How to convert english numbers inside a string to Persian/Arabic numbers in Objective-C?

Question

I have an english string that may or may not have numbers. But i want those numbers to be printed on screen as Persian numbers.

For example if NSString *foo =

Answer 1

In swift 5

func getNumerals(num: Int) -> String {
    if getLanguage() == "ar" // You can set locale of your language
    {  
        let number = NSNumber(value: num)
        let format = NumberFormatter()
        format.locale = Locale(identifier: "ar") // You can set locale of your language
        let formatedNumber = format.string(from: number)
        return formatedNumber!
    } else {
        return "\(num)"
    }
}