Question

Man the simplest stuff always seems so crazy in Objective-C to me, anyways I need to do some basic subtraction and multiplication and am stumped.

I have:

client.PricingDiscount <-- this is an Integer 16 property on a CoreData NSManagedObject
sku.RetailPrice <-- this is a Decimal property on a CoreData NSManagedObject

I am simply trying to get a NSDecimalNumber to display like so:

NSDecimalNumber *showPrice = sku.RetailPrice * (100 - client.PricingDiscount);

I have tried a bunch of different forms of this and cannot figure out what the hell I am doing wrong here.

Answer 1

Standard operators cannot be used with NSDecimalNumber

NSDecimalNumber *one = [NSDecimalNumber decimalNumberWithDecimal:[[NSNumber numberWithInt:100] decimalValue]]; 
NSDecimalNumber *factor = [one decimalNumberBySubtracting:[NSDecimalNumber decimalNumberWithDecimal:[client.PricingDiscount decimalValue]]];
NSDecimalNumber *showPrice = [sku.RetailPrice decimalNumerByMultiplying:factor];