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 for all the available App Store currencies like GBP. So I think it's better to roll-back to string representation of currency.

The method used should be absolutely OK for any currency that App Store supports.

Answer 1

If you want it localized (ie the currency on the correct side of the price) it is a bit of a hassle.

NSDecimalNumber *price = [NSDecimalNumber decimalNumberWithString:@"1.99"];
NSLocale *priceLocale = [[[NSLocale alloc] initWithLocaleIdentifier:@"de_DE"] autorelease]; // get the locale from your SKProduct

NSNumberFormatter *currencyFormatter = [[[NSNumberFormatter alloc] init] autorelease];
[currencyFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
[currencyFormatter setLocale:priceLocale];
NSString *currencyString = [currencyFormatter internationalCurrencySymbol]; // EUR, GBP, USD...
NSString *format = [currencyFormatter positiveFormat];
format = [format stringByReplacingOccurrencesOfString:@"¤" withString:currencyString];
    // ¤ is a placeholder for the currency symbol
[currencyFormatter setPositiveFormat:format];

NSString *formattedCurrency = [currencyFormatter stringFromNumber:price];

You have to use the locale you get from the SKProduct. Don't use [NSLocale currentLocale]!

Answer 2

The – productsRequest:didReceiveResponse: method gives you back a list of SKProducts.

Each product contains a property priceLocale which contains the local currency of the product for the current user.

You could use the following sample code (apple's) to format it:

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setFormatterBehavior:NSNumberFormatterBehavior10_4];
[numberFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
[numberFormatter setLocale:product.priceLocale];
NSString *formattedString = [numberFormatter stringFromNumber:product.price];

Good luck!