2 TextField 在 1 UIView 中有 2 個選擇器

Question

我在 1UIView 中創建了一個帶有 2 個選擇器的 2 個文本字段，但是我無法在正確的文本字段中顯示正確的選擇器，因為我不知道如何識別當前處於活動狀態的視圖。 我嘗試了一些帶有標簽的東西（但只適用於選擇器，不適用於文本字段），並創建 var current = UITextField()

var genre = ["-","Homme","Femme"]
var Sport = ["-","Tennis"]
var picker = UIPickerView()
var currentTextField = UITextField()

override func viewDidLoad() {
        super.viewDidLoad()

 picker.delegate = self
    picker.dataSource = self
    GenderTextField.inputView = picker
    WitchSportTextField.inputView = picker

func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        if currentTextField == GenderTextField{
        return genre.count
        }else{
            return Sport.count
        }
    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        if currentTextField == GenderTextField {
            GenderTextField.text = genre[row]
        }else{
            WitchSportTextField.text = Sport[row]
        }
    }
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        if currentTextField == GenderTextField{
        return genre[row]
         }else{
            return Sport[row]
        }
    }

有人作為一個想法？

Answer 1

首先在viewDidLoad中將您的兩個 TextField 委托分配給 self

GenderTextField.delegate = self
WitchSportTextField.delegate = self

使用此擴展來確定哪個TextField處於活動狀態。

extension YourClass: UITextFieldDelegate {
    func textFieldDidBeginEditing(_ textField: UITextField) {
         currentTextField = textField
         picker.reloadAllComponents() //Reload for accurate data
    }
}

注意：變量名應以小寫字母開頭。 使用描述性名稱來闡明您的意圖：

看看這個： https : //github.com/MLSDev/development-standards/blob/master/platform/ios/swift-coding-conventions.md

Answer 2

這是完整的代碼

var genre = ["-","Homme","Femme"]
var Sport = ["-","Tennis"]
var genrepicker = UIPickerView()
var Sportpicker = UIPickerView()
var genretTextField = UITextField()
var SportTextField = UITextField()

override func viewDidLoad() {
        super.viewDidLoad()

    genrepicker.delegate = self
    genrepicker.dataSource = self

    Sportpicker.delegate = self
    Sportpicker.dataSource = self
    genretTextField.inputView = genrepicker
    SportTextField.inputView = Sportpicker

func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        if pickerView == genrepicker{
        return genre.count
        }else{
            return Sport.count
        }
    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        if pickerView == genrepicker {
            GenderTextField.text = genre[row]
        }else{
            WitchSportTextField.text = Sport[row]
        }
    }
   func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        if pickerView == genrepicker{
        return genre[row]
         }else{
            return Sport[row]
        }
    }