Question

再次回到noob问题。

出于某种原因，我收到以下错误：

2017-07-25 14:29：00.589401 + 0200 Yiives [1416：534883] ***由于未捕获的异常'NSUnknownKeyException'终止应用程序，原因：'[setValue：forUndefinedKey：]：此类不是键值符合编码的关键UserEmailAdresLogin。'

现在我想以绿色方式自己看问题，所以请赐教。

它不会让我加载登录视图。那我怎么能实现呢？D

我运行以下代码：

import UIKit

class LoginViewController: UIViewController {

    @IBOutlet weak var BackgroundButton: UIButton!

    @IBOutlet weak var UserEmailAdresInput: UITextField!

    @IBOutlet weak var UserPasswordInput: UITextField!

    @IBOutlet weak var UserLogin: UIButton!

    @IBOutlet weak var UserForgotPassword: UIButton!


    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }

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

    @IBAction func CloseLogin(_ sender: Any) {

        dismiss(animated: true, completion: nil )
    }

    @IBAction func Login(_ sender: Any) {

        let UserEmail = UserEmailAdresInput.text
        let UserPassword = UserPasswordInput.text

        let UserEmailStored = UserDefaults.standard.string(forKey: "UserEmail");

        let UserPasswordStored = UserDefaults.standard.string(forKey: "UserPassword");

        if(UserEmailStored == UserEmail){
            if(UserPasswordStored == UserPassword){

                //Login is succesfull

                UserDefaults.standard.set(true, forKey: "UserLoggedIn")
                UserDefaults.standard.synchronize();

            }


        }
    }

}


If you need the source where the data is bein inserted:

import UIKit

class EntryViewController: UIViewController, UITextFieldDelegate {

    @IBOutlet weak var UserEmailAdresInput: UITextField!

    @IBOutlet weak var UserPasswordInput: UITextField!

    @IBOutlet weak var UserPasswordInputRepeated: UITextField!

    @IBOutlet weak var UserSignUp: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()

        self.UserEmailAdresInput.delegate = self
        self.UserPasswordInput.delegate = self
        self.UserPasswordInputRepeated.delegate = self


    }

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

    //Hide Keyboard upon Touch

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?){
        self.view.endEditing(true)
    }

    //Hide Keyboard upon Return Key
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        if textField == UserEmailAdresInput{
            UserEmailAdresInput.resignFirstResponder()
        } else if textField == UserPasswordInput{
            UserPasswordInput.resignFirstResponder()
        } else {
            UserPasswordInputRepeated.resignFirstResponder()
        }
        return true
    }

    @IBAction func SignUp(_ sender: Any) {

        let UserEmail = UserEmailAdresInput.text;
        let UserPassword = UserPasswordInput.text;
        let UserPasswordRepeated = UserPasswordInputRepeated.text;



        //Check if fields are filled in correctly

        if(UserEmail?.isEmpty == true || UserPassword?.isEmpty == true || UserPasswordRepeated?.isEmpty == true){

            displayAlertMessage(userMessage: "Alle velden moeten ingevuld worden");
            return;
        }

        if UserEmail?.range(of: "@") == nil{
            displayAlertMessage(userMessage: "Vul een legitiem emailadres in");
            return;
        }

        if (UserPassword?.characters.count)! < 5{
            displayAlertMessage(userMessage: "Wachtwoord moet langer zijn dan 5 karakters");
        }

        if(UserPassword != UserPasswordRepeated){

            displayAlertMessage(userMessage: "Wachtwoorden zijn niet gelijk");
            return;
        }

        //Store Data
        UserDefaults.standard.set(UserEmail, forKey: "UserEmail");
        UserDefaults.standard.set(UserPassword, forKey: "UserPassword");
        UserDefaults.standard.synchronize();

        //SignUp Succesfull
        var Alert = UIAlertController(title:"Succesvol aangemeld!", message: "Ga naar je email inbox om je aanmelding te voltooien", preferredStyle: UIAlertControllerStyle.alert);

        let OkAction = UIAlertAction(title:"Ok", style: UIAlertActionStyle.default, handler: nil);

        Alert.addAction(OkAction);
        self.present(Alert, animated: true, completion: nil)


    }

    func displayAlertMessage(userMessage:String){

        var Alert = UIAlertController(title:"Melding", message: userMessage, preferredStyle: UIAlertControllerStyle.alert);

        let OkAction = UIAlertAction(title:"Ok", style: UIAlertActionStyle.default, handler: nil);

        Alert.addAction(OkAction);

        self.present(Alert, animated: true, completion: nil)

    }

}

Answer 1

此错误表示您有一个名为UserEmailAdresLogin的变量链接（我认为在您的情节提要文件中），但您的代码源中不再存在此变量。要检查它，右键单击故事板中的控制器，它将显示链接列表，然后通过单击十字架进行删除。

如果问题不在故事板中，那就是变量名中的拼写错误（顺便说一句：“地址”）。

对于关键的UserEmailAdresLogin，此类不符合键值编码

1 个答案: