Question

我正在使用X-code 9 beta Swift 4，并且可以运行和构建但是会出现以下错误并且仅加载白屏： ***由于未捕获的异常终止应用程序＆＃39; NSInvalidArgumentException＆＃39;，原因：＆＃39; - [myapp.logInVC _finishDecodingLayoutGuideConnections：]：无法识别的选择器发送到实例0x10251ead0＆＃39;

不确定_finishDecodingLayoutGuideConnections是什么？我检查了所有选择器，但没有看到问题。这是一个使用Firebase的登录屏幕，我希望如果登录成功，它将加载View Controller。任何帮助将不胜感激！

class logInVC：UIViewController {

@IBOutlet weak var signInSelector: UISegmentedControl!
@IBOutlet weak var signInLabel: UILabel!
@IBOutlet weak var emailTextField: UITextField!
@IBOutlet weak var passwordTextField: UITextField!

var isSignIn:Bool = true

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 signInSelectorChanged(_ sender: UISegmentedControl) {

    switch signInSelector.selectedSegmentIndex
    {
    case 0:
        signInLabel.text = "sign in";
    case 1:
        signInLabel.text = "create account";
    default:
        break
    }
}



@IBAction func signInButtonTapped(_ sender: UIButton) {
    if isSignIn {
        //validation
        if let email = emailTextField.text, let pass = passwordTextField.text
        {
            //sign in with Firebase
            Auth.auth().signIn(withEmail: email, password: pass) { (user, error) in
                // make sure user isn't nil
                if user != nil {
                    //user is found, go to AR experience
                    self.performSegue(withIdentifier: "goToHome" , sender: self)
                }
                else {
                    //error, check error and show message

                }
            }
        }
        else {
            //register with Firebase
            Auth.auth().createUser(withEmail: emailTextField.text!, password: passwordTextField.text!) { (user, error) in
                // make sure user isn't nil
                if user != nil {
                    //user is found, go to AR experience
                    self.performSegue(withIdentifier: "goToHome" , sender: self)
                }
                else {
                    //error, check error, and show message
                }
            }

Answer 1

检查您的IBOutlets和IBActions是否正确连接。未正确设置XiB和Class文件时发生错误。

崩溃：_finishDecodingLayoutGuideConnections：]无法识别的选择器发送到实例

1 个答案: