问题
Which objective-c type is appropriate for handling money? I need something which is Core Data compatible.
回答1:
There are two solutions:
- Use an
int, and always keep track of monetary values in cents (or the smallest possible division of whatever currency you're using). Use only integer calculations. - Use NSDecimalNumber, which does exact decimal arithmetic.
Solution #1 requires you to convert between cents and dollars whenever you do input or output of monetary values, whereas solution #2 can be messier to code (e.g. you have to write something like [num1 decimalNumberByAdding:num2] instead of num1 + num2 to add two numbers).
I'd recommend solution #1, but go with whichever of those you think would work best.
来源：https://stackoverflow.com/questions/6339120/which-objective-c-type-is-appropriate-for-handling-money