我使用不同的数组填充选取器视图,具体取决于您单击哪个文本字段。但是,无论何时我选择“Untergrund”数组的第五行,该应用程序都会崩溃,索引超出范围错误。它显示了行int = 4和组件int = 0。错误发生在第一个if语句在did select行函数中设置的行中。我不知道为什么会这样......使用选取器视图时指数超出范围错误
下面是相关代码:
@IBOutlet weak var Stadt: UITextField!
@IBOutlet weak var Strasse: UITextField!
@IBOutlet weak var Platzart: UITextField!
@IBOutlet weak var Groesse: UITextField!
@IBOutlet weak var AnzToreKoerbe: UITextField!
@IBOutlet weak var Untergrund: UITextField!
// Variable für die Firebase Database
override func viewDidLoad() {
super.viewDidLoad()
Stadt.delegate = self
Untergrund.delegate = self
Groesse.delegate = self
AnzToreKoerbe.delegate = self
Platzart.delegate = self
Picker.delegate = self
}
@IBOutlet weak var Picker: UIPickerView!
var currentData = [""]
let UntergrundArray = ["Asphalt", "Kunstrasen Sand", "Kunstrasen Granulat", "Rasen", "Tartan", " "]
let StadtArray = ["Norderstedt", "Hamburg", "Berlin", "München"]
let GroesseArray = [ "2 vs 2", "3 vs 3", "4 vs 4", "5 vs 5"]
let AnzTorKoerbe = ["1", "2", "3", "4"]
let Art = ["Fußball", "Basketball"]
func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool{
if textField.tag == 1{
currentData = StadtArray
}else if textField.tag == 2{
currentData = UntergrundArray
}else if textField.tag == 3 {
currentData = GroesseArray
}else if textField.tag == 4 {
currentData = AnzTorKoerbe
}else if textField.tag == 5 {
currentData = Art
}
Picker.reloadAllComponents()
return false;
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return currentData.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return currentData[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
let itemSelected = currentData[row]
print(itemSelected)
if (itemSelected == StadtArray[row]) {
Stadt.text = StadtArray[row]
}else if (itemSelected == UntergrundArray[row]) {
Untergrund.text = UntergrundArray[row]
}else if (itemSelected == GroesseArray[row]) {
Groesse.text = GroesseArray[row]
}else if (itemSelected == AnzTorKoerbe[row]) {
AnzToreKoerbe.text = AnzTorKoerbe[row]
}else {
Platzart.text = Art[row]
}
}
如果您将当前模型交换到'currentData'中,以便正确的计数总是'currentData.count','didSelectRow'中的大'if/else'的指向是什么?当然'currentData [row]'总是所需的数据。这样就不会有得到错误的模型数组和错误的索引值的风险。 – matt
仅供参考 - 标准的做法是将变量和方法命名为以小写字母开头。类名应以大写字母开头。 – rmaddy
@rmaddy同意,但要理解这对于德语人来说是一个困难的惯例,他们的语言要求以大写字母开头。如果你懂德语,他的变量名简直就是德语单词,看起来完全自然。 – matt