Objective-C: How to format string as $ Price

Question

Is their a built-in way of formatting string as $ price, e.g. 12345.45 converted to $12,345.45?

Answer 1

Assuming you are using Cocoa (or just Foundation), you can use NSNumberFormatter and set its style to currency:

NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle:NSNumberFormatterCurrencyStyle];
... = [formatter stringFromNumber:number];

By default it uses the locale of your system, but you can change that and lots of other properties, see the NSNumberFormatter API docs.

Answer 2

Assuming the price is held in a float, you probably want +localizedStringWithFormat:.

NSString *priceString = [NSString localizedStringWithFormat:@"$ %'.2f",price];

Hmmm... Apple says they follow the IEEE standard for printf, so it should accept the ' flag, but it doesn't work on Tiger. NSNumberFormatter it is.