IOS XML Parsing Learning

XML file:

<?xml version= "1.0" encoding= "UTF-8"? ><notes><note id= "1" ><CDate>2013-6-11</CDate> <content>ksdjfaljdfasf</content><userid>alex</userid></note><note id= "2" > <cdate>2012-6-11</cdate><content>vvvvvvvvvvv</content><userid>alex11</userid ></Note></Notes>

//

NotesXMLParser.h

Xml

//

Created by Alex on 13-6-12.

Copyright (c) year Alex. All rights reserved.

//

#import <Foundation/Foundation.h>

@interface Notesxmlparser: NSObject<nsxmlparserdelegate>

@property (nonatomic,strong) nsmutablearray *notes;

@property (nonatomic, strong) nsstring *currenttagname;

-(void) start;

@end

//

Notesxmlparser.m

Xml

//

Created by Alex on 13-6-12.

Copyright (c) year Alex. All rights reserved.

//

#import "NotesXMLParser.h"

@implementation Notesxmlparser

-(void) Start

{

nsstring* Path = [[nsbundle mainbundle] pathforresource: /c6>@ "notes" ofType:@ "xml"];

nsurl *url = [nsurl fileurlwithpath:p Ath];

// start parsing XML

nsxmlparser *parser = [[nsxmlparser alloc] initwithcontentsofurl: url];

Parser. delegate = self;

[Parser parse];

NSLog(@ " parse complete ...");

}

// triggers when the document starts

-(void) Parserdidstartdocument: (nsxmlparser *) parser

{

_notes = [nsmutablearray new];

}

// document is triggered when error occurs

-(void) parser: (nsxmlparser *) Parser parseerroroccurred: (nserror *) parseerror

{

NSLog (@ "%@", parseerror);

}

// trigger when a start tag is encountered

-(void) parser: (nsxmlparser *) Parser didstartelement: (nsstring *) elementname

NamespaceURI: (nsstring *) NamespaceURI

QualifiedName: (nsstring *) qualifiedname

Attributes: (nsdictionary *) attributedict

{

_currenttagname = elementname;

if ([_currenttagname isequaltostring:@ "Note" ]) {

nsstring *_id = [attributedict objectforkey:@ "id"];

nsmutabledictionary *dict = [nsmutabledictionary new];

[Dict setobject: _id forkey:@ "id"];

[_notes addobject:d ICT];

}

}

// trigger when string is encountered

-(void) parser: (nsxmlparser *) Parser foundcharacters: (nsstring *) string

{

string =[string stringbytrimmingcharactersinset: [nscharacterset  Whitespaceandnewlinecharacterset]]; // replace carriage return and spaces

if ([String isequaltostring:@ "]) {

Return

}

nsmutabledictionary *dict = [_notes lastobject];

if ([_currenttagname isequaltostring:@ "CDate"] && dict) {

[Dict setobject: String forkey:@ "CDate"];

}

if ([_currenttagname isequaltostring:@ "Content"] && dict) {

[Dict setobject: String forkey:@ "Content"];

}

if ([_currenttagname isequaltostring:@ "UserID"] && dict) {

[Dict setobject: String forkey:@ "UserID"];

}

}

// start when the end tag is encountered

-(void) parser: (nsxmlparser *) Parser didendelement: (nsstring *) elementname

NamespaceURI: (nsstring *) NamespaceURI

QualifiedName: (nsstring *) qName;

{

self. Currenttagname = nil;

}

// trigger at end of document

-(void) Parserdidenddocument: (nsxmlparser *) parser

{

[[nsnotificationcenter defaultcenter] postnotificationname: @ "Reloadviewnotification" Object:self. Notes userInfo:nil];

Self. notes = nil;

}

@end

#import "ViewController.h"

#import "NotesXMLParser.h"

@interface viewcontroller ()

@end

@implementation Viewcontroller

-(void) viewdidload

{

[super viewdidload];

[[nsnotificationcenter defaultcenter] addobserver: Self selector:@selector(reloadview:) Name:@ "reloadviewnotification" object:nil];

notesxmlparser *parser=[notesxmlparser new];

[Parser start];

}

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