Я пытаюсь следовать следующему решению , чтобы иметь несколько UIPickerViews на одном UIViewController.Они предполагают наличие тега для каждого поля UIText, которое я сделал и могу реализовать количество строк, заголовок для строки и количество компонентов.Однако я столкнулся с камнем преткновения при реализации строки действительно выбора.Когда я выбираю UITextField, он выделяет другое поле UIText.Ниже приведен код, который у меня есть.class DriverViewController: UIViewController {
var selectedTrack: String?
var firstDriver: String?
var secondDriver: String?
var thirdDriver: String?
let tracks = ["Melbourne", "Manama", "Shanghai", "Baku",
"Barcelona", "Monaco", "Montreal","Le Castellet","Spielberg",
"Silverstone","Hockenheim","Budapest","Francorchamps","Monza","Singapore","Sochi","Suzuka","Austin","Interlagos","Abu Dhabi"]
let drivers = ["Lewis Hamilton","Antonio Giovinazzi","Kimi Raikkonen","Charles Leclerc","Sebastian Vettel","Romain Grosjean","Kevin Magnussen","Lando Norris",
"Carlos Sainz","Valtteri Bottas","Sergio Perez","Lance Stroll","Pierre Gasly","Max Verstappen","Nico Hulkenberg","Daniel Ricciardo","Alexander Albon","Daniil Kvyat","Robert Kubica","George Russell"]
@IBOutlet weak var TrackTextField: UITextField!
@IBOutlet weak var firstTextField: UITextField!
@IBOutlet weak var secondTextField: UITextField!
@IBOutlet weak var thirdTextField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
createTrackPicker()
createDriverPicker()
createToolBar()
// Do any additional setup after loading the view.
}
func createTrackPicker() {
let trackPicker = UIPickerView()
trackPicker.tag = 0
trackPicker.delegate = self
TrackTextField.inputView = trackPicker
}
func createDriverPicker() {
let driverPicker = UIPickerView()
driverPicker.tag = 1
driverPicker.tag = 2
driverPicker.tag = 3
driverPicker.delegate = self
firstTextField.inputView = driverPicker
secondTextField.inputView = driverPicker
thirdTextField.inputView = driverPicker
}
func createToolBar() {
let toolBar = UIToolbar()
toolBar.sizeToFit()
let doneButton = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(ViewController.dismissKeyboard))
toolBar.setItems([doneButton], animated: false)
toolBar.isUserInteractionEnabled = true
TrackTextField.inputAccessoryView = toolBar
firstTextField.inputAccessoryView = toolBar
secondTextField.inputAccessoryView = toolBar
thirdTextField.inputAccessoryView = toolBar
}
@objc func dismissKeyboard() {
view.endEditing(true)
}
/*
// 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.destination.
// Pass the selected object to the new view controller.
}
*/
}
extension DriverViewController: UIPickerViewDelegate, UIPickerViewDataSource {
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
if pickerView.tag == 0 {
return tracks.count
} else {
return drivers.count
}
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
if pickerView.tag == 0 {
return "\(tracks[row])"
} else {
return "\(drivers[row])"
}
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if pickerView.tag == 0 {
selectedTrack = tracks[row]
TrackTextField.text = selectedTrack
} else if pickerView.tag == 1 {
firstDriver = drivers[row]
firstTextField.text = firstDriver
} else if pickerView.tag == 2 {
secondDriver = drivers[row]
secondTextField.text = secondDriver
} else if pickerView.tag == 3 {
thirdDriver = drivers[row]
thirdTextField.text = thirdDriver
}
}
}
Вот как это выглядит на экране. 