在Swift中不止一次按下按钮

Question

当我在应用程序中多次按下按钮时，它会在AppDelegate中出现错误。

Thread 1: signal SIGABRT

这是我按钮的代码。如果您有任何疑问，请确保告诉我！

//import Firebase
//import SVProgressHUD
//import UIKit
@IBAction func logInPressed(_ sender: AnyObject) {
    if emailTextField.text != "" || passwordTextField.text != "" {
        FirebaseApp.configure()
        Auth.auth().signIn(withEmail: emailTextField.text!, password: passwordTextField.text!) {
            (user, error) in
            SVProgressHUD.show()
            if error != nil {
                print(error!)
                self.incorrect.isHidden = false
                SVProgressHUD.dismiss()
            } else {
                self.incorrect.isHidden = true
                SVProgressHUD.dismiss()
                self.performSegue(withIdentifier: "Segue9", sender: self)
            }
        }
    } else {
        incorrect.isHidden = false
    }
}

Answer 1

firebaseapp.configure((需要在 application：didfinishlaunchingwithoptions上调用：函数从 appdelegate appdelegate

可能发生崩溃，因为您正在调用两次。