See code below. Get a error of “EXC_BAD_ACCESS” when I make entries
in the GUI. Code used to work with no problems. It appears that it
is doing an illegal substraction, which I think means the objects are
not being initialized with a value of 0. At least that is my guess.
#import "MonthlyReport.h"
@implementation MonthlyReport
+ (void)initialize
{
if (self == [MonthlyReport class])
{
NSArray *keys = [NSArray arrayWithObjects: @"reportCumActualCost",
@"reportActualCost", @"reportPredictedCost",
@"reportCumPredictedCost", @"reportCumlativeInvoiceTotal",
@"reportMonthlyInvoiceAmount", nil];
[self setKeys:keys
triggerChangeNotificationsForDependentKey:@"reportCumDifference"];
[self setKeys:keys
triggerChangeNotificationsForDependentKey:@"reportCurrentDifference"];
[self setKeys:keys
triggerChangeNotificationsForDependentKey
:@"reportPercentDifferenceMonth"];
[self setKeys:keys
triggerChangeNotificationsForDependentKey
:@"reportPercentDifferenceCum"];
[self setKeys:keys
triggerChangeNotificationsForDependentKey
:@"reportInvoiceMonthlyDifference"];
[self setKeys:keys
triggerChangeNotificationsForDependentKey
:@"reportInvoiceCumlativeDifference"];
}
}
//Calculate differences
- (NSDecimalNumber *)reportCurrentDifference;
{
return [[self valueForKey:@"reportActualCost"]
decimalNumberBySubtracting: [self valueForKey:@"reportPredictedCost"]];
}
- (NSDecimalNumber *)reportCumDifference;
{
return [[self valueForKey:@"reportCumActualCost"]
decimalNumberBySubtracting: [self
valueForKey:@"reportCumPredictedCost"]];
}
- (NSDecimalNumber *)reportInvoiceMonthlyDifference;
{
return [[self valueForKey:@"reportMonthlyInvoiceAmount"]
decimalNumberBySubtracting:[self valueForKey:@"reportActualCost"]];
}
- (NSDecimalNumber *)reportInvoiceCumlativeDifference;
{
return [[self valueForKey:@"reportCumlativeInvoiceTotal"]
decimalNumberBySubtracting:[self valueForKey:@"reportCumActualCost"]];
}
//Calculate percents
- (NSDecimalNumber *)reportPercentDifferenceMonth;
{
return [[[self valueForKey:@"reportCurrentDifference"]
decimalNumberByDividingBy: [self valueForKey:@"reportPredictedCost"]]
decimalNumberByMultiplyingByPowerOf10: (short)2];
}
- (NSDecimalNumber *)reportPercentDifferenceCum;
{
return [[[self valueForKey:@"reportCumDifference"]
decimalNumberByDividingBy: [self
valueForKey:@"reportCumPredictedCost"]]
decimalNumberByMultiplyingByPowerOf10: (short)2];
}
@end
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