How do XML Parsing in objective C

**1)Channel.h**

    enter code here

#import 
@interface Channel : NSObject {
	
	
	NSInteger		ChannelID;
	NSString		*title;
	NSString		*urlName;
	NSString		*imgname;
	
	
	
}

@property (nonatomic, readwrite) NSInteger ChannelID;
@property (nonatomic, retain) NSString *title;
@property (nonatomic, retain) NSString *urlName;
@property (nonatomic, retain) NSString *imgname;
@end

**Channel.m**


#import "Channel.h"
#import "ParseXMLFileAppDelegate.h"

@implementation Channel

@synthesize title; 
@synthesize ChannelID; 
@synthesize urlName;
@synthesize imgname;

- (void) dealloc {
	
	[title release];
	[urlName release];
	[imgname release];
	[super dealloc];
}

@end

**2) XMLParser.h**


#import 

@class ParseXMLFileAppDelegate, Channel ;

@interface ChannelXMLParser : NSObject {

	ParseXMLFileAppDelegate	 *appDelegate;
	NSMutableString		*currentElementValue;
	Channel			*aChannel;
	
}

- (ChannelXMLParser *) initXMLParser;

@end

 *XMLParser.m*


#import "ChannelXMLParser.h"
#import "ParseXMLFileAppDelegate.h"
#import "Channel.h"


@implementation ChannelXMLParser

/*
 return object
 */

- (ChannelXMLParser *) initXMLParser {
	
	[super init];
	
	appDelegate = [ParseXMLFileAppDelegate getSharedDelegate];
	
	return self;
}


#pragma mark NSXMLParser methods
/* 
 XMLParser delegate methods
 
 */

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName 
  namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName 
	attributes:(NSDictionary *)attributeDict {
//	NSLog(@"namespace: %@",namespaceURI);
		
	if([elementName isEqualToString:@"Channels"]) {
		//Initialize the array.
		if(appDelegate.Channels == nil)
			appDelegate.Channels = [[NSMutableArray alloc] init];
		
		
	}
	else if([elementName isEqualToString:@"Channel"]) {
		
		//Initialize the Channel.
		aChannel = [[Channel alloc] init];
		
		//Extract the attribute here.
		aChannel.ChannelID = [[attributeDict objectForKey:@"id"] integerValue];
	}
	
}

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { 
		
	if(!currentElementValue) 
		currentElementValue = [[NSMutableString alloc] initWithString:string];
	else
		[currentElementValue appendString:string];
		
}

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName 
  namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
	
	
	if([elementName isEqualToString:@"Channels"])
		
		return;
	
	if([elementName isEqualToString:@"Channel"]) {
		
		[appDelegate.Channels addObject:aChannel];
		[aChannel release];
		aChannel = nil;
		NSLog(@"count : %d",[appDelegate.Channels count]);
	}
	else {
		[aChannel setValue:currentElementValue forKey:elementName];
	}
		
	[currentElementValue release];
	currentElementValue = nil;
}

- (void) dealloc {
	
	[aChannel release];
	[currentElementValue release];
	[super dealloc];
}

@end

**3) MyXMLData.h**


#import 

@class ParseXMLFileAppDelegate;
@interface MyXMLData : UIViewController<uitableviewdelegate,uitableviewdatasource> {
	
	
	UITableView				*tableView;
	ParseXMLFileAppDelegate	*appDelegate ;

}
@property(nonatomic,retain)UITableView *tableView;
-(id)initWithTabBar;
-(void)manageTableData;

@end


**MyXMLData.m**


#import "MyXMLData.h"
#import "ChannelXMLParser.h"
#import "Channel.h"
#import "ParseXMLFileAppDelegate.h"

@implementation MyXMLData
@synthesize tableView;


-(id)initWithTabBar{
	
	
	appDelegate = [ParseXMLFileAppDelegate getSharedDelegate];


	[self.navigationItem  setTitle : @"Show My XML"];
	
