How can I parse the response xml string?

Question

<?xml version="1.0" encoding="utf-8"?>
  <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" 
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
                 xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <soap:Body>
      <VideoListResponse xmlns="http://tempuri.org/">
        <VideoListResult>
          {"List":[{"GUID":"127381638172638173","PageNumber":[2,1]}]}
        </VideoListResult>
      </VideoListResponse>
    </soap:Body>
  </soap:Envelope>

This is my response xml string. How can I parse the PageNumber from this xml string?

Srikanth · Accepted Answer · 2013-01-07 18:25:18Z

This is a simple code fragment which you can use to expand

ViewController.h file

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <NSXMLParserDelegate>

@property(retain,nonatomic)NSString *videoListResult;

@property(retain,nonatomic)NSString *currentElement;

@end

ViewController.m file

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(void)viewDidAppear:(BOOL)animated{
    [self parseXML];
}

-(void)parseXML{
    NSString *xmlString = @"<?xml version=\"1.0\" encoding=\"utf-8\"?>\
    <soap:Envelope xmlns:soap=\"http://www.w3.org/2003/05/soap-envelope\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">\
    <soap:Body>\
    <VideoListResponse xmlns=\"http://tempuri.org/\">\
    <VideoListResult>{\"List\":[{\"GUID\":\"127381638172638173\",\"PageNumber\":[2,1]}]}\
    </VideoListResult>\
    </VideoListResponse>\
    </soap:Body>\
    </soap:Envelope>";

    NSData *xmlData = [xmlString dataUsingEncoding:NSASCIIStringEncoding];

    NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithData:xmlData];

    [xmlParser setDelegate:self];

    [xmlParser parse];

}

-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{

    NSLog(@"Element started %@",elementName);
    self.currentElement=elementName;

}

-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{

    NSLog(@"Element ended %@",elementName);
    self.currentElement=@"";

}

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
    if([self.currentElement isEqualToString:@"VideoListResult"]){
       // NSLog(@"The characters are %@",string);

        id data = [NSJSONSerialization JSONObjectWithData:[string dataUsingEncoding:NSASCIIStringEncoding] options:0 error:nil];


        NSLog(@"The page numbers are %@",[[[data valueForKey:@"List"] objectAtIndex:0] valueForKey:@"PageNumber"]);


    }
}

@end

Hi, im trying to use your code and Im trying this but I get an Expected Expression error at the string xlmns line: -(void)parseXML{ NSString *xmlString = @"<?xml version=\"1.0\" encoding=\"utf-8\"?>\ <string xmlns=\"http://server.com">\; NSData *xmlData = [xmlString dataUsingEncoding:NSASCIIStringEncoding]; NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithData:xmlData]; [xmlParser setDelegate:self]; [xmlParser parse]; }

jfaller · Accepted Answer · 2013-01-07 18:05:54Z

1

You want to use LibXML to parse the XML, and then you want to use SBJSON to parse the JSON contained in the VideoListResult.

answered Jan 7, 2013 at 18:05

jfaller

5083 silver badges7 bronze badges

2 Comments

Richard Over a year ago

There's also NSXMLParser, NSXMLParserDelegate, & NSJSONSerialization. I would definitely prefer built-in classes to third-party libraries.

jfaller Over a year ago

Unless you need to support iOS 4.X, Richard is mostly right. libXML is slightly better for XML parsing (in that you can just parse on the XPath, and grab the field you want), whereas if you use NSXMLParser, you have to mess around more of the document.

Collectives™ on Stack Overflow

How can I parse the response xml string?

2 Answers 2

1 Comment

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related