NSURLErrorDomain error codes description

Question

This is my first experience of developing an ios app  I am trying to Post some data using Facebook graph api  I am constantly getting the following error   The operation couldn   t be completed   NSURLErrorDomain error 400     I cannot able to find the description of NSURLErrorDomain error codes  What does the 400 error code means

User · Answer

I received the error Domain NSURLErrorDomain Code -1011 when using Parse  and providing the wrong clientKey  As soon as I corrected that  it began working

User · Answer

IN SWIFT 3  Here are the NSURLErrorDomain error codes description in a Swift 3 enum   copied from answer above and converted what i can    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             Direct link to URLError Code in the Swift github repository  which contains the up to date list of error codes being used  github link

User · Answer

The NSURLErrorDomain error codes are listed here https   developer apple com documentation foundation 1508628-url loading system error codes  However  400 is just the http status code  http   www w3 org Protocols HTTP HTRESP html  being returned which means you ve got something wrong with your request

User · Answer

I was unable to find name of an error for given code when developing in Swift  For that reason I paste minus codes for NSURLErrorDomain taken from 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

[ios] NSURLErrorDomain error codes description

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