UITextField delegate

textfield-delegate.swift

// MARK: - UITextFieldDelegate -

func textFieldDidBeginEditing(_ textField: UITextField) {
  let screen_offset = (UIScreen.main.bounds.size.height - 330) - 60 // Gets offset based on screen size and keyboard / nav height
  let y = textField.frame.origin.y - screen_offset
  self.scrollView.setContentOffset(CGPoint(x: 0, y: y > 0 ? y : 0), animated: true)
}

func textFieldDidEndEditing(_ textField: UITextField) {
  
}
    
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
    let text = textField.text ?? ""
    let updatedText = (text as NSString).replacingCharacters(in: range, with: string) as String
    
    // Do something with updatedText ...
    
    return true
}

func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    textField.resignFirstResponder()
    return true
}