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所有错误代码均在文档的“ CFNetwork错误代码参考”中(链接)一小部分提取CFURL和CFURLConnection错误: kCFURLErrorUnknown = -998, kCFURLErrorCancelled = -999, kCFURLErrorBadURL = -1000, kCFURLErrorTimedOut = -1001, kCFURLErrorUnsupportedURL = -1002, kCFURLErrorCannotFindHost = -1003, kCFURLErrorCannotConnectToHost = -1004, kCFURLErrorNetworkConnectionLost = -1005, kCFURLErrorDNSLookupFailed = -1006, kCFURLErrorHTTPTooManyRedirects = -1007, kCFURLErrorResourceUnavailable = -1008, kCFURLErrorNotConnectedToInternet = -1009, kCFURLErrorRedirectToNonExistentLocation = -1010, kCFURLErrorBadServerResponse = -1011, kCFURLErrorUserCancelledAuthentication = -1012, kCFURLErrorUserAuthenticationRequired = -1013, kCFURLErrorZeroByteResource = -1014, kCFURLErrorCannotDecodeRawData = -1015, kCFURLErrorCannotDecodeContentData = -1016, kCFURLErrorCannotParseResponse = -1017, kCFURLErrorInternationalRoamingOff = -1018, kCFURLErrorCallIsActive = -1019, kCFURLErrorDataNotAllowed = -1020, kCFURLErrorRequestBodyStreamExhausted = -1021, kCFURLErrorFileDoesNotExist = -1100, kCFURLErrorFileIsDirectory = -1101, kCFURLErrorNoPermissionsToReadFile = -1102, kCFURLErrorDataLengthExceedsMaximum = -1103,
小怪兽爱吃肉
参见NSURLError.h定义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 errorsNSURLErrorSecureConnectionFailed = -1200,NSURLErrorServerCertificateHasBadDate = -1201,NSURLErrorServerCertificateUntrusted = -1202,NSURLErrorServerCertificateHasUnknownRoot = -1203,NSURLErrorServerCertificateNotYetValid = -1204,NSURLErrorClientCertificateRejected = -1205,NSURLErrorClientCertificateRequired = -1206,NSURLErrorCannotLoadFromNetwork = -2000,// Download and file I/O errorsNSURLErrorCannotCreateFile = -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,