Opis kodów błędów NSURLErrorDomain Opis

Question

To jest moje pierwsze doświadczenie w tworzeniu aplikacji ios. Próbuję opublikować niektóre dane za pomocą api interfejsu Facebook. Ja ciągle otrzymuję następujący błąd:

The operation couldn’t be completed. (NSURLErrorDomain error 400.) 

nie mogę w stanie znaleźć opis kodów błędów NSURLErrorDomain. Co oznacza kod błędu 400?

Answer 1

W NSURLErrorDomain kody błędów są tutaj wymienione https://developer.apple.com/documentation/foundation/1508628-url_loading_system_error_codes

Jednak jest tylko kod stanu HTTP (http://www.w3.org/Protocols/HTTP/HTRESP.html) są zwracane, co oznacza, że ​​masz coś nie tak ze swoim życzeniem.

Answer 2

Otrzymałem komunikat o błędzie Domena = NSURLErrorDomain Code = -1011 podczas korzystania z funkcji Parse i podania nieprawidłowego klucza klienta. Jak tylko to poprawiłem, zaczęło działać.

Answer 3

Podczas tworzenia w Swift nie mogłem znaleźć nazwy błędu dla danego kodu. Z tego powodu wklej minus kody NSURLErrorDomain zaczerpnięte z NSURLError.h

/*! 
    @enum NSURL-related Error Codes 
    @abstract Constants used by NSError to indicate errors in the NSURL domain 
*/ 
NS_ENUM(NSInteger) 
{ 
    NSURLErrorUnknown =    -1, 
    NSURLErrorCancelled =   -999, 
    NSURLErrorBadURL =    -1000, 
    NSURLErrorTimedOut =   -1001, 
    NSURLErrorUnsupportedURL =   -1002, 
    NSURLErrorCannotFindHost =   -1003, 
    NSURLErrorCannotConnectToHost =   -1004, 
    NSURLErrorNetworkConnectionLost =  -1005, 
    NSURLErrorDNSLookupFailed =   -1006, 
    NSURLErrorHTTPTooManyRedirects =  -1007, 
    NSURLErrorResourceUnavailable =   -1008, 
    NSURLErrorNotConnectedToInternet =  -1009, 
    NSURLErrorRedirectToNonExistentLocation = -1010, 
    NSURLErrorBadServerResponse =  -1011, 
    NSURLErrorUserCancelledAuthentication =  -1012, 
    NSURLErrorUserAuthenticationRequired = -1013, 
    NSURLErrorZeroByteResource =  -1014, 
    NSURLErrorCannotDecodeRawData =    -1015, 
    NSURLErrorCannotDecodeContentData =   -1016, 
    NSURLErrorCannotParseResponse =    -1017, 
    NSURLErrorAppTransportSecurityRequiresSecureConnection NS_ENUM_AVAILABLE(10_11, 9_0) = -1022, 
    NSURLErrorFileDoesNotExist =  -1100, 
    NSURLErrorFileIsDirectory =   -1101, 
    NSURLErrorNoPermissionsToReadFile =  -1102, 
    NSURLErrorDataLengthExceedsMaximum NS_ENUM_AVAILABLE(10_5, 2_0) = -1103, 

    // SSL errors 
    NSURLErrorSecureConnectionFailed =  -1200, 
    NSURLErrorServerCertificateHasBadDate =  -1201, 
    NSURLErrorServerCertificateUntrusted = -1202, 
    NSURLErrorServerCertificateHasUnknownRoot = -1203, 
    NSURLErrorServerCertificateNotYetValid = -1204, 
    NSURLErrorClientCertificateRejected = -1205, 
    NSURLErrorClientCertificateRequired = -1206, 
    NSURLErrorCannotLoadFromNetwork =  -2000, 

    // Download and file I/O errors 
    NSURLErrorCannotCreateFile =  -3000, 
    NSURLErrorCannotOpenFile =   -3001, 
    NSURLErrorCannotCloseFile =   -3002, 
    NSURLErrorCannotWriteToFile =  -3003, 
    NSURLErrorCannotRemoveFile =  -3004, 
    NSURLErrorCannotMoveFile =   -3005, 
    NSURLErrorDownloadDecodingFailedMidStream = -3006, 
    NSURLErrorDownloadDecodingFailedToComplete =-3007, 

