如何从Firebase auth登录的NSError中获取错误消息

Question

当我尝试打印firebase用户登录的可读，userfrendly错误消息时，我发现我无法使用NSError.localizedDiscreption casue它将显示“查找详细信息”。

当我使用print(error)命令时，我的错误消息如下所示

2016-05-23 21:29:33.035 Mission Board[3251:] <FIRAnalytics/INFO> Firebase Analytics enabled

Optional(Error Domain=FIRAuthErrorDomain Code=17999 "An internal error has occurred, print and inspect the error details for more information." UserInfo={NSUnderlyingError=0x1277e2bb0 {Error Domain=FIRAuthInternalErrorDomain Code=3 "(null)" UserInfo={FIRAuthErrorUserInfoDeserializedResponseKey=<CFBasicHash 0x1288eec60 [0x1a172a150]>{type = immutable dict, count = 3,

entries =>

    0 : <CFString 0x12890ad60 [0x1a172a150]>{contents = "message"} = <CFString 0x1288eec20 [0x1a172a150]>{contents = "INVALID_EMAIL"}

    1 : errors = <CFArray 0x12890ad20 [0x1a172a150]>{type = immutable, count = 1, values = (

    0 : <CFBasicHash 0x12890c660 [0x1a172a150]>{type = immutable dict, count = 3,

entries =>

    0 : reason = invalid

    1 : message = <CFString 0x128872790 [0x1a172a150]>{contents = "INVALID_EMAIL"}

    2 : domain = global

}



)}

    2 : code = <CFNumber 0xb000000000001903 [0x1a172a150]>{value = +400, type = kCFNumberSInt64Type}

}

}}, error_name=ERROR_INTERNAL_ERROR, NSLocalizedDescription=An internal error has occurred, print and inspect the error details for more information.})

这不是很可读但我在条目1代码0中找到，有一条内容为“INVALID EMAIL”的消息

我可以将该部分输出到用户的警报吗？

是否有内置功能可以做到这一点？

Answer 1

下面的代码是我的注册错误控制。 我使用KVNProgress pod进行提醒。

Swift3

import KVNProgress

FIRAuth.auth()?.createUser(withEmail: self.emailTextLbl.text!, password: self.passwordTextLbl.text!, completion: { (user, error) in

if error != nil {

    let error2:NSError = error as! NSError

    if error2.code == FIRAuthErrorCode.errorCodeInvalidEmail.rawValue {

         KVNProgress.showError(withStatus: "Invalid Email", completion: nil)

    }else if error2.code == FIRAuthErrorCode.errorCodeNetworkError.rawValue {

     KVNProgress.showError(withStatus: "Network Error", completion: nil)

    }else if error2.code == FIRAuthErrorCode.errorCodeWeakPassword.rawValue {

     KVNProgress.showError(withStatus: "Weak Password", completion: nil)

    }else if error2.code == FIRAuthErrorCode.errorCodeEmailAlreadyInUse.rawValue {

     KVNProgress.showError(withStatus: "Email Already In Use", completion: nil)

    }


}else{


    // Your code


}

 })

您可以在“FIRAuthErrorCode”中找到其他错误控件，例如登录错误处理。