UITextField format in xx-xx-xxx

Question

I am using UITextField and i want that should take character in the format of xx-xx-xxx only numbers.

any help ?

Answer 1

Here is my take on it after looking at everyone's answers.

Swift 4

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
    let separator = "-"
    let filler = "X"
    if var number = textField.text, string != "" {
        number = number.replacingOccurrences(of: separator, with: "")
        number = number.replacingOccurrences(of: filler, with: "")
        if number.count == 10 { return false }
        number += string
        while number.count < 10 { number += "X" }
        number.insert("-", at: number.index(number.startIndex,
                                            offsetBy: 6))
        number.insert("-", at: number.index(number.startIndex,
                                            offsetBy: 3))
        textField.text = number
    }
    return false
}