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處理新 Firebase 和 Swift 中的錯誤

[英]Handling Errors in New Firebase and Swift

我正在嘗試使用 swift 和 firebase 在 iOS 項目中創建用戶按鈕時添加錯誤處理:

這是按鈕的代碼:

     @IBAction func Register(sender: AnyObject) {

    if NameTF.text == "" || EmailTF.text == "" || PasswordTF.text == "" || RePasswordTF == "" || PhoneTF.text == "" || CityTF.text == ""
    {
        let alert = UIAlertController(title: "عذرًا", message:"يجب عليك ملىء كل الحقول المطلوبة", preferredStyle: .Alert)
        alert.addAction(UIAlertAction(title: "نعم", style: .Default) { _ in })
        self.presentViewController(alert, animated: true){}

    } else {

        if PasswordTF.text != RePasswordTF.text {
            let alert = UIAlertController(title: "عذرًا", message:"كلمتي المرور غير متطابقتين", preferredStyle: .Alert)
            alert.addAction(UIAlertAction(title: "نعم", style: .Default) { _ in })
            self.presentViewController(alert, animated: true){}

        } else {


            FIRAuth.auth()?.createUserWithEmail(EmailTF.text!, password: PasswordTF.text!, completion: { user, error in
                print(error)

                if error != nil {

                    let errorCode = FIRAuthErrorNameKey

                    switch errorCode {
                    case "FIRAuthErrorCodeEmailAlreadyInUse":
                        let alert = UIAlertController(title: "عذرًا", message:"الإيميل مستخدم", preferredStyle: .Alert)
                        alert.addAction(UIAlertAction(title: "نعم", style: .Default) { _ in })
                        self.presentViewController(alert, animated: true){}

                    case "FIRAuthErrorCodeUserNotFound":
                        let alert = UIAlertController(title: "عذرًا", message:"المستخدم غير موجود", preferredStyle: .Alert)
                        alert.addAction(UIAlertAction(title: "نعم", style: .Default) { _ in })
                        self.presentViewController(alert, animated: true){}

                    case "FIRAuthErrorCodeInvalidEmail":
                        let alert = UIAlertController(title: "عذرًا", message:"الإيميل غير صحيح", preferredStyle: .Alert)
                        alert.addAction(UIAlertAction(title: "نعم", style: .Default) { _ in })
                        self.presentViewController(alert, animated: true){}

                    case "FIRAuthErrorCodeNetworkError":
                        let alert = UIAlertController(title: "عذرًا", message:"خطأ في الاتصال بالانترنت", preferredStyle: .Alert)
                        alert.addAction(UIAlertAction(title: "نعم", style: .Default) { _ in })
                        self.presentViewController(alert, animated: true){}

                    default:
                        let alert = UIAlertController(title: "عذرًا", message:"خطأ غير معروف", preferredStyle: .Alert)
                        alert.addAction(UIAlertAction(title: "نعم", style: .Default) { _ in })
                        self.presentViewController(alert, animated: true){}



                    }


                } else {

                    FIRAuth.auth()?.signInWithEmail(self.EmailTF.text!, password: self.PasswordTF.text!, completion: { (user: FIRUser?, error: NSError?) in
                        if let error = error {
                            print(error.localizedDescription)
                        } else {

                           self.ref.child("UserProfile").child(user!.uid).setValue([
                                "email": self.EmailTF.text!,
                                "name" : self.NameTF.text!,
                                "phone": self.PhoneTF.text!,
                                "city" : self.CityTF.text!,
                                ])
                            print("Sucess")
                          //  self.performSegueWithIdentifier("SignUp", sender: nil)

                        }
                    })

                } //else
            })

        } //Big else


    } //Big Big else
}


}//end of

我不確定 switch 語句中錯誤的語法是否正確!

因為當我在模擬器中測試它時,它總是給我默認情況,這是未知錯誤! + 我在文檔中找不到語法: https : //firebase.google.com/docs/auth/ios/errors

那么,使用新的 firebase 和 swift 添加錯誤處理的正確語法是什么!

