how read all the child elements of xml using Xcode? - iphone

Question

I need to read all child nodes dynamically from node 'book' with id 1 (if you add a child node in xml file but not have to change anything in the code) and put the values ​​of the child nodes into a tableView.
As I can I do?
<Book id="1">
<name>Vishal</name>
<address>Mumbai</address>
<country>India</country>
<editorial>Trillas</editorial>
<edicion>Segunda</edicion>
</Book>
<Book id="2">
<name>Vinod</name>
<address>Delhi</address>
<autor>Julianne MacLean</autor>
</Book>
<Book id="3">
<name>Sachin</name>
<address>pune</address>
<country>India</country>
<editorial>Porrua</editorial>
</Book>
<Book id="4">
<name>Nilesh</name>
<address>Nasik</address>
<country>India</country>
</Book>
<Book id="5">
<name>Video</name>
<address>Nasik</address>
<country>India</country>
</Book>

Answer 1

You Can yoe XMLReader (parser)
XMLReader.h
#import <Foundation/Foundation.h>
#interface XMLReader : NSObject<NSXMLParserDelegate>
{
NSMutableArray *dictionaryStack;
NSMutableString *textInProgress;
NSError __strong **_errorPointer;
}
+ (id)parseXML:(NSString *)file_name;
+ (NSDictionary *)dictionaryForXMLData:(NSData *)data error:(NSError **)errorPointer;
+ (NSDictionary *)dictionaryForXMLString:(NSString *)string error:(NSError **)errorPointer;
#end
XMLReader.m
#import "XMLReader.h"
NSString *const kXMLReaderTextNodeKey = #"element_text";
#interface XMLReader (Internal)
- (id)initWithError:(NSError **)error;
- (NSDictionary *)objectWithData:(NSData *)data;
#end
#implementation XMLReader
#pragma mark -
#pragma mark Public methods
+ (NSDictionary *)dictionaryForXMLData:(NSData *)data error:(NSError **)error
{
XMLReader *reader = [[XMLReader alloc] initWithError:error];
NSDictionary *rootDictionary = [reader objectWithData:data];
[reader release];
return rootDictionary;
}
+ (NSDictionary *)dictionaryForXMLString:(NSString *)string error:(NSError **)error
{
NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
return [XMLReader dictionaryForXMLData:data error:error];
}
#pragma mark -
#pragma mark Parsing
- (id)initWithError:(NSError **)error
{
if (self = [super init])
{
_errorPointer = error;
}
return self;
}
- (void)dealloc
{
[dictionaryStack release];
[textInProgress release];
[super dealloc];
}
- (NSDictionary *)objectWithData:(NSData *)data
{
// Clear out any old data
[dictionaryStack release];
[textInProgress release];
dictionaryStack = [[NSMutableArray alloc] init];
textInProgress = [[NSMutableString alloc] init];
// Initialize the stack with a fresh dictionary
[dictionaryStack addObject:[NSMutableDictionary dictionary]];
// Parse the XML
NSXMLParser *parser = [[NSXMLParser alloc] initWithData:data];
parser.delegate = self;
BOOL success = [parser parse];
// Return the stack's root dictionary on success
if (success)
{
NSDictionary *resultDict = [dictionaryStack objectAtIndex:0];
return resultDict;
}
return nil;
}
#pragma mark -
#pragma mark NSXMLParserDelegate methods
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
// Get the dictionary for the current level in the stack
NSMutableDictionary *parentDict = [dictionaryStack lastObject];
// Create the child dictionary for the new element, and initilaize it with the attributes
NSMutableDictionary *childDict = [NSMutableDictionary dictionary];
[childDict addEntriesFromDictionary:attributeDict];
// If there's already an item for this key, it means we need to create an array
id existingValue = [parentDict objectForKey:elementName];
if (existingValue)
{
NSMutableArray *array = nil;
if ([existingValue isKindOfClass:[NSMutableArray class]])
{
// The array exists, so use it
array = (NSMutableArray *) existingValue;
}
else
{
// Create an array if it doesn't exist
array = [NSMutableArray array];
[array addObject:existingValue];
// Replace the child dictionary with an array of children dictionaries
[parentDict setObject:array forKey:elementName];
}
// Add the new child dictionary to the array
[array addObject:childDict];
}
else
{
// No existing value, so update the dictionary
[parentDict setObject:childDict forKey:elementName];
}
// Update the stack
[dictionaryStack addObject:childDict];
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
// Update the parent dict with text info
NSMutableDictionary *dictInProgress = [dictionaryStack lastObject];
// Set the text property
if ([textInProgress length] > 0)
{
[dictInProgress setObject:textInProgress forKey:kXMLReaderTextNodeKey];
// Reset the text
[textInProgress release];
textInProgress = [[NSMutableString alloc] init];
}
// Pop the current dict
[dictionaryStack removeLastObject];
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
string = [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
// Build the text value
[textInProgress appendString:string];
}
+ (id)parseXML:(NSString *)file_name{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *documentFolderPath = [paths objectAtIndex: 0];
NSString *filePath = [documentFolderPath stringByAppendingPathComponent:appDelegate.path];
if ([file_name isEqualToString:#"yourXMLfilename.xml"])
filePath = [filePath stringByDeletingLastPathComponent];
filePath = [filePath stringByAppendingPathComponent:file_name];
NSString* theContents = [[NSString alloc] initWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
NSDictionary* dict = [self dictionaryForXMLString:theContents error:nil];
//This dictionary contains your tags of one record.
// you can get yor tag value by
NSString *val = #"";
if ([[dict allKeys] containsObject:#"name"]) {
val = [dict objectForKey:#"name"];
}
}
#end