NSLocale Swift 3

Question

How do I get the currency symbol in Swift 3?

public class Currency: NSObject {
    public let name: String
    public let code: String
    public var symbol: String {
        return NSLocale.currentLocale().displayNameForKey(NSLocaleCurrencySymbol, value: code) ?? ""
    }

    // MARK: NSObject

    public init(name: String, code: String) {
        self.name = name
        self.code = code
        super.init()
    }
}

I know NSLocale got renamed to Locale, but displayNameForKey got removed and I only seem to be able to use localizedString(forCurrencyCode: self.code) to generate the name of the currency in the current locale without being able to get its symbol. I'm looking for a way to get a foreign currency symbol in a current locale.

Or am I overlooking something?

Alboran

Answer 1

NSLocale was not renamed, it still exists. Locale is a new type introduced in Swift 3 as a value type wrapper (compare SE-0069 Mutability and Foundation Value Types).

Apparently Locale has no displayName(forKey:value:) method, but you can always convert it to its Foundation counterpart NSLocale:

public var symbol: String {
    return (Locale.current as NSLocale).displayName(forKey: .currencySymbol, value: code) ?? ""
}

More examples:

// Dollar symbol in the german locale:
let s1 = (Locale(identifier:"de") as NSLocale).displayName(forKey: .currencySymbol, value: "USD")!
print(s1) // $

// Dollar symbol in the italian locale:
let s2 = (Locale(identifier:"it") as NSLocale).displayName(forKey: .currencySymbol, value: "USD")!
print(s2) // US$

Ibadan

Thank you this works and looks a lot neater than the solution I made by using a global Objective-C function. – Alboran

Answer 2

Locale.current.currencySymbol

The new Locale type moved most of the stringly typed properties into real properties. See the developer pages for the full list of properties.

Savarin

That only works for the currency symbol of the current locale. – Alboran

I was looking for a foreign currency symbol in the current locale. Not for a foreign currency code in a foreign locale. – Alboran

Answer 3

I use extension for Locale this is my code

extension Int {
func asLocaleCurrency(identifier: String) -> String {
    let formatter = NumberFormatter()
    formatter.numberStyle = .currency
    formatter.locale = Locale(identifier: identifier)
    return formatter.string(from: NSNumber(integerLiteral: self))!
}
}

and this for use

var priceCount = 100000
priceCount.asLocaleCurrency(identifier: "id_ID")

Atelectasis

Answer 4

For swift 3

locale.regionCode

regionsCode is similar to the displayName

Surrender

Answer 5

There is a function to get localized name of a currency code in the Locale directly no need to cast to NSLocale.

Locale(identifier: "en-GB").localizedString(forCurrencyCode: "USD") // "Us Dollar"
Locale(identifier: "pl-PL").localizedString(forCurrencyCode: "USD") // "Dolar Amerykański"

Aware