iOS development uses nsxmlparser, gdataxml two ways to parse XML data

Summary: XML data parsing method has

*ios native Nsxmlparser, only supports sax parsing, easy to use

* C language LIBXML2, while supporting DOM and sax parsing

*google Gdataxml, only support DOM parsing, based on LIBXML2, need to configure the compilation environment as non-arc, and add libxml2.dylib dynamic Library

Gdataxmldocument

1 parsing XML using Gdataxml's Dom method requires importing #import "GDataXMLNode.h"

/** * Dom method parsing XML data * Pre-knowledge of XML data structure */ -(void) analysisxmlbydom{ Get URL Nsurl *url = [[Nsurl alloc] initwithstring:@ "Http://localhost:8070/MJServer/video?type=XML"]; Get an instance of session Nsurlsession *session = [Nsurlsession sharedsession]; Create a data Access task Nsurlsessiondatatask *task = [Session Datataskwithurl:url completionhandler:^ (NSData *data, Nsurlresponse *response, Nserror *error) { If an access error if (Error | | data = nil) { NSLog (@ "network busy, please try again later"); Return } Load the entire XML data Gdataxmldocument *doc = [[Gdataxmldocument alloc] Initwithdata:data options:0 Error:nil]; Gets the root element of the XML data Gdataxmlelement *root = [Doc rootelement]; Remove all video node elements under the root element Nsarray *videos = [Root elementsforname:@ "video"]; Iterating through an array to fetch data For (gdataxmlelement *element in videos) { NSLog (@ "id-%@", [element attributeforname:@ "id"].stringvalue); NSLog (@ "name-%@", [element attributeforname:@ "name"].stringvalue); NSLog (@ "url-%@", [element attributeforname:@ "url"].stringvalue); printf ("\ n----------------gorgeous split line-----------------\ n"); } }]; [Task resume]; }

2 parsing XML using Nsxmlparser's Sax method

/** * Dom method parsing XML data * Pre-knowledge of XML data structure */ -(void) analysisxmlbydom{ Get URL Nsurl *url = [[Nsurl alloc] initwithstring:@ "Http://localhost:8070/MJServer/video?type=XML"]; Get an instance of session Nsurlsession *session = [Nsurlsession sharedsession]; Create a data Access task Nsurlsessiondatatask *task = [Session Datataskwithurl:url completionhandler:^ (NSData *data, Nsurlresponse *response, Nserror *error) { If an access error if (Error | | data = nil) { NSLog (@ "network busy, please try again later"); Return } Load the entire XML data Gdataxmldocument *doc = [[Gdataxmldocument alloc] Initwithdata:data options:0 Error:nil]; Gets the root element of the XML data Gdataxmlelement *root = [Doc rootelement]; Remove all video node elements under the root element Nsarray *videos = [Root elementsforname:@ "video"]; Iterating through an array to fetch data For (gdataxmlelement *element in videos) { NSLog (@ "id-%@", [element attributeforname:@ "id"].stringvalue); NSLog (@ "name-%@", [element attributeforname:@ "name"].stringvalue); NSLog (@ "url-%@", [element attributeforname:@ "url"].stringvalue); printf ("\ n----------------gorgeous split line-----------------\ n"); } }]; [Task resume]; } /** * Sax parsing of XML data * Pre-knowledge of XML data structure */ -(void) analysisxmlbysax{ Get URL Nsurl *url = [[Nsurl alloc] initwithstring:@ "Http://localhost:8070/MJServer/video?type=XML"]; Get an instance of session Nsurlsession *session = [Nsurlsession sharedsession]; Create a data Access task Nsurlsessiondatatask *task = [Session Datataskwithurl:url completionhandler:^ (NSData *data, Nsurlresponse *response, Nserror *error) { If an access error if (Error | | data = nil) { NSLog (@ "network busy, please try again later"); Return } Creating a parser Nsxmlparser *parser = [[Nsxmlparser alloc] initwithdata:data]; Set the agent for the parser to be the current controller Parser.delegate = self; Start parsing [Parser parse]; }]; [Task resume]; } Proxy methods for #pragma mark-nsxmlparserdelegate Parsing to the beginning of the document -(void) Parserdidstartdocument: (Nsxmlparser *) parser{ NSLog (@ "parserdidstartdocument"); } Parse to element start -(void) Parser: (Nsxmlparser *) parser didstartelement: (NSString *) elementname NamespaceURI: (NSString *) NamespaceURI QualifiedName: (NSString *) QName attributes: (nsdictionary *) attributedict{ NSLog (@ "didstartelement"); Parsing to the video element if ([@ "video" Isequaltostring:elementname]) { NSLog (@ "id-%@", attributedict[@ "id"]); NSLog (@ "name-%@", attributedict[@ "name"]); NSLog (@ "url-%@", attributedict[@ "url"]); printf ("\ n----------------gorgeous split line-----------------\ n"); } } Parse to end of element -(void) Parser: (Nsxmlparser *) parser didendelement: (NSString *) elementname NamespaceURI: (NSString *) NamespaceURI QualifiedName: (NSString *) qname{ NSLog (@ "didendelement"); } Parse to end of document -(void) Parserdidenddocument: (Nsxmlparser *) parser{ NSLog (@ "parserdidenddocument"); }

iOS development uses nsxmlparser, gdataxml two ways to parse XML data