comma separated number with 2 digit fraction - swift - swift

Question

I have a textfield that it's input is price, so I want to get both like this: 1,111,999.99. I wrote to make it possible but there are two problems. First, after four digits and 2 fraction digit (like 1,234.00) it resets to zero. Second, I can't put fraction in it (fraction is always .00)
how can i make a textfield that receives 1,111,999.99 as input?
in my custom UITextfield:
private var numberFormatter: NumberFormatter {
let formatter = NumberFormatter()
formatter.maximumFractionDigits = 2
formatter.minimumFractionDigits = 0
formatter.numberStyle = .decimal
formatter.decimalSeparator = "."
formatter.groupingSeparator = ","
return formatter
}
var commaValue: String {
return numberFormatter.string(from: value)!
}
var value: NSNumber {
let number = numberFormatter.number(from: self.text ?? "0")
return number!
}
and in my textfieldDidChange method:
#IBAction func textfieldEditingChanged(_ sender: Any) {
let textfield = sender as! UITextField
textfield.text = textfield.commaValue
}

Answer 1

Solved it temporarily this way:
var formattedNumber: String {
guard self.text != "" else {return ""}
var fraction = ""
var digit = ""
let fractionExists = self.text!.contains(".")
let num = self.text?.replacingOccurrences(of: ",", with: "")
let sections = num!.characters.split(separator: ".")
if sections.first != nil
{
let str = String(sections.first!)
let double = Double(str)
guard double != nil else {return self.text ?? ""}
digit = numberFormatter.string(from: NSNumber(value: double ?? 0))!
}
if sections.count > 1
{
fraction = String(sections[1])
if fraction.characters.count > 2
{
fraction = String(fraction.prefix(2))
}
return "\(digit).\(fraction)"
}
if fractionExists
{
return "\(digit)."
}
return digit
}
.
#IBAction func textfieldEditingChanged(_ sender: Any) {
let textfield = sender as! UITextField
textfield.text = textfield.formattedNumber
}