如何在UIPickerView中显示所需的行？

Question

我知道数组中的数据，加载我的应用程序时需要显示选定的行。例如，如何在开始时选择“四个”？

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let arrayOfNumbers = ["One", "Two", "Three", "Four", "Five"]

override func viewDidLoad() {
    super.viewDidLoad()
    pickerTest.delegate = self
    pickerTest.dataSource = self
}

@IBOutlet weak var pickerTest: UIPickerView!

func numberOfComponents(in pickerView: UIPickerView) -> Int {
    return 1
}

func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
    return arrayOfNumbers.count
}

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

Answer 1

pickerTest.selectRow(4, inComponent: 0, animated: true)