UIPickerViewDelegate Xcodeの8スウィフト3

Question

私のコードは次のとおりです。

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

どれソリューション：

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])")} 
    } 

このコードはエラーがありますか？

Answer 1

スウィフト3で行われ、ボタンの完全な例でPickerView スウィフト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

PickerViewの正しい構文

1. まず、SWIFT 3.ドラッグでテキストを単一のビューアプリケーションを作成します。フィールド&はView Controllerに接続します。
2. numberOfComponentsのようなメソッドを実装する必要があり、numberOfRowsInComponent、titleForRow
3. ピッカービューのように見える画像

4. 以下は完全なソースは

   怒鳴る与えられているUIPickerViewDelegate & UIPickerViewDataSource
5. UIPickerViewDataSource
、UIPickerViewDelegateという名前の2つのPickerViewプロトコルで実装

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. Gに与えられたプロジェクトithub。ギブスリンク：https://github.com/enamul95/PickerView1.git