即使显示出Firebase登录中发生错误，我的Swift代码也会执行segue

Question

This is my code, the first part (Auth.auth.signin) is authenticating with Firebase if the emailId and password is correct. After that, if incorrect, it print incorrect. This part does show up in the console. However, the code performs the segue even though it is not supposed to. Why is this?

@IBAction func loginPressed(_ sender: Any) {
    //TODO: Log in the user
    Auth.auth().signIn(withEmail: emailTextfield.text!, password: passwordTextfield.text!) { (user, error) in
        print(error!)

        if(error != nil || user == nil){
            print("incorrect signin")
        }
        else{
            self.performSegue(withIdentifier: "goToChat", sender: self)
            print("Login was good")

        }
    }
}

Answer 1

Looks like you have assigned Segue from button. Remove the older one and create new Segue like shown below:

And add identifier for Segue .

Answer 2

You have done segue from your button. Remove it and add Segue from View Controller to view controller.