NSNumberFormatter Currency Without Symbol?

Question

I am using NSNumberFormatter to get a currency value from a string and it works well.

I use this code to do so:

NSNumberFormatter *nf = [[NSNumberFormatter alloc] init];     [nf setNumberStyle:NSNumberFormatterCurrencyStyle];     NSString *price = [nf stringFromNumber:[NSNumber numberWithFloat:[textField.text floatValue]]]; 

However, it always gives me a currency symbol at the start of the string. Rather than doing it manually form my given string, can I not somehow have the formatter not give the string any currency symbol?

Answer 1

Yes, after you set the style, you can tweak specific aspects:

NSNumberFormatter *nf = [[NSNumberFormatter alloc] init]; [nf setNumberStyle:NSNumberFormatterCurrencyStyle]; [nf setCurrencySymbol:@""]; // <-- this NSDecimalNumber* number = [NSDecimalNumber decimalNumberWithString:[textField text]]; NSString *price = [nf stringFromNumber:number]; 

Just as some advice, you should probably use a number formatter to read the string value, especially if a user is entering it (as suggested by your code). In this case, if the user enters locale-specific formatting text, the generic -floatValue and -doubleValue type methods won't give you truncated numbers. Also, you should probably use -doubleValue to convert to a floating point number from user-entered text that's a currency. There's more information about this in the WWDC'12 developer session video on internationalization.

Edit: Used an NSDecimalNumber in the example code to represent the number the user enters. It's still not doing proper validation, but better than the original code. Thanks @Mark!

Answer 2

With Swift 5, NumberFormatter has a property called currencySymbol. currencySymbol has the following declaration:

var currencySymbol: String! { get set } 

The string used by the receiver as a local currency symbol.

Therefore, if required for your formatting style, you can set this property to an empty String.

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The following Playground sample code shows how to set your currency formatting style with an empty symbol:

import Foundation  let amount = 12000  let formatter = NumberFormatter() formatter.numberStyle = NumberFormatter.Style.currency formatter.currencySymbol = "" formatter.locale = Locale(identifier: "en_US") // set only if necessary  let result = formatter.string(for: amount) print(String(describing: result)) // prints: Optional("12,000.00")