Swift Foundation Error Codes

Common error codes from Swift's Foundation framework error domains, including URLError (NSURLErrorDomain) for network and URL loading failures, CocoaError (NSCocoaErrorDomain) for file system and data operations, and POSIXError for POSIX-level system errors surfaced in Swift contexts.

75 codes

• backgroundSessionInUseByAnotherProcess backgroundSessionInUseByAnotherProcess
• backgroundSessionRequiresSharedContainer backgroundSessionRequiresSharedContainer
• backgroundSessionWasDisconnected backgroundSessionWasDisconnected
• badServerResponse badServerResponse
• badURL badURL
• callIsActive callIsActive
• cancelled cancelled
• cannotCloseFile cannotCloseFile
• cannotConnectToHost cannotConnectToHost
• cannotCreateFile cannotCreateFile
• cannotDecodeContentData cannotDecodeContentData
• cannotDecodeRawData cannotDecodeRawData
• cannotFindHost cannotFindHost
• cannotLoadFromNetwork cannotLoadFromNetwork
• cannotMoveFile cannotMoveFile
• cannotOpenFile cannotOpenFile
• cannotParseResponse cannotParseResponse
• cannotRemoveFile cannotRemoveFile
• cannotWriteToFile cannotWriteToFile
• clientCertificateRejected clientCertificateRejected
• clientCertificateRequired clientCertificateRequired
• coderInvalidValue coderInvalidValue
• coderReadCorrupt coderReadCorrupt
• coderValueNotFound coderValueNotFound
• dataNotAllowed dataNotAllowed
• dnsLookupFailed dnsLookupFailed
• downloadDecodingFailedMidStream downloadDecodingFailedMidStream
• downloadDecodingFailedToComplete downloadDecodingFailedToComplete
• executableArchitectureMismatch executableArchitectureMismatch
• executableLoad executableLoad
• executableNotLoadable executableNotLoadable
• executableRuntimeMismatch executableRuntimeMismatch
• fileLocking fileLocking
• fileManagerUnmountBusy fileManagerUnmountBusy
• fileNoSuchFile fileNoSuchFile
• fileReadCorruptFile fileReadCorruptFile
• fileReadInapplicableStringEncoding fileReadInapplicableStringEncoding
• fileReadInvalidFileName fileReadInvalidFileName
• fileReadNoPermission fileReadNoPermission
• fileReadNoSuchFile fileReadNoSuchFile
• fileReadUnknown fileReadUnknown
• fileReadUnsupportedScheme fileReadUnsupportedScheme
• fileWriteFileExists fileWriteFileExists
• fileWriteInapplicableStringEncoding fileWriteInapplicableStringEncoding
• fileWriteInvalidFileName fileWriteInvalidFileName
• fileWriteNoPermission fileWriteNoPermission
• fileWriteOutOfSpace fileWriteOutOfSpace
• fileWriteUnknown fileWriteUnknown
• fileWriteVolumeReadOnly fileWriteVolumeReadOnly
• formattingError formattingError
• internationalRoamingOff internationalRoamingOff
• keyValueValidation keyValueValidation
• networkConnectionLost networkConnectionLost
• notConnectedToInternet notConnectedToInternet
• propertyListReadCorrupt propertyListReadCorrupt
• propertyListReadStream propertyListReadStream
• propertyListReadUnknownVersion propertyListReadUnknownVersion
• propertyListWriteInvalid propertyListWriteInvalid
• propertyListWriteStream propertyListWriteStream
• redirectToNonExistentLocation redirectToNonExistentLocation
• requestBodyStreamExhausted requestBodyStreamExhausted
• resourceUnavailable resourceUnavailable
• secureConnectionFailed secureConnectionFailed
• serverCertificateHasBadDate serverCertificateHasBadDate
• serverCertificateHasUnknownRoot serverCertificateHasUnknownRoot
• serverCertificateNotYetValid serverCertificateNotYetValid
• serverCertificateUntrusted serverCertificateUntrusted
• timedOut timedOut
• unsupportedURL unsupportedURL
• userActivityConnectionUnavailable userActivityConnectionUnavailable
• userActivityHandoffFailed userActivityHandoffFailed
• userActivityHandoffUserInfoTooLarge userActivityHandoffUserInfoTooLarge
• userActivityRemoteApplicationTimedOut userActivityRemoteApplicationTimedOut
• userAuthenticationRequired userAuthenticationRequired
• userCancelledAuthentication userCancelledAuthentication