哪种Objective-C类型适合处理资金？ [英] Which objective-c type is appropriate for handling money?

问题描述

哪种objective-c类型适合处理货币？我需要与Core Data兼容的东西。

Which objective-c type is appropriate for handling money? I need something which is Core Data compatible.

推荐答案

有两种解决方案：

• 使用 int ，并始终以美分（或所用任何货币的最小除法）跟踪货币价值。仅使用整数计算。


• 使用 NSDecimalNumber ，它执行精确的十进制算术。

• 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.

解决方案＃1要求您在输入或输出货币值时都在美分和美元之间进行转换，而解决方案＃2可能更难以编写代码（例如，您必须编写类似 [num1 decimalNumberByAdding：num2] 而不是 num1 + num2 来添加两个数字）。

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).

我建议使用解决方案＃1，但是请选择您认为最有效的解决方案。

I'd recommend solution #1, but go with whichever of those you think would work best.

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