从选择器视图（选择器轮）中获取选定的值

Question

I'm currently using XCode version 11.3.1 (11C505) and Swift 5 and I can't seem to find a good answer as to how to get the selected value from a picker wheel (view). Here's the relevant code from my ViewController.swift

class ViewController: UIViewController {
    @IBOutlet weak var numberPicker: UIPickerView!
    @IBOutlet weak var test: UILabel!

    private let possibleNums: [Int] = Array(1...16) // Create an array of Ints from 1 to 16
       
    override func viewDidLoad() {
        super.viewDidLoad()
        numberPicker.dataSource = self
        numberPicker.delegate = self
    }
}


extension ViewController: UIPickerViewDataSource {
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
    
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return possibleNums.count
    }
    // Attempt at getting the selected value, didn't work
    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int {
        print(possibleNums[numberPicker.selectedRow(inComponent: 0)])
        test.text = "\(possibleNums[numberPicker.selectedRow(inComponent: 0)])"
    }
}

extension ViewController: UIPickerViewDelegate {
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return String(possibleNums[row])
    }
}

Edit: Solution was also in comments so I figured I'd put it here in case anyone else finds this: func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int should be func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int (missing _ ) and test.text = "\(possibleNums[numberPicker.selectedRow(inComponent: 0)])" should just be test.text = "\test.text = "\(possibleNums[row])"

Answer 1

Change test.text = "\(possibleNums[numberPicker.selectedRow(inComponent: 0)])" to this: test.text = "\(possibleNums[row])"

You only have one component, so you don't need to check for it, just return the row number as the array's index.

Answer 2

The easiest way to do that is to change your didSelectRow function from

test.text = "\(possibleNums[numberPicker.selectedRow(inComponent: 0)])"

to

test.text = "\(possibleNums[rows])"