    NSURLErrorInternationalRoamingOff NS_ENUM_AVAILABLE(10_7, 3_0) =   -1018, 
    NSURLErrorCallIsActive NS_ENUM_AVAILABLE(10_7, 3_0) =     -1019, 
    NSURLErrorDataNotAllowed NS_ENUM_AVAILABLE(10_7, 3_0) =     -1020, 
    NSURLErrorRequestBodyStreamExhausted NS_ENUM_AVAILABLE(10_7, 3_0) =  -1021, 

    NSURLErrorBackgroundSessionRequiresSharedContainer NS_ENUM_AVAILABLE(10_10, 8_0) = -995, 
    NSURLErrorBackgroundSessionInUseByAnotherProcess NS_ENUM_AVAILABLE(10_10, 8_0) = -996, 
    NSURLErrorBackgroundSessionWasDisconnected NS_ENUM_AVAILABLE(10_10, 8_0)= -997, 
}; 

Answer 4

w Swift 3. Oto opis kodów błędów NSURLErrorDomain w Swift 3 enum: (skopiowany z powyższej odpowiedzi i przekonwertowany, co mogę).

enum NSURLError: Int { 
    case unknown = -1 
    case cancelled = -999 
    case badURL = -1000 
    case timedOut = -1001 
    case unsupportedURL = -1002 
    case cannotFindHost = -1003 
    case cannotConnectToHost = -1004 
    case connectionLost = -1005 
    case lookupFailed = -1006 
    case HTTPTooManyRedirects = -1007 
    case resourceUnavailable = -1008 
    case notConnectedToInternet = -1009 
    case redirectToNonExistentLocation = -1010 
    case badServerResponse = -1011 
    case userCancelledAuthentication = -1012 
    case userAuthenticationRequired = -1013 
    case zeroByteResource = -1014 
    case cannotDecodeRawData = -1015 
    case cannotDecodeContentData = -1016 
    case cannotParseResponse = -1017 
    //case NSURLErrorAppTransportSecurityRequiresSecureConnection NS_ENUM_AVAILABLE(10_11, 9_0) = -1022 
    case fileDoesNotExist = -1100 
    case fileIsDirectory = -1101 
    case noPermissionsToReadFile = -1102 
    //case NSURLErrorDataLengthExceedsMaximum NS_ENUM_AVAILABLE(10_5, 2_0) = -1103 

    // SSL errors 
    case secureConnectionFailed = -1200 
    case serverCertificateHasBadDate = -1201 
    case serverCertificateUntrusted = -1202 
    case serverCertificateHasUnknownRoot = -1203 
    case serverCertificateNotYetValid = -1204 
    case clientCertificateRejected = -1205 
    case clientCertificateRequired = -1206 
    case cannotLoadFromNetwork = -2000 

    // Download and file I/O errors 
    case cannotCreateFile = -3000 
    case cannotOpenFile = -3001 
    case cannotCloseFile = -3002 
    case cannotWriteToFile = -3003 
    case cannotRemoveFile = -3004 
    case cannotMoveFile = -3005 
    case downloadDecodingFailedMidStream = -3006 
    case downloadDecodingFailedToComplete = -3007 

    /* 
    case NSURLErrorInternationalRoamingOff NS_ENUM_AVAILABLE(10_7, 3_0) =   -1018 
    case NSURLErrorCallIsActive NS_ENUM_AVAILABLE(10_7, 3_0) =     -1019 
    case NSURLErrorDataNotAllowed NS_ENUM_AVAILABLE(10_7, 3_0) =     -1020 
    case NSURLErrorRequestBodyStreamExhausted NS_ENUM_AVAILABLE(10_7, 3_0) =  -1021 

    case NSURLErrorBackgroundSessionRequiresSharedContainer NS_ENUM_AVAILABLE(10_10, 8_0) = -995 
    case NSURLErrorBackgroundSessionInUseByAnotherProcess NS_ENUM_AVAILABLE(10_10, 8_0) = -996 
    case NSURLErrorBackgroundSessionWasDisconnected NS_ENUM_AVAILABLE(10_10, 8_0)= -997 
    */ 
}