swift多重pickerView

Question

当我填充选择器视图时，我似乎无法将所有三个选项都显示出来。它只会给出最后选定的列结果。

import UIKit

class ViewThree: UIViewController, UIPickerViewDelegate {

    @IBOutlet var sizePicker: UIPickerView!

    var wheelContents:[[String]] = []
    var one = ["1", "2"]
    var two = ["A", "B", "C"]
    var three = ["X", "Y"]

    @IBOutlet var sparLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()
        wheelContents = [one, two, three]
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
        return wheelContents.count
    }

    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return wheelContents[component].count
    }

    func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
        return wheelContents[component][row]
    }

    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {

        var wheel = wheelContents[component][row]
        sparLabel.text = "\(wheel)"
    }
}

问题是，我不知道在我的didSelectRow {}中放什么，如果我作为单独的结果生成它们，那么每当我选择三行列的第三个选项时，似乎都会崩溃。如果保持原样，它只会给出最后选定的列和行。我想把它放在一个标签上，像“1 1CY”。

谢谢

Answer 1

var result = ""

for var i = 0; i < wheelContents.count; i++
{
    let selectedRow = pickerView.selectedRowInComponent(i) //get selected row in component
    let value = wheelContents[i][selectedRow] //get displayed value in component
    result += value + " "
}

sparLabel.text = result