处理新Firebase和Swift中的错误

我正在尝试使用swift和firebase在iOS项目中创建用户按钮时添加error handling：

这是按钮的代码：

@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 

我不确定switch语句中的错误语法是否正确！

因为当我在模拟器中测试它时它总是给我一个未知错误的defualt案例！ +我在文档中找不到语法： https ： //firebase.google.com/docs/auth/ios/errors

那么，使用新的firebase和swift添加error handling的正确语法是什么！

Answer 1

我实际上只是在相当长的一段时间内努力解决这个问题。 我已经尝试了上面的答案中发布的代码，error.code行给了我一个错误。 它确实与error._code一起使用。 换句话说，对保罗的原始答案有一点点修改。 这是我的最终代码（我将编辑所有错误）：

 if let errCode = FIRAuthErrorCode(rawValue: error!._code) { switch errCode { case .errorCodeInvalidEmail: print("invalid email") case .errorCodeEmailAlreadyInUse: print("in use") default: print("Create User Error: \(error)") } } 

Answer 2

尽管已经正确回答了这个问题，但我想为此分享一个很好的实现，我们将其添加到我们的项目中。

这也可以用于其他错误类型，但我们只需要FIRAuthErrorCodes 。

如果您将FIRAuthErrorCode扩展为具有string类型的变量errorMessage，则可以为用户提供自己的错误消息：

 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" } } } 

您可以自定义上面的一些，并将其余部分分组为“未知错误”。

使用此扩展，您可以处理错误，如Vladimir Romanov的回答所示：

 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) } } 

Answer 3

更新了Swift 4 + Firebase 4 + UIAlertController

 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 }) 

Answer 4

FIRAuthErrorCode是一个int枚举，而不是一个字符串枚举。 请执行下列操作：

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

更多信息在这个答案 。