UIPickerView only populates with "?" - ios

Question

So I'm trying to populate my two pickerViews from arrays, but only coming up with "?" I've tried some of the fixes for similar types on here but none of them have worked.
#IBOutlet var startPickerView: UIPickerView!
#IBOutlet var endPickerView: UIPickerView!
var startPickerData: [Int] = []
var endPickerData: [Int] = []
let startArray = (1...999).map { $0 }
let endArray = (2...1000).map { $0 }
let startPickerCellIndexPath = IndexPath(row: 1, section: 1)
let endPickerCellIndexPath = IndexPath(row: 1, section: 2)
var isStartPickerShown: Bool = false {
didSet {
startPickerView.isHidden = !isStartPickerShown
}
}
var isEndPickerShown: Bool = false {
didSet {
endPickerView.isHidden = !isEndPickerShown
}
}
override func viewDidLoad() {
super.viewDidLoad()
self.startPickerView.delegate = self
self.startPickerView.dataSource = self
self.endPickerView.delegate = self
self.endPickerView.dataSource = self
startPickerData = startArray
endPickerData = endArray
self.startPickerView.reloadAllComponents()
self.endPickerView.reloadAllComponents()
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 2
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return 1
}
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
switch indexPath {
case startPickerCellIndexPath:
if isStartPickerShown {
return 216.0
} else {
return 0.0
}
case endPickerCellIndexPath:
if isEndPickerShown {
return 216.0
} else {
return 0.0
}
default:
return 44.0
}
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
switch indexPath {
case startPickerCellIndexPath:
if isStartPickerShown {
isStartPickerShown = false
} else if isStartPickerShown {
isStartPickerShown = false
isStartPickerShown = true
} else {
isStartPickerShown = true
}
tableView.beginUpdates()
tableView.endUpdates()
case endPickerCellIndexPath:
if isEndPickerShown {
isEndPickerShown = false
} else if isEndPickerShown {
isEndPickerShown = false
isEndPickerShown = true
} else {
isEndPickerShown = true
}
tableView.beginUpdates()
tableView.endUpdates()
default:
break
}
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
// The number of rows of data
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
if pickerView.tag == 1 {
return startPickerData.count
} else {
return endPickerData.count
}
}
// The data to return fopr the row and component (column) that's being passed in
private func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> Int? {
let startView: Int = startPickerData[row]
let endView: Int = endPickerData[row]
if pickerView.tag == 1 {
return startView
} else {
return endView
}
}
}
I've been working on this for a day and a half and haven't been able to figure out why it won't work and I've already tried several fixes from here.

Answer 1

You need to change your private method at the very bottom to this:
// The data to return fopr the row and component (column) that's being passed in
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
let startView: Int = startPickerData[row]
let endView: Int = endPickerData[row]
if pickerView.tag == 1 {
return String(format: "%d", startView)
} else {
return String(format: "%d", endView)
}
}