The NSFormatter for Converting English Number to persian or arabic Number in Swift 3

Question

I read the similar questions here and Write this method in my app

        let formatter = NumberFormatter()

    func convertEngNumToPersianNum(num: String)->String{
        let number = NSNumber(value: Int(num)!)
        let format = NumberFormatter()
        format.locale = Locale(identifier: "fa_IR")
        let faNumber = format.string(from: number)

        return faNumber!


    }

I didn't get Error But I didn't get the result too!

my Number code is this :

let checkNumber = Home2ViewController().customtitle.count
    personalCustom.text = ("\(checkNumber)")

I used another Number in another View Controller that works But I want to show this Number in persian or arabic number format not in English format

Cloudberry

see this my answer : https://mcmap.net/q/2029533/-ios-swift-numberformatter-decimal-style-localization – Defensive

thanks This was useful – Cloudberry

duplicate: stackoverflow.com/questions/30479225 – Satisfy

Where are you calling convertEngNumToPersianNum? – Shingly

Answer 1

Try this :

func convertEngNumToPersianNum(num: String)->String{
        //let number = NSNumber(value: Int(num)!)
        let format = NumberFormatter()
        format.locale = Locale(identifier: "fa_IR") 
        let number =   format.number(from: num)
        let faNumber = format.string(from: number!)
        return faNumber!

    }

OR repalce with your line

        let number =   format.number(from: num)
    let faNumber = format.string(from: number!)

Defensive

please help me to find similar question answer #44628482 – Cloudberry

can you elaborate what is your requirement . – Defensive

Answer 2

You can do something like,

    let formatter = NumberFormatter()
    formatter.locale = NSLocale.current   // you can specify locale that you want
    formatter.numberStyle = .decimal
    formatter.usesGroupingSeparator = true



    let number = formatter.number(from: "١٠.٠٠")

    print(number ?? "")

Kokanee

Answer 3

To convert to Arabic while keeping the leading zeros

func convertToArDigits(_ digits: String) -> String {
            // We need a CFMutableString and a CFRange:
            let cfstr = NSMutableString(string: digits) as CFMutableString
            var range = CFRange(location: 0, length: CFStringGetLength(cfstr))
            // Do the transliteration (this mutates `cfstr`):
            CFStringTransform(cfstr, &range, kCFStringTransformLatinArabic, false)
            // Convert result back to a Swift string:
            return (cfstr as String)
        }

Ottoman

Answer 4

   extension String {
public var faToEnDigits : String {
    let farsiNumbers = ["٠": "0","١": "1","٢": "2","٣": "3","٤": "4","٥": "5","٦": "6","٧": "7","٨": "8","٩": "9"]
    var txt = self
    farsiNumbers.map { txt = txt.replacingOccurrences(of: $0, with: $1)}
    return txt
}
public var enToFaDigits : String {
    let englishNumbers = ["0": "۰","1": "۱","2": "۲","3": "۳","4": "۴","5": "۵","6": "۶","7": "۷","8": "۸","9": "۹"]
    var txt = self
    englishNumbers.map { txt = txt.replacingOccurrences(of: $0, with: $1)}
    return txt
}
}

Akeylah

The digits you have used in your third line (faToEnDigits), are Arabic digits, not Persian, where those in enToFaDigits are actually Persian. This creates inconsistency in your code and conversion process. – Lowspirited

@Lowspirited thanks for your comment but about digits Persian history is older than Arabic and math move from Persian empire to Arabic region. – Akeylah

So, what’s your point? “۴۵۶” vs. “٤٥٦” are 6 different unicode characters, the former three are for fa_IR, where the latter are for ar_AR. This has nothing to do to Persian Empire. In fact they used cuneiform which is an extinct ancient language. – Lowspirited

@Lowspirited 6 has two form(۶ and ٦) in IR-FA and i put both of them to show there aren't different between them – Akeylah

Well, that is exactly the mistake I'm attempting to point out. They are indeed different. The former is U+06F6, the latter is U+0666. You can read more about that here: en.wikipedia.org/wiki/… . You can also google them (or any other similar string like ی ک vs. ي ك in double quotations to see the different search results. (كيك كي vs. کیک کی) are actually different. This misuse of wrong characters impacts things like hashtag trends, etc. – Lowspirited