How to round an NSDecimalNumber in swift?

Question

I can\'t find any resources on this, and I\'ve been trying all sorts of stuff, but nothing works.

According to Apple\'s documentation, you round an NSDecimalNumber l

Answer 1

NSDecimalNumberBehaviors is a protocol and thus cannot be instantiated. You need an object of a class conforming to the protocol. Apple provides the class NSDecimalNumberHandler for this purpose, e.g.:

let handler = NSDecimalNumberHandler(roundingMode: NSRoundingMode.RoundBankers, scale: 0, raiseOnExactness: false, raiseOnOverflow: false, raiseOnUnderflow: false, raiseOnDivideByZero: false)
let rounded = dec.decimalNumberByRoundingAccordingToBehavior(handler)

The scale argument is the number of decimals you want, i.e., 0 rounds to an integer.