How do I confirm my selection in UIPickerView with a done button? - swift

Question

I apologise for this question, other questions are either outdated or are about embedding buttons within a UIPickerView
I have a UIPickerView which displays 3 strings; once my user has selected the string he wishes to select, I want him to hit a done button (which is not embedded in the UIPickerView itself; but appears separately).
let strings = ["1", "2", "3"]
fileprivate let pickerView: UIPickerView = {
let pv = UIPickerView()
pv.translatesAutoresizingMaskIntoConstraints = false
return pv
}()
override func viewDidLoad() {
pickerView.delegate = self
pickerView.dataSource = self
}
let button: UIButton = {
let btn = UIButton()
btn.translatesAutoresizingMaskIntoConstraints = false
btn.setTitle("Done", for: .normal)
btn.addTarget(self, action: #selector(donePressed), for: .touchUpInside)
return btn
}()
#objc func donePressed(_ sender: UIButton) {
print("Done pressed")
//Pressing this should print whichever row is currently selected
}
extension ViewController: UIPickerViewDataSource {
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return strings.count
}
}
extension ViewController: UIPickerViewDelegate {
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
strings[row]
}

Answer 1

#objc func donePressed(_ sender: UIButton) {
print("Done pressed")
print(strings[pickerView!.selectedRow(inComponent: 0)])
}

Answer 2

Start by looking for something useful in the documentation. Ah, here it is:
https://developer.apple.com/documentation/uikit/uipickerview/1614369-selectedrow
So. Have your button call the picker view's selectedRow(inComponent:). There is only one component so you will pass 0. The return value is the index (the selected row). Use that as an index into strings if you want to know the actual value (the string).