithJSONObject:requestContents options:0 error:&error];

#ifdef DEBUG
  NSMutableURLRequest *storeRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:kSandboxServer]];
#else
  NSMutableURLRequest *storeRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:kLiveServer]];
#endif

  [storeRequest setHTTPMethod:@"POST"];
  [storeRequest setHTTPBody:requestData];

  NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

  [[session dataTaskWithRequest:storeRequest completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    if (!error) {
      NSDictionary *jsonResponse = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
      NSInteger status = [jsonResponse[@"status"] integerValue];

      if (jsonResponse[@"receipt"] != [NSNull null]) {
        NSString *originalAppVersion = jsonResponse[@"receipt"][@"original_application_version"];
        if (nil != originalAppVersion) {
          [self.purchaseRecord setObject:originalAppVersion forKey:kOriginalAppVersionKey];
          [self savePurchaseRecord];
        }
        else {
          completionHandler(nil, nil);
        }
      }
      else {
        completionHandler(nil, nil);
      }

      if (status != 0) {
        NSError *error = [NSError errorWithDomain:@"com.mugunthkumar.mkstorekit" code:status
                                         userInfo:@{NSLocalizedDescriptionKey : errorDictionary[@(status)]}];
        completionHandler(nil, error);
      } else {
        NSMutableArray *receipts = [jsonResponse[@"latest_receipt_info"] mutableCopy];
        if (jsonResponse[@"receipt"] != [NSNull null]) {
        NSArray *inAppReceipts = jsonResponse[@"receipt"][@"in_app"];
        [receipts addObjectsFromArray:inAppReceipts];
        completionHandler(receipts, nil);
        } else {
          completionHandler(nil, nil);
        }
      }
    } else {

        NSUInteger characterCount = [error.localizedDescription length];
        if (characterCount > 80) {
            characterCount = 80;
        }
        [FIRAnalytics logEventWithName:@"purchase_error_6"
                            parameters:@{
                                         @"name": [error.localizedDescription substringToIndex:characterCount],
                                         @"full_text": [[NSUserDefaults standardUserDefaults] stringForKey:@"UserDefaultID"]
                                         }];

      completionHandler(nil, error);
    }
  }] resume];
}