在苹果文档中检查这些错误代码
http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSXMLParser_Class/Reference/Reference.html
enum {
NSXMLParserInternalError = 1,
NSXMLParserOutOfMemoryError = 2,
NSXMLParserDocumentStartError = 3,
NSXMLParserEmptyDocumentError = 4,
NSXMLParserPrematureDocumentEndError = 5,
NSXMLParserInvalidHexCharacterRefError = 6,
NSXMLParserInvalidDecimalCharacterRefError = 7,
NSXMLParserInvalidCharacterRefError = 8,
NSXMLParserInvalidCharacterError = 9,
NSXMLParserCharacterRefAtEOFError = 10,
NSXMLParserCharacterRefInPrologError = 11,
NSXMLParserCharacterRefInEpilogError = 12,
NSXMLParserCharacterRefInDTDError = 13,
NSXMLParserEntityRefAtEOFError = 14,
NSXMLParserEntityRefInPrologError = 15,
NSXMLParserEntityRefInEpilogError = 16,
NSXMLParserEntityRefInDTDError = 17,
NSXMLParserParsedEntityRefAtEOFError = 18,
NSXMLParserParsedEntityRefInPrologError = 19,
NSXMLParserParsedEntityRefInEpilogError = 20,
NSXMLParserParsedEntityRefInInternalSubsetError = 21,
NSXMLParserEntityReferenceWithoutNameError = 22,
NSXMLParserEntityReferenceMissingSemiError = 23,
NSXMLParserParsedEntityRefNoNameError = 24,
NSXMLParserParsedEntityRefMissingSemiError = 25,
NSXMLParserUndeclaredEntityError = 26,
NSXMLParserUnparsedEntityError = 28,
NSXMLParserEntityIsExternalError = 29,
NSXMLParserEntityIsParameterError = 30,
NSXMLParserUnknownEncodingError = 31,
NSXMLParserEncodingNotSupportedError = 32,
NSXMLParserStringNotStartedError = 33,
NSXMLParserStringNotClosedError = 34,
NSXMLParserNamespaceDeclarationError = 35,
NSXMLParserEntityNotStartedError = 36,
NSXMLParserEntityNotFinishedError = 37,
NSXMLParserLessThanSymbolInAttributeError = 38,
NSXMLParserAttributeNotStartedError = 39,
NSXMLParserAttributeNotFinishedError = 40,
NSXMLParserAttributeHasNoValueError = 41,
NSXMLParserAttributeRedefinedError = 42,
NSXMLParserLiteralNotStartedError = 43,
NSXMLParserLiteralNotFinishedError = 44,
NSXMLParserCommentNotFinishedError = 45,
NSXMLParserProcessingInstructionNotStartedError = 46,
NSXMLParserProcessingInstructionNotFinishedError = 47,
NSXMLParserNotationNotStartedError = 48,
NSXMLParserNotationNotFinishedError = 49,
NSXMLParserAttributeListNotStartedError = 50,
NSXMLParserAttributeListNotFinishedError = 51,
NSXMLParserMixedContentDeclNotStartedError = 52,
NSXMLParserMixedContentDeclNotFinishedError = 53,
NSXMLParserElementContentDeclNotStartedError = 54,
NSXMLParserElementContentDeclNotFinishedError = 55,
NSXMLParserXMLDeclNotStartedError = 56,
NSXMLParserXMLDeclNotFinishedError = 57,
NSXMLParserConditionalSectionNotStartedError = 58,
NSXMLParserConditionalSectionNotFinishedError = 59,
NSXMLParserExternalSubsetNotFinishedError = 60,
NSXMLParserDOCTYPEDeclNotFinishedError = 61,
NSXMLParserMisplacedCDATAEndStringError = 62,
NSXMLParserCDATANotFinishedError = 63,
NSXMLParserMisplacedXMLDeclarationError = 64,
NSXMLParserSpaceRequiredError = 65,
NSXMLParserSeparatorRequiredError = 66,
NSXMLParserNMTOKENRequiredError = 67,
NSXMLParserNAMERequiredError = 68,
NSXMLParserPCDATARequiredError = 69,
NSXMLParserURIRequiredError = 70,
NSXMLParserPublicIdentifierRequiredError = 71,
NSXMLParserLTRequiredError = 72,
NSXMLParserGTRequiredError = 73,
NSXMLParserLTSlashRequiredError = 74,
NSXMLParserEqualExpectedError = 75,
NSXMLParserTagNameMismatchError = 76,
NSXMLParserUnfinishedTagError = 77,
NSXMLParserStandaloneValueError = 78,
NSXMLParserInvalidEncodingNameError = 79,
NSXMLParserCommentContainsDoubleHyphenError = 80,
NSXMLParserInvalidEncodingError = 81,
NSXMLParserExternalStandaloneEntityError = 82,
NSXMLParserInvalidConditionalSectionError = 83,
NSXMLParserEntityValueRequiredError = 84,
NSXMLParserNotWellBalancedError = 85,
NSXMLParserExtraContentError = 86,
NSXMLParserInvalidCharacterInEntityError = 87,
NSXMLParserParsedEntityRefInInternalError = 88,
NSXMLParserEntityRefLoopError = 89,
NSXMLParserEntityBoundaryError = 90,
NSXMLParserInvalidURIError = 91,
NSXMLParserURIFragmentError = 92,
NSXMLParserNoDTDError = 94,
NSXMLParserDelegateAbortedParseError = 512
};
typedef NSInteger NSXMLParserError;```