'[String]'型の戻り式を 'String'型に変換できません。/UIPickerView

Question

私はUIPickerViewを使用していて、エラーが発生しています（ '[String]'型の戻り式を 'String'型/ UIPickerView型に変換できません）。ここに私のコードです。

// where the picker view is set up. 
let cubesToWorkWith = ["3X3", "2X2", "4X4", "5X5", "6X6", "7X7", "Skewb", "Square-One"] 
let threeByThreeArray = ["OLL", "PLL"] 
@IBOutlet weak var pickerViewOutlet: UIPickerView! 

func numberOfComponents(in pickerView: UIPickerView) -> Int { 
    return 2 
} 

func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { 
    let row = pickerView.selectedRow(inComponent: 0) 
    print("this is the pickerView\(row)") 

    switch row { 
    case 0: 
     return threeByThreeArray.count 
    default: 
     return cubesToWorkWith.count 
    } 
} 
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 
    switch row { 
    case 0: 
     return threeByThreeArray[row] 
    default: 
     return getArrayForRow(row: row) 
    } 
} 
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { 
    cubeSelected = Int16(row) 
} 
func getArrayForRow(row: Int) -> [String] { 

    switch row { 
    case 0: 
     return threeByThreeArray 
    default: 
     return cubesToWorkWith 
    } 

    } 
} 
} 

と私は「getArrayForRow（行：行）を返す」でtitleForRow内部のスイッチケースでエラーを取得する事前に任意の助け ありがとう!!!!

Answer 1

ので、あなたが をsekfとtitleForRowにするために、デリゲートの広告データソースを設定する必要があり、最初の数の事 が不足して：あなたは、文字列を返す必要があなたの FUNCのgetArrayForRow（行：INT）ので - > [文字列] をする必要が FUNCのgetArrayForRow（行：INT）のようになる - >文字列

ここでは私の申し出である：

クラスのViewController：のUIViewController、UIPickerViewDelegate、UIPickerViewDataSource {ピッカービューが設定されている //。 let threeByThreeArray = ["3X3"、 "2X2"、 "4X4"、 "5X5"、 "6X6"、 "7X7"、 "Skewb"、 "Square- 「]

@IBOutlet weak var pickerViewOutlet: UIPickerView! 


override func viewDidLoad() { 
    super.viewDidLoad() 
    self.pickerViewOutlet.dataSource = self 
    self.pickerViewOutlet.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 2 
} 

func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { 
    let row = pickerView.selectedRow(inComponent: 0) 
    print("this is the pickerView\(row)") 

    switch row { 
    case 0: 
     return threeByThreeArray.count 
    default: 
     return cubesToWorkWith.count 
    } 
} 
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 
    switch row { 
    case 0: 
     return threeByThreeArray[row] as String 
    default: 
     return getArrayForRow(row: row) as String 
    } 
} 
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { 
    // cubeSelected = Int16(row) 
} 

func getArrayForRow(row: Int) -> String { 

    switch row { 
    case 0: 
     return threeByThreeArray[row] 
    default: 
     return cubesToWorkWith[row] 
    } 

} 

}