应用程序因 Firebase 电话身份验证而崩溃答案

【问题标题】：App crashes with Firebase Phone Auth应用程序因 Firebase 电话身份验证而崩溃
【发布时间】：2018-08-20 14:21:33
【问题描述】：

我希望这个问题不要重复，因为我找不到任何类似的东西。

我有两个视图控制器：

NEWPhoneAuthViewController

NEWVerifyCodeViewController

NEWPhoneAuthViewController 代码：

        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)
        })

    }


}

我的 NEWVerifyCodeViewController 代码是：

    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()

                }
            }
        }
    }
}

现在的问题是：当我点击 NEWVerifyCodeViewController 中的验证按钮时，应用程序崩溃了，

注意事项：

我打印了验证 ID，它不是 NULL。
我打印了用户收到的代码，它不为 NULL。

所以我不确定为什么会发生这种情况，我的控制台在点击后没有显示任何错误，除了这些：

【问题讨论】：

标签： ios firebase-authentication swift4 ios11 xcode9

【解决方案1】：

所以我做了一个小调整，使我的项目正常工作。

我在NEWPhoneAuthViewController中更改了这部分：

let verifyScene = NEWVerifyCodeViewController()
verifyScene.verificationID = verificationID

到：

首先创建了一个名为：gVerificationID 的全局变量并将其设置为：

gVerificationID = verificationID

就是这样，不确定这是否是最佳实践，也不确定为什么第一个代码不起作用，但这就是我修复它的方法。

【讨论】：