swift中同一UIView中的多個自定義UIPickerViews

Question

我試圖在同一個viewController上使用兩個不同的pickerView，並讓它們表示不同的數據。我嘗試了不同的方法來做到這一點，但兩個選擇器視圖顯示相同的數據，但不能放在一起。任何幫助都是極好的！

這裏是我的代碼：

@IBOutlet weak var Eventtype: UITextField! 


    let pickerView = UIPickerView() 

    var Eventstype = ["Birthday" , "Marriege" , "Get together", "Conference"] 

    @IBOutlet weak var datepickertxt: UITextField! 

    var datepicker = UIDatePicker() 

    @IBOutlet weak var Duration: UITextField! 
    let duration = UIPickerView() 

    var Durations = ["6-8","1-5","7-9","10-12"] 


    override func viewDidLoad() { 
     super.viewDidLoad() 

     createDatePicker() 
     pickerView.delegate = self 
     pickerView.dataSource = self 
     duration.delegate = self 
     duration.dataSource = self 
     Eventtype.inputView = pickerView 
     Duration.inputView = duration 
     // Do any additional setup after loading the view. 
    } 
    ////For Event Picker view 

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

     return 1 


    } 

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { 

     if (pickerView.tag == 0) { 
      //pickerView1 
      return Eventstype.count 
     } else if (duration.tag == 1){ 
      //pickerView2 
      return Durations.count 
     } 
     return 1 
     //return DurationTxt.count 
    } 

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 
     if (pickerView.tag == 0) { 

      return Eventstype[row] 
     } else if (duration.tag == 1){ 

      return Durations[row] 
     } 

     return "" 
    } 
     //return DurationTxt[row] 


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

     if (pickerView.tag == 0) { 
      Eventtype.text = Eventstype[row] 
      self.view.endEditing(false) 
     }else if (duration.tag == 1){ 
      Duration.text = Durations[row] 
      self.view.endEditing(true) 

     } 

    } 

Answer 1

設置在viewDidLoad中pickerview標籤，如下圖所示，

pickerView.tag = 0 
duration.tag = 1 

Answer 2

@IBOutlet weak var Eventtype: UITextField! 


    let pickerView = UIPickerView() 

    var Eventstype = ["Birthday" , "Marriege" , "Get together", "Conference"] 

    @IBOutlet weak var datepickertxt: UITextField! 

    var datepicker = UIDatePicker() 

    @IBOutlet weak var Duration: UITextField! 
    let duration = UIPickerView() 

    var Durations = ["6-8","1-5","7-9","10-12"] 


    override func viewDidLoad() { 
     super.viewDidLoad() 

     createDatePicker() 
     pickerView.delegate = self 
     pickerView.dataSource = self 
     duration.delegate = self 
     duration.dataSource = self 
     Eventtype.inputView = pickerView 
     Duration.inputView = duration 
     pickerView.tag = 0 
     duration.tag = 1 
     // Do any additional setup after loading the view. 
    } 
    ////For Event Picker view 

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

     return 1 


    } 

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { 

     if (pickerView.tag == 0) { 
      //pickerView1 
      return Eventstype.count 
     } else if (duration.tag == 1){ 
      //pickerView2 
      return Durations.count 
     } 
     return 1 
     //return DurationTxt.count 
    } 

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 
     if (pickerView.tag == 0) { 

      return Eventstype[row] 
     } else if (duration.tag == 1){ 

      return Durations[row] 
     } 

     return "" 
    } 
     //return DurationTxt[row] 


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

     if (pickerView.tag == 0) { 
      Eventtype.text = Eventstype[row] 
      self.view.endEditing(false) 
     }else if (duration.tag == 1){ 
      Duration.text = Durations[row] 
      self.view.endEditing(true) 

     } 

    } 

這是通過標籤來實現的，否則喲可以檢查委託像

if pickerView == duration 

Answer 3

class ViewController: UIViewController { 

    @IBOutlet var txtDuration: UITextField! 
    @IBOutlet var txtEventType: UITextField! 

    var pickerView = UIPickerView() 

    var arrEventType : [String] = [] 
    var arrDuration : [String] = [] 

    var currentTextField : UITextField? 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     arrEventType = ["Birthday" , "Marriage" , "Get together", "Conference"] 
     arrDuration = ["6-8","1-5","7-9","10-12"] 
    } 
} 

extension ViewController : UIPickerViewDelegate , UIPickerViewDataSource { 

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

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { 

     if currentTextField == txtEventType { 
      return arrEventType.count 
     } else if currentTextField == txtDuration { 
      return arrDuration.count 
     } else { 
      return 0 
     } 
    } 

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 

     if currentTextField == txtEventType { 
      return arrEventType[row] 
     } else if currentTextField == txtDuration { 
      return arrDuration[row] 
     } else { 
      return "" 
     } 
    } 

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

     if currentTextField == txtEventType { 
      txtEventType.text = arrEventType[row] 
     } else if currentTextField == txtDuration { 
      txtDuration.text = arrDuration[row] 
     } 
    } 
} 

extension ViewController : UITextFieldDelegate { 

    func textFieldDidBeginEditing(_ textField: UITextField) { 
     self.pickerView.delegate = self 
     self.pickerView.dataSource = self 
     currentTextField = textField 
     if currentTextField == txtEventType { 
      currentTextField?.inputView = pickerView 
     } else if currentTextField == txtDuration { 
      currentTextField?.inputView = pickerView 
     } 

    } 
} 

以上幾行代碼可能只需一個UIPickerView即可解決您的問題，無需標籤