Is there a simple way to format currency into string in iOS?

Question

I need a way to format the price from NSNumber into a string like this: \"USD 0.99\", not \"$ 0.99\".

My game uses custom fonts, and they could not have the symbols

Answer 1

SKProduct price is a NSDecimalNumber object, so one way you could do this would be to extend the NSDecimalNumber class. Here's my Swift code for this:

extension NSDecimalNumber {
    func asCurrency(locale:NSLocale) -> String? {
        var numberFormatter = NSNumberFormatter()
        numberFormatter.formatterBehavior = NSNumberFormatterBehavior.Behavior10_4
        numberFormatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle
        numberFormatter.locale = locale
        return numberFormatter.stringFromNumber(self)
    }
}

in Objective-C it would look like this:

@interface NSDecimalNumber (CurrencyExtension)

- (NSString*) asCurrency: (NSLocale *)locale;

@end

@implementation NSDecimalNumber (DellExtensions)

- (NSString*) asCurrency: (NSLocale *)locale {
    NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
    [numberFormatter setFormatterBehavior:NSNumberFormatterBehavior10_4];
    [numberFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
    [numberFormatter setLocale:product.priceLocale];
    return [numberFormatter stringFromNumber:product.price];
}

@end