實際上,我已經為此苦苦掙扎了很長時間,並發現了問題所在。 我已經嘗試了上面答案中發布的代碼,error.code 行給了我一個錯誤。 不過,它確實與 error._code 一起工作。 換句話說,對保羅的原始答案略有修改。 這是我的最終代碼(不過我會針對所有錯誤對其進行編輯):

if let errCode = AuthErrorCode(rawValue: error!._code) {

    switch errCode {
        case .errorCodeInvalidEmail:
            print("invalid email")
        case .errorCodeEmailAlreadyInUse:
            print("in use")
        default:
            print("Create User Error: \(error)")
    }    
}

為 Swift 4 + Firebase 4 + UIAlertController 更新

extension AuthErrorCode {
    var errorMessage: String {
        switch self {
        case .emailAlreadyInUse:
            return "The email is already in use with another account"
        case .userNotFound:
            return "Account not found for the specified user. Please check and try again"
        case .userDisabled:
            return "Your account has been disabled. Please contact support."
        case .invalidEmail, .invalidSender, .invalidRecipientEmail:
            return "Please enter a valid email"
        case .networkError:
            return "Network error. Please try again."
        case .weakPassword:
            return "Your password is too weak. The password must be 6 characters long or more."
        case .wrongPassword:
            return "Your password is incorrect. Please try again or use 'Forgot password' to reset your password"
        default:
            return "Unknown error occurred"
        }
    }
}


extension UIViewController{
    func handleError(_ error: Error) {
        if let errorCode = AuthErrorCode(rawValue: error._code) {
            print(errorCode.errorMessage)
            let alert = UIAlertController(title: "Error", message: errorCode.errorMessage, preferredStyle: .alert)

            let okAction = UIAlertAction(title: "Ok", style: .default, handler: nil)

            alert.addAction(okAction)

            self.present(alert, animated: true, completion: nil)

        }
    }

}

用法示例:

    Auth.auth().signIn(withEmail: email, password: password, completion: { (user, error) in

        if error != nil {
            print(error!._code)
            self.handleError(error!)      // use the handleError method
            return
        }
        //successfully logged in the user

    })

盡管這已得到正確回答,但還是想分享一個很好的實現,為此我們添加到我們的項目中。

這也可以用於其他錯誤類型,但我們只需要它用於FIRAuthErrorCodes

如果您將 FIRAuthErrorCode 擴展為具有字符串類型的變量 errorMessage,則您可以為用戶提供自己的錯誤消息:

extension FIRAuthErrorCode {
    var errorMessage: String {
        switch self {
        case .errorCodeEmailAlreadyInUse:
            return "The email is already in use with another account"
        case .errorCodeUserDisabled:
            return "Your account has been disabled. Please contact support."
        case .errorCodeInvalidEmail, .errorCodeInvalidSender, .errorCodeInvalidRecipientEmail:
            return "Please enter a valid email"
        case .errorCodeNetworkError:
            return "Network error. Please try again."
        case .errorCodeWeakPassword:
            return "Your password is too weak"
        default:
            return "Unknown error occurred"
        }
    }
}

您可以只自定義我們上面的一些內容,並將其余內容分組在“未知錯誤”下。

使用此擴展程序,您可以處理 Vladimir Romanov 的回答中所示的錯誤:

func handleError(_ error: Error) {
    if let errorCode = FIRAuthErrorCode(rawValue: error._code) {
        // now you can use the .errorMessage var to get your custom error message
        print(errorCode.errorMessage)
    }
}

FIRAuthErrorCode 是一個 int 枚舉而不是一個字符串枚舉。 執行以下操作:

if let error = error {
        switch FIRAuthErrorCode(rawValue: error.code) !{
                case .ErrorCodeInvalidEmail:

答案中的更多信息。

我正在使用 Swift 5 和 Firebase 6.4.0,對我來說,以上都沒有真正奏效。 在嘗試了一下之后,我想出了這個:

Auth.auth().createUser(withEmail: emailTextfield.text!, password: passwordTextfield.text!) { (user, error) in
        if error!= nil{

                let alert = UIAlertController(title: "Error", message: error!.localizedDescription, preferredStyle: .alert)
                let okAction = UIAlertAction(title: "Ok", style: .default, handler: nil)
                alert.addAction(okAction)
                self.present(alert,animated: true)

        }

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