Question

我的实时应用程序发生了崩溃，发生在以下代码中：

- (void)setUpProgressForAmount:(NSDecimalNumber*)amountValue forProgressView:(UIProgressView*)progressView overUnderLabel:(UILabel*)overUnderLabel forTextLabel:(UILabel*)textLabel  {

    __ENTERING_METHOD__
    NSString *amountLeftString = nil;
    NSDecimalNumber *amountLeftValue = [budgetedAmount decimalNumberBySubtracting:amountValue];
    if ([amountLeftValue compare:[NSDecimalNumber zero]] == NSOrderedAscending) {
        //make it a positive amount if a negative amount
        amountLeftValue = [[NSDecimalNumber zero] decimalNumberBySubtracting: amountLeftValue];
    }
    amountLeftString = (NSString *)[[[ObjectsHelper sharedManager] currencyFormatter] stringFromNumber:amountLeftValue];

    NSDecimalNumber *amountProgress;
    NSString *overUnderString = nil;
    if ([budgetedAmount compare:[NSDecimalNumber zero]] == NSOrderedDescending) {

        [overUnderLabel setHidden:NO];

        amountProgress = [amountValue decimalNumberByDividingBy:budgetedAmount];

        [progressView setHidden:NO];
        progressView.trackTintColor = [UIColor colorWithWhite:0 alpha:.05];
        progressView.progress = [amountProgress doubleValue];

        if ([amountProgress doubleValue] > 1.0) {
            [progressView setProgressTintColor:[[MyTheme sharedTheme] defaultRedColor]];
            overUnderString = [NSString stringWithFormat:@"%@ %@",amountLeftString,NSLocalizedString(@"over", @"over")];
            [overUnderLabel setTextColor:[[MyTheme sharedTheme] defaultRedColor]];
        }
        else {
            [progressView setProgressTintColor:[[MyTheme sharedTheme] defaultGreenColor]];
            overUnderString = [NSString stringWithFormat:@"%@ %@",amountLeftString,NSLocalizedString(@"under", @"under")];
            [overUnderLabel setTextColor:[[MyTheme sharedTheme] defaultGreenColor]];
        }
        overUnderLabel.text = overUnderString;
    }
    else {

        [overUnderLabel setHidden:NO];
        [overUnderLabel setText:@""];

        [progressView setHidden:NO];

        progressView.progress = 0;
    }
}

它发生在以下行：

NSDecimalNumber *amountLeftValue = [budgetedAmount decimalNumberBySubtracting:amountValue];

崩溃的原因是：

*** Terminating app due to uncaught exception 'NSDecimalNumberOverflowException', reason: 'NSDecimalNumber overflow exception'

我之前从未见过这个错误，并且没有太多文档。至少到目前为止，我无法重现错误。

在代码中，budgetedAmount也是一个NSDecimalNumber，从这些方法之一的返回值设置（我不知道这次崩溃中的哪一个）：

+ (NSDecimalNumber*)getBudgetAmountDecimalForBudgetAmountNumber:(NSNumber*)amtBudgetedInt canRound:(BOOL)canRound {

    __ENTERING_METHOD__
    NSDecimalNumber *budgetedAmountDecimalNumber = [NSDecimalNumber zero];
    if([amtBudgetedInt integerValue] > 0){

        budgetedAmountDecimalNumber = [NSDecimalNumber decimalNumberWithMantissa:[amtBudgetedInt integerValue] exponent:(0-[[[ObjectsHelper sharedManager] currencyScale] integerValue]) isNegative:NO];

        if (canRound && [[[NSUserDefaults standardUserDefaults] objectForKey:kRoundAmounts] integerValue] != 0) { //not rounding (rounding is zero)
            budgetedAmountDecimalNumber = [NSDecimalNumber decimalNumberWithString:[[[ObjectsHelper sharedManager] roundingFormatter] stringFromNumber:budgetedAmountDecimalNumber]];
        }
    }
    return budgetedAmountDecimalNumber;
}

+ (NSArray*)getCalcBudgetAmountCanRound:(BOOL)canRound {

    __ENTERING_METHOD__
    NSDecimalNumber *calcBudgetedAmountDecimalNumber = [NSDecimalNumber zero];
    NSInteger calcBudgetedAmountInt = 0;

    for (Person *person in persons) {

            NSNumber *personBudgetNumber = person.amtBudgetedInt;//NSNumber - numberWithInt

            if ([personBudgetNumber integerValue] > 0) {

                calcBudgetedAmountInt += [personBudgetNumber integerValue];
                NSDecimalNumber *personBudget = [NSDecimalNumber decimalNumberWithMantissa:[personBudgetNumber integerValue] exponent:(0-[[[ObjectsHelper sharedManager] currencyScale] integerValue]) isNegative:NO];

                if (canRound && [[[NSUserDefaults standardUserDefaults] objectForKey:kRoundAmounts] integerValue] != 0) {

                    calcBudgetedAmountDecimalNumber = [calcBudgetedAmountDecimalNumber decimalNumberByAdding:[NSDecimalNumber decimalNumberWithString:[[[ObjectsHelper sharedManager] roundingFormatter] stringFromNumber:personBudget]]];
                }
                else {
                    calcBudgetedAmountDecimalNumber = [calcBudgetedAmountDecimalNumber decimalNumberByAdding:personBudget];
                }
            }
        }
    }
    NSNumber *calcBudgetedAmountNumber = [NSNumber numberWithInteger:calcBudgetedAmountInt];
    return @[calcBudgetedAmountDecimalNumber,calcBudgetedAmountNumber];
}

我知道我可以调试这个，如果它发生在我自己的设备或模拟器上，但我无法从我拥有的数据中做到这一点，特别是因为我试图重现错误而不能

有人可以为我揭示这种情况，还是指出我正确的方向？感谢。

此处是崩溃报告的相关部分：

Exception Type:  SIGABRT
Exception Codes: #0 at 0x38d331fc
Crashed Thread:  0

Application Specific Information:
*** Terminating app due to uncaught exception 'NSDecimalNumberOverflowException', reason: 'NSDecimalNumber overflow exception'

Last Exception Backtrace:
0   CoreFoundation                       0x2e333f4b __exceptionPreprocess + 131
1   libobjc.A.dylib                      0x387746af objc_exception_throw + 38
2   CoreFoundation                       0x2e333e8d -[NSException initWithCoder:] + 0
3   Foundation                           0x2ed2c6bd -[NSDecimalNumberHandler exceptionDuringOperation:error:leftOperand:rightOperand:] + 228
4   Foundation                           0x2ed2b715 _checkErrorAndRound + 93
5   Foundation                           0x2ed2b8a1 -[NSDecimalNumber decimalNumberBySubtracting:withBehavior:] + 116
6   MyApp                          0x000b2cbb -[MyDetailViewController(Budget) setUpProgressForAmount:forProgressView:overUnderLabel:forTextLabel:] (MyDetailViewController+Budget.m:531)

Objective C - NSDecimalNumber溢出异常错误

0 个答案: