swiftuikituitextfielduitextfielddelegate

How to star part of text field? Like 1234 **** **** 1234

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While the user is entering the credit card number, I want to star a certain part of the text field as above for security. How can I do it?

Solution

  • I found the Solution, first of you have to add Delegate for that TextField, After Adding TextField you have to add below code,

    func textFieldDidChangeSelection(_ textField: UITextField) {
    if (textField.text?.count ?? 0) > 4 && (textField.text?.count ?? 0) < 15{
        let firstFourElement = String(self.textFieldEmail.text?.prefix(4) ?? "")
        switch textField.text?.count ?? 0 {
        case 5:
            self.textFieldEmail.text = firstFourElement + " *"
        case 7:
            self.textFieldEmail.text = firstFourElement + " **"
        case 8:
            self.textFieldEmail.text = firstFourElement + " ***"
        case 9:
            self.textFieldEmail.text = firstFourElement + " ****"
        case 10:
            self.textFieldEmail.text = firstFourElement + " **** *"
        case 12:
            self.textFieldEmail.text = firstFourElement + " **** **"
        case 13:
            self.textFieldEmail.text = firstFourElement + " **** ***"
        case 14:
            self.textFieldEmail.text = firstFourElement + " **** **** "
        default:
            print("TEST")
        }
    }
}