	
	//  Configure the Left button
	self.navigationItem.leftBarButtonItem =
	[[[UIBarButtonItem alloc] 
	  initWithTitle:@"Get XML" style:UIBarButtonItemStyleDone 
	  target:self action:@selector(xmlDataLoading)] autorelease];
	
	
	return self;
}



#pragma mark Table view methods
	
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
		
		
		return 1;
}
	
	
- (NSInteger)tableView:(UITableView *)tableView 
numberOfRowsInSection:(NSInteger)section {
	
		
	
		return [appDelegate.Channels count];
		
}
	
	
- (UITableViewCell *)tableView:(UITableView *)tableView1 
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
	
	NSLog(@" cell for row");
		
		static NSString *CellIdentifier = @"CellIdentifier";
		UITableViewCell *cell = [tableView1 dequeueReusableCellWithIdentifier:CellIdentifier];
		if(cell == nil)
		{
			cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero 
											   reuseIdentifier:CellIdentifier] autorelease];
			
		}
	
		Channel *aChannel = [appDelegate.Channels objectAtIndex:indexPath.row];
		NSString *title = aChannel.title;
		
		[cell.textLabel setText:title];
		
		return cell;
}
	



/*
 
 
 Initiate the parser here
 
 */
-(BOOL)xmlDataLoading{
	
	[appDelegate.Channels removeAllObjects];
	const NSString *kSelectedGenreFilePath =
					@"http://Enter your website for retrieve xml";
	NSString *filePathName = 
	[NSString stringWithFormat:
	 @"%@Pop.xml",kSelectedGenreFilePath];
	
	NSURL *url = nil;
	url = [[NSURL alloc] initWithString:filePathName];
	
	
	NSXMLParser *xmlParser = [[NSXMLParser alloc] 
							  initWithContentsOfURL:url];
	[url release];
	ChannelXMLParser *parser = [[ChannelXMLParser alloc] initXMLParser];
	[xmlParser setDelegate:parser];
	
	BOOL success = [xmlParser parse];
	
	
	
	[xmlParser release];
	[parser release];
	if(success){
		
		[self manageTableData]; 
		return YES;
	}
	else{
		return NO;
	}
	
	
}

-(void)manageTableData{
	
	if(self.tableView == nil){

	self.tableView = [[UITableView alloc] initWithFrame:CGRectZero];
	self.tableView.backgroundColor = [UIColor clearColor];
	
	self.tableView.delegate = self;
	self.tableView.dataSource = self;
	CGRect tableFrame = CGRectMake(0.0,0.0,320.0,480.0);
	self.tableView.frame = tableFrame;
	self.view = self.tableView;
	}
	
}


- (void)dealloc {
    [super dealloc];
}

@end

**4) ParseXMLFileAppDelegate.h**

#import 

@interface ParseXMLFileAppDelegate : NSObject <uiapplicationdelegate> {
	
	UINavigationController  *localNavigationController;
	NSMutableArray	               *Channels;
    UIWindow *window;
}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) NSMutableArray *Channels;


+(ParseXMLFileAppDelegate *) getSharedDelegate;

@end

**ParseXMLFileAppDelegate.m**

#import "ParseXMLFileAppDelegate.h"
#import "MyXMLData.h"

@implementation ParseXMLFileAppDelegate

@synthesize window,Channels;


- (void)applicationDidFinishLaunching:(UIApplication *)application { 
	
	
	MyXMLData *myXMLData;
	myXMLData = [[MyXMLData alloc] initWithTabBar];

	localNavigationController =
	[[UINavigationController alloc] initWithRootViewController:myXMLData];


	[window addSubview:localNavigationController.view];
   
    [window makeKeyAndVisible];
}

+(ParseXMLFileAppDelegate *) getSharedDelegate{
	
	return [[UIApplication sharedApplication]delegate];
}

- (void)dealloc {
    [window release];
    [super dealloc];
}

@end</uiapplicationdelegate>