Currency format in output in swift language

I'm looking for a way to format a string into currency using the UITextField  in language swift for iOS 8

Using NSNumberFormatter to format currency in output swift language

For example, i'd like to have the number "123456" converted into "$1,234.45" Or if I have a number under 1$, I would like it to look like this: "12" -> "$0.12"

I use this code. This work for me

1)  Add UITextField Delegate to header file

2) Add this code  

  func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {

        if textField.tag == 100 && phoneNumberValidation(string) || string == "" && phoneNumberValidation(string)

        {

            var cleanArray = textField.text.componentsSeparatedByCharactersInSet(NSCharacterSet.decimalDigitCharacterSet().invertedSet) as NSArray

            var cleanCentString  = cleanArray.componentsJoinedByString("")

            var centAmount:NSInteger! =  cleanCentString.toInt()

            if countElements(string) > 0

            {

                if centAmount == nil

                {

                    centAmount = 0

                }

                centAmount = centAmount * 10 + string.toInt()!

            }else

            {

                centAmount = centAmount / 10

            }

            var floatValue = Double(centAmount) / 100

            var amount = NSNumber(double:  floatValue )

            var _currencyFormatter = NSNumberFormatter()

            _currencyFormatter.numberStyle = .CurrencyStyle

            _currencyFormatter.currencyCode = "USD"

            _currencyFormatter.negativeFormat = "-¤#,##0.00"

            textField.text = _currencyFormatter.stringFromNumber(amount)

        }

        if textField.tag != 100 {

            return true

        }

        return false

    }

    

    

    

    func phoneNumberValidation(value: String) -> Bool {

        var charcter  = NSCharacterSet(charactersInString: "0123456789").invertedSet

        var filtered:NSString!

        var inputString:NSArray = value.componentsSeparatedByCharactersInSet(charcter)

        filtered = inputString.componentsJoinedByString("")

        return  value == filtered

    }

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