Firebase Phone Auth使應用程序崩潰

Question

我希望這個問題不會重復，因為我找不到類似的東西。

我有兩個視圖控制器：

NEWPhoneAuthViewController

NEWVerifyCodeViewController

NEWPhoneAuthViewController代碼：

        import UIKit
import Firebase

class NEWPhoneAuthViewController: UIViewController {

    @IBOutlet weak var phoneTxtField: UITextField!

    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 submitPressed(_ sender: Any) {

        let phoneNumber = phoneTxtField.text!

        PhoneAuthProvider.provider().verifyPhoneNumber(phoneNumber, uiDelegate: nil, completion: { (verificationID, error) in

            if let error = error {
                debugPrint(error.localizedDescription)
                return
            }

            guard let verificationID = verificationID else { return }
            print("Verification ID")
            print(verificationID)
            let verifyScene = NEWVerifyCodeViewController()
            verifyScene.verificationID = verificationID

            self.performSegue(withIdentifier: "toCodefromPhoneAuth", sender: nil)
            //self.navigationController?.pushViewController(verifyScene, animated: true)
        })

    }


}

而我的NEWVerifyCodeViewController代碼是：

    import UIKit
import Firebase

class NEWVerifyCodeViewController: UIViewController {

    @IBOutlet weak var codeTxtField: UITextField!

    var verificationID:String?

    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 verifyPressed(_ sender: Any) {
        if let verificationCode = codeTxtField.text {
            let credential = PhoneAuthProvider.provider().credential(withVerificationID: verificationID!, verificationCode: verificationCode)
            Auth.auth().signIn(with: credential) { (user, error) in
                if let error = error {
                    debugPrint(error.localizedDescription)
                }else {
                    debugPrint("Verified successfully")

                    print("Navigating to SignUp")

                    //self.performSegue(withIdentifier: "toSignUpfromCode", sender: nil)

                    //let newSignUp = NEWSignUp()
                    //self.navigationController?.pushViewController(newSignUp, animated: true)

                    //self.performSegue(withIdentifier: "toSignUpFromPhone", sender: nil)
                    //Once you have verified your phone number kill the firebase session.
                    //try? Auth.auth().signOut()

                }
            }
        }
    }
}

現在的問題是：當我點擊NEWVerifyCodeViewController中的驗證按鈕時，應用崩潰了，

筆記：

• 我打印了驗證ID，但不為NULL。
• 我打印了用戶收到的代碼，它不是NULL。

因此，我不確定為什么會發生這種情況，並且在點擊之后，我的控制台沒有顯示任何錯誤，除了以下幾點：

Answer 1

因此，我做了一個小調整，使我的項目正常工作。

我在NEWPhoneAuthViewController更改了此部分：

let verifyScene = NEWVerifyCodeViewController()
verifyScene.verificationID = verificationID

至：

首先創建一個名為gVerificationID的全局變量，並將其設置為：

gVerificationID = verificationID

就是這樣，不確定是否是最佳實踐，也不確定為什么第一個代碼不起作用，但這就是我解決的方法。