Question

我尝试对注册视图控制器进行编程，并使用UIPickerView进行国家/地区选择。问题是，当我试图将选择器国家传递给Parse以保存输入时，Xcode给我一个错误。为什么Xcode不允许我使用所选数据进行解析？错误在最后一行。

任何帮助人员？

@IBOutlet var usernameTextField: UITextField!
@IBOutlet var fullnameTextField: UITextField!
@IBOutlet var emailTextField: UITextField!
@IBOutlet var passwordTextField: UITextField!
@IBOutlet var phonenumberTextField: UITextField!
@IBOutlet var countryPicker: UIPickerView!

let countryData: [String] = ["Saudi Arabia", "Turkey"]

@available(iOS 2.0, *)
public func numberOfComponents(in pickerView: UIPickerView) -> Int {
    return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
    return countryData.count
}


func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
    let countrySelect = countryData[row]
    print(countrySelect)
}

override func viewDidLoad() {
    super.viewDidLoad()

    countryPicker.dataSource = self
    countryPicker.delegate = self


    // Do any additional setup after loading the view.

}


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



@IBAction func signUpAction(sender: AnyObject) {

    // Declare user object
    let newUser = PFUser()

    let fullName = fullnameTextField.text!
    let username = usernameTextField.text!
    let email:String = emailTextField.text!
    let password:String = passwordTextField.text!
    let phoneNumber:Int? = Int(phonenumberTextField.text!)

    // Passing arguments
    newUser.username = username
    newUser["fullName"] = fullName
    newUser.email = email
    newUser.password = password
    newUser["phoneNumber"] = phoneNumber! as Int
    newUser["country"] = countryData [row]

Answer 1

根据您的comment错误是“未解析的标识符行”：

您永远不会声明名为row的变量，但您正在使用它。您可以使用正确的数组索引替换此未定义变量的使用，该索引将为您提供countryData变量中的国家/或者确保在您的函数中实际声明并可访问该行。

无法从UIPickerView保存数据

1 个答案: