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

I'm afraid there is no other way than replacing them.

e.g.:

str =[str stringByReplacingOccurrencesOfString:@"0" withString:@"۰"];
.
.
.

Answer 2

Swift 5 and newer

if you want to make a subclass of UILabel:

class LocalizedNumbersLabel: UILabel {

override var text: String? {
    didSet {
        if let text = text {
            let numbersDictionary : Dictionary = ["0" : "۰","1" : "۱", "2" : "۲", "3" : "۳", "4" : "۴", "5" : "۵", "6" : "۶", "7" : "۷", "8" : "۸", "9" : "۹", "." : ","]
            var str = text

            for (key,value) in numbersDictionary {
                str =  str.replacingOccurrences(of: key, with: value)
            }
            if(str != self.text){
                self.text = str
            }
        } else {

        }
    }
}

}

Answer 3

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)"
    }
}

Answer 4

Swift:

From Any language, To Any Language

with the following extension, you can do it:

extension String {
    private static let formatter = NumberFormatter()

    func clippingCharacters(in characterSet: CharacterSet) -> String {
        components(separatedBy: characterSet).joined()
    }

    func convertedDigitsToLocale(_ locale: Locale = .current) -> String {
        let digits = Set(clippingCharacters(in: CharacterSet.decimalDigits.inverted))
        guard !digits.isEmpty else { return self }

        Self.formatter.locale = locale
        let maps: [(original: String, converted: String)] = digits.map {
            let original = String($0)
            guard let digit = Self.formatter.number(from: String($0)) else {
                assertionFailure("Can not convert to number from: \(original)")
                return (original, original)
            }
            guard let localized = Self.formatter.string(from: digit) else {
                assertionFailure("Can not convert to string from: \(digit)")
                return (original, original)
            }
            return (original, localized)
        }

        var converted = self
        for map in maps { converted = converted.replacingOccurrences(of: map.original, with: map.converted) }
        return converted
    }
}

---

Usage

"سلام 12345".convertedDigitsToLocale(Locale(identifier: "FA")) /* سلام ۱۲۳۴۵ */
"Hello ۱۲۳۴۵".convertedDigitsToLocale(Locale(identifier: "EN")) /* Hello 12345 */