UIPickerViewDelegate Xcode 8 Swift 3

Question

Mein Code ist:

class ViewController: UIViewController,UIPickerViewDelegate, UIPickerViewDataSource { 
    @IBOutlet weak var picherview: UIPickerView! 

    var prodotti = ["AAAAA", "VVVV", "CCCC"] 

    override func viewDidLoad() { 
     super.viewDidLoad() 
     self.picherview.dataSource = self 
     self.picherview.delegate = self 
     // Do any additional setup after loading the view, typically from a nib. 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 

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

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

    func pickerview(_ : UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! { 
     return prodotti[row] 
    }  //ci consente di determinare quale riga è stata selezionata 

    func pickerview(_ : UIPickerView, didSelectRow row: Int, inComponent component: Int) { 
     print("Hai selezionato: \(prodotti[row])")} 
    } 

Dieser Fehlercode haben:

Type 'ViewController' does not conform to protocol 'UIPickerViewDataSource'

eine Lösung?

Answer 1

korrekte Syntax von picker Swift 3

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

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

} 

// Delegate 

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

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

} 

Answer 2

picker mit done Taste vollständiges Beispiel in Swift 3

1. Zu allererst Erstellen Sie eine einzelne Ansicht Anwendung in schnellen 3. Ziehen Sie eine Text Feld & verbinden, um Controller anzuzeigen.
2. Umsetzung in zwei picker Protokoll namens UIPickerViewDelegate, UIPickerViewDataSource
3. UIPickerViewDelegate & UIPickerViewDataSource müssen Methoden wie numberOfComponents implementieren, numberOfRowsInComponent, titleForRow
4. Picker Ansicht Look Like Unten Bild

5. Voll Quelle unten

   gegeben

   class ViewController:UIViewController,UIPickerViewDelegate,UIPickerViewDataSource { 
   //Text field Connect 
   @IBOutlet weak var txtPickerTextField: UITextField! 
   //Array declare 
   let pickerArray = ["Bangladesh","India","Pakistan","USA"] 
   var selectedRow = 0; 
   //Picker View Object 
   let picker = UIPickerView() 
   
       override func viewDidLoad() { 
       super.viewDidLoad() 
       //Don't forget to initialize pickerview delegate & datasource 
       picker.delegate = self 
       picker.dataSource = self 
       txtPickerTextField.inputView = picker 
       //Done Button function called 
       doneButton(); 
   } 
       public func numberOfComponents(in pickerView: UIPickerView) -> Int { 
       return 1 
       } 
   
       func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { 
       return pickerArray.count 
       } 
   
       public func pickerView(_pickerView:UIPickerView,numberOfRowsInComponent component: Int) -> Int { 
        return pickerArray.count 
       } 
   
       func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 
        return pickerArray[row] 
       } 
       func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { 
        selectedRow = row; 
        txtPickerTextField.text = pickerArray[row] 
        self.view.endEditing(false) 
       } 
   
       //begin Doen Button function 
       func doneButton(){ 
   
       let pickerView = picker 
       pickerView.backgroundColor = .white 
       pickerView.showsSelectionIndicator = true 
   
       var toolBar = UIToolbar() 
       toolBar.barStyle = UIBarStyle.default 
       toolBar.isTranslucent = true 
       toolBar.tintColor = UIColor(red: 76/255, green: 217/255, blue: 100/255, alpha: 1) 
       toolBar.sizeToFit() 
   
        let doneButton = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.bordered, target: self, action: "donePicker") 
        let spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: nil, action: nil) 
        let cancelButton = UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.bordered, target: self, action: "canclePicker") 
   
        toolBar.setItems([cancelButton, spaceButton, doneButton], animated: false) 
        toolBar.isUserInteractionEnabled = true 
   
        txtPickerTextField.inputView = pickerView 
        txtPickerTextField.inputAccessoryView = toolBar 
        } 
   
   
       func donePicker() { 
       self.txtPickerTextField.text = pickerArray[selectedRow] 
       txtPickerTextField.resignFirstResponder() 
       } 
   
        func canclePicker() { 
        txtPickerTextField.resignFirstResponder() 
        } 
         //End Doen Button function 
        } 
   

6. Komplettes Projekt wird an G gegeben ithub. Github Link: https://github.com/enamul95/PickerView1.git