Ios firebase错误代码赢得'；我没有出现

我尝试为登录设置错误代码，例如，一个用户想要输入他的个人资料，但输入了错误的密码，他会得到通知，他输入了错误的密码。。。但是如果我尝试它，它只会将我带到正常的提要页面，而没有登录，因此错误代码甚至不会显示

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

        if error != nil {
            print(error ?? "")
            if let errorCode = AuthErrorCode(rawValue: error!._code) {
                switch errorCode {
                case .invalidEmail:
                    print("invalid email")
                    let alertMessage = UIAlertController(title: "Email is invalid", message: "Use upper and lower characters along with numbers", preferredStyle: .alert)
                    alertMessage.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action) in
                        alertMessage.dismiss(animated: true, completion: nil)
                    }))
                    self.present(alertMessage, animated: true, completion: nil)

                case .accountExistsWithDifferentCredential:
                    print("wrong credential")
                    let alertMessage = UIAlertController(title: "Wrong Information", message: "The Account exists with different Credentials than entered from you", preferredStyle: .alert)
                    alertMessage.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action) in
                        alertMessage.dismiss(animated: true, completion: nil)
                    }))
                    self.present(alertMessage, animated: true, completion: nil)

                case .wrongPassword:
                    print("wrong password")
                    let alertMessage = UIAlertController(title: "Password is wrong", message: "Please enter the correct password for your account", preferredStyle: .alert)
                    alertMessage.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action) in
                        alertMessage.dismiss(animated: true, completion: nil)
                    }))
                    self.present(alertMessage, animated: true, completion: nil)

                default:
                    print("Other error!")
                    let alertMessage = UIAlertController(title: "Ouhhhh", message: "It seems like something went wrong. Please try again later.", preferredStyle: .alert)
                    alertMessage.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action) in
                        alertMessage.dismiss(animated: true, completion: nil)
                    }))
                    self.present(alertMessage, animated: true, completion: nil)
                }

            }
            return
        } else {
        //successfully logged in our user
        self.messagesController?.fetchUserAndSetupNavBarTitle()
        self.performSegue(withIdentifier: "showJobs", sender: nil)
        SVProgressHUD.dismiss()
        }})

---

有人能帮我吗？自firebase 5以来，似乎有一些变化，但我没有发现这方面的任何变化。正确获取错误代码

为了正确获取错误代码，您需要将Swifterror转换为NSError

您可以使用以下代码：

if error != nil {
     let ns_error = error! as NSError
     print(ns_error.code)
}

2。在主线程的完成块上执行与UI相关的任务

case .invalidEmail:
    print("invalid email")
    DispatchQueue.main.async {
               // Update UI elements here
               let alertMessage = UIAlertController(title: "Email is invalid", message: "Use upper and lower characters along with numbers", preferredStyle: .alert)
               alertMessage.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action) in
                   alertMessage.dismiss(animated: true, completion: nil)
               }))
               self.present(alertMessage, animated: true, completion: nil)
    }

您需要在主线程中处理所有警报和与UI相关的情况

尝试在显示警报之前添加延迟

func delayExecution(seconds delay:Double, closure:@escaping ()->()) {
    DispatchQueue.main.asyncAfter(
        deadline: DispatchTime.now() + Double(Int64(delay * Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC), execute: closure)
}

---

这里有印刷品吗<代码>打印（错误？？）是的，但我没有得到警报，而是被呈现给第二个vcIt，这意味着它不会进入if状态。如果您打印

authorrorcode（rawValue:error.\u code）

您有什么吗？例如，如果它打印一个数组，这意味着您需要循环到数组中以找到一个值OK nice，谢谢，我现在明白我的问题是什么了，但遗憾的是，我得到的AlertController作为错误不在窗口层次结构中。。。我在viewDidLoad（）中读到一些我需要调用警报的内容，但在我的情况下我应该如何做？您是否在viewDidLoad（）中处理此登录逻辑？不，我在按下按钮时执行此操作。。。当我在viewDidLoad中调用该函数时，当视图出现时，我会立即收到所有警报尝试在显示警报之前添加1-3秒的延迟，以查看其是否有效。我已经用您可以使用的延迟函数更新了答案。添加了它，但没有更改：/Windows层次结构的错误与以前相同