如何在PKPaymentRequest（ApplePay）中使用applicationData？

Question

我想在Apple Pay上设置传递变量，我将NSDictionary设置为 JSON 数据，如：

PKPaymentRequest *request = [[PKPaymentRequest alloc] init];
[request setApplicationData:[NSJSONSerialization dataWithJSONObject:@{@"name":@"USER_NAME"} options:NSJSONWritingPrettyPrinted error:nil]];

现在在里面：

- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller didAuthorizePayment:(PKPayment *)payment completion:(void (^)(PKPaymentAuthorizationStatus status))completion;

我能够以

的形式访问applicationData

NSError* jsonError;
NSDictionary* dataDict = [NSJSONSerialization JSONObjectWithData:payment.token.paymentData options:kNilOptions error:&jsonError];

dataDict [@“header”] [@“applicationData”] 包含应用程序数据

但数据已编码，我想从applicationData获取@{@"name":@"USER_NAME"}。