由于未捕获的异常 Swift 而终止应用程序

Question

我目前有登录身份验证工作，以及在Firebase注册。我现在想让我的用户保持登录状态，这正在工作。我面临的问题是当我注销时，我尝试重新登录，但收到此错误： 由于未捕获的异常"NSInvalidArgumentException"而终止应用程序，原因："接收器 (( 没有标识符为"聊天室"的 segue"\ 这没有意义，因为当我第一次登录时，它会使用聊天室 segue 将我带到 ChatRoom Viewcontroller。

这是我下面的代码：

func handleLogin() {
guard let email = emailTextField.text, let password = passwordTextField.text
else {
print("Form is not valid")
return
}
Auth.auth().signIn(withEmail: email, password: password, completion: { (user, error) in
if error != nil {
print(error!.localizedDescription)
self.loginErrorAlert("Error!", message: "Username or password incorrect, please try again.")
return
}
// successfully logged in our user and keep user logged in until they logout
if Auth.auth().currentUser != nil {
UserDefaults.standard.set(Auth.auth().currentUser!.uid, forKey: "loggedIn")
UserDefaults.standard.synchronize()
self.performSegue(withIdentifier: "chatRoom", sender: self)// this is the error I am facing
}
})
}
func handleRegister() {
guard let email = emailTextField.text, let password = passwordTextField.text, let name = nameTextField.text else {
print("Form is not valid")
signupErrorAlert("Error!", message: "Could not be Registered at this time, please try again.")
return
}
Auth.auth().createUser(withEmail: email, password: password, completion: { (user: User?, error) in
if error != nil {
print(error!.localizedDescription)
self.loginErrorAlert("Error!", message: "Could not be Registered at this time, please try again later.")
return
}
guard let uid = user?.uid else {
return
}
// successfully authenticated user and keep logged in until they logout
let ref = Database.database().reference(fromURL: "https://boccighub.firebaseio.com/")
let usersReference = ref.child("users").child(uid)
let values = ["name": name, "email": email]
usersReference.updateChildValues(values, withCompletionBlock: { (err, ref) in
if err != nil {
print(err!.localizedDescription)
return
}
if Auth.auth().currentUser != nil {
UserDefaults.standard.set(Auth.auth().currentUser!.uid, forKey: "loggedIn")
UserDefaults.standard.synchronize()
self.performSegue(withIdentifier: "chatRoom", sender: self)
}
})
})
}
// User logged out
@IBAction func handleLogout(_ sender: Any) {
do {
try Auth.auth().signOut()
print("user signedout")
if Auth.auth().currentUser == nil {
print("No user, key removed")
UserDefaults.standard.removeObject(forKey: "loggedIn")
UserDefaults.standard.synchronize()
print("User logged out")
let loginController = LoginViewController()
present(loginController, animated: true, completion: nil)
}
} catch let logoutError {
print(logoutError)
}
}

Answer 1

固定。我删除了让登录控制器 = 登录视图控制器((， 我创建了一个新的 segue，现在做 self.performSegue(带有标识符："logOut"，发件人：self(，工作完美