implementing Replace and Insert Buttons in Xcode/Swift - swift

Question

I am new to xCode and confused about implementing the following two things to the replace button and insert button. Can someone please helpWhen you press the
“replace” button, the item selected in the picker should be replaced by the contents of the text field (blank if
nothing in the text field). When you press “insert”, the contents of the text field should be added to the data for
the picker, after the item currently selected, and the new, added, item should be shown in the picker as the
selected item (so the previously selected item would be immediately above it on the picker’s display at that
point).
class ViewController: UIViewController {
#IBOutlet weak var countryTextField: UITextField!
#IBOutlet weak var selectButton: UIButton!
#IBOutlet weak var replaceButton: UIButton!
#IBOutlet weak var insertButton: UIButton!
let countries = ["USA", "MEXICO", "CANADA"]
var pickerView = UIPickerView()
override func viewDidLoad() {
super.viewDidLoad()
pickerView.delegate = self
pickerView.dataSource = self
countryTextField.inputView = pickerView
countryTextField.textAlignment = .center
}
}
extension ViewController: UIPickerViewDelegate, UIPickerViewDataSource {
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return countries.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return countries[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
countryTextField.text = countries[row]
countryTextField.resignFirstResponder()
}
}

Answer 1

Create #IBAction for your Buttons from xib and add conditions accordingly. It will look like these-
#IBAction func insertAction(sender: UIButton){
// write code for insert
}
#IBAction func replaceAction(sender: UIButton){
// write code for replace
}