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

convert number to any locale

let formatter = NumberFormatter()
formatter.locale = Locale(identifier: "ar")
if let localized = formatter.string(from: NSNumber(value: comp.0)) {
   return "\(localized)"
}

example:

(lldb) po formatter.string(from: NSNumber(value: 0)) ▿ Optional - some : "٠"

(lldb) po formatter.string(from: NSNumber(value: 1)) ▿ Optional - some : "١"

(lldb) po formatter.string(from: NSNumber(value: 2)) ▿ Optional - some : "٢"

(lldb) po formatter.string(from: NSNumber(value: 3)) ▿ Optional - some : "٣"

(lldb) po formatter.string(from: NSNumber(value: 4)) ▿ Optional - some : "٤"

(lldb) po formatter.string(from: NSNumber(value: 5)) ▿ Optional - some : "٥"

(lldb) po formatter.string(from: NSNumber(value: 6)) ▿ Optional - some : "٦"

(lldb) po formatter.string(from: NSNumber(value: 7)) ▿ Optional - some : "٧"

(lldb) po formatter.string(from: NSNumber(value: 8)) ▿ Optional - some : "٨"

(lldb) po formatter.string(from: NSNumber(value: 9)) ▿ Optional - some : "٩"

(lldb) po formatter.string(from: NSNumber(value: 10)) ▿ Optional - some : "١٠"