Swift Picker Items - swift

Question

I'm trying to make items show up on my pickerView, I can't seem to figure out why its not showing up. Any Suggestions?
import UIKit
class InspectionViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
#IBOutlet weak var picker: UIPickerView!
var pickerData: [String] = [String]();
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
// Connect data:
self.picker.delegate = self;
self.picker.dataSource = self;
// Input data into the Array:
pickerData = ["53W4", "Item 2", "Item 3", "Item 4", "Item 5", "Item 6"];
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return pickerData.count
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
return pickerData[row]
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}

Answer 1

You should use this:
func pickerView(
_ pickerView: UIPickerView,
titleForRow row: Int,
forComponent component: Int
) -> String? {
pickerData[row]
}
instead of:
func pickerView(
pickerView: UIPickerView,
titleForRow row: Int,
forComponent component: Int
) -> String! {
pickerData[row]
}
The diff is in Omitting Argument Labels.
Here is a doc link