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- class ViewController: UIViewController {
- @IBOutlet weak var txtFieldDemo: UITextField! {
- didSet{
- txtFieldDemo.delegate = self
- txtFieldDemo.addTarget(self, action: #selector(textFieldDidChange(textField:)), for: .editingChanged)
- }
- }
- }
- extension ViewController: UITextFieldDelegate{
- func textFieldDidBeginEditing(_ textField: UITextField) {
- textField.underlined()
- }
- func textFieldDidEndEditing(_ textField: UITextField) {
- textField.removeUnderline()
- }
- @objc func textFieldDidChange(textField: UITextField){
- textField.hideUnderline()
- textField.underlined()
- }
- }
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