在不同区域的CoreData中保存小数是截断小数

Question

我的语言和区域设置为'en_US'，我可以在核心数据中保存十进制数：0.55，并在加载时检索正确的值。

如果我将我的区域更改为'en_PT'，即测试货币金额的格式，则保存相同的数字0,55将向上舍入为'0'

我在模拟器和设备上测试了这个，我看到了相同的行为。 coreData模型中的'amount'字段是'Decimal'。我在CoreData中需要做些什么来支持这个吗？

以下是我的代码的不同部分...保存到coreData

-(void)addPayment:(Payment*)payment withContext:(NSManagedObjectContext *)context onSuccess:(SuccessBlock)successBlock onFailed:(FailedBlock)failedBlock
{
   CDPayments* cdPayment = [NSEntityDescription insertNewObjectForEntityForName:PAYMENTS_TABLE
                                                                          inManagedObjectContext:context];
   [self copyPayment:payment intoCDPayment:cdPayment];
   [self saveDataInContext:context onSuccess:successBlock onError:failedBlock];
}

从coreData中检索

-(void) listOfPaymentsWithFilter:(NSPredicate*)predicate onSuccess:(SuccessNSArrayBlock)successBlock onFailed:(FailedBlock)failedBlock
{
    [self listOfAllObjectsForEntity:EntityTypePayments filterWith:predicate sortBy:nil
      onSuccess:^(NSArray *array)
             {
                 NSMutableArray *paymentsList = [[NSMutableArray alloc] init];

                 for (CDPayments* cdPayment in array)
                 {
                     Payment* tmpPayment = [[Payment alloc] init];
                     [self copyPayment:tmpPayment fromCDPayment:cdPayment];
                     [paymentsList addObject:tmpPayment];
                 }

                 successBlock(paymentsList);
             }
        onError:failedBlock];
}

将用户输入金额从文本字段转换为NSDecimal数字

+(NSDecimalNumber*) decimalNumberFromUserEnteredString:(NSString*)string
{
    NSNumber *number = [[NSNumberFormatter cachedAmountFormatter] numberFromString:string];
    NSDecimalNumber *decimalNumber = [NSDecimalNumber decimalNumberWithDecimal:[number decimalValue]];;

    return decimalNumber;
}

这是格式化程序......

+(NSNumberFormatter*) cachedAmountFormatter
{
    if (cachedNumberFormatter == nil)
    {        
        cachedNumberFormatter = [[NSNumberFormatter alloc] init];
        cachedNumberFormatter.numberStyle = NSNumberFormatterCurrencyStyle;
        cachedNumberFormatter.lenient = YES;
        cachedNumberFormatter.minimumFractionDigits = 2;
        cachedNumberFormatter.maximumFractionDigits = 2;
        cachedNumberFormatter.locale = [NSLocale currentLocale];
    }

    return cachedNumberFormatter;
}