How to parse the xml file part by part ?

Question

I am developing an application. In that I am getting 500 to 600 questions via xml. But if I parse the total file at one time it takes a lot of time.

So I want to parse the xml file part by part to save the time duration.That means first I parse the xml file for first three questions and after showing those three , I can do the parsing for next three ones and so on.

But how can I stop the parsing after getting the three questions ?

If anybody knows any other approach to do the parsing fast then please tell me. Btw I am using TBXML for parsing.

show some example from your question xml – HelmiB Sep 18 '12 at 08:37 — HelmiB, Sep 18 '12 at 08:37

score 0 · Answer 1 · edited Mar 12 '13 at 23:51

0

Try this. I hope it'll help you:

-(void) loadXML:(NSString *)urlStr
{
    NSData  *data   = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:urlString]];
    parser          = [[NSXMLParser alloc] initWithData:data];
    parser.delegate = self;
    [parser parse];
}

/****
e.g.
<name>Romit</name>
**/
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
    // method to make operation when element stated. <name>
}

- (void) parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    // you get all data in this delegate method. from string variable.
    // name value
}

- (void) parser:(NSXMLParser *)parser didStartElement:(NSString *)elementname namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
   // make operation when element finished.
  //</name>
}

edited Mar 12 '13 at 23:51

answered Sep 18 '12 at 06:57

Romit M.

898
11
28

Thank you.But i know how to do the xml parsing and delegate methods for that class.I need to do the parsing a big file very fastly or do the parsing parts by parts. – Naresh Venkat Sep 18 '12 at 07:00
what do you use to display data? – Romit M. Sep 18 '12 at 07:04
I can store that data into arrays and display on Labels – Naresh Venkat Sep 18 '12 at 07:19
then i think you should use table view if your data is larger. – Romit M. Sep 18 '12 at 07:21
In which control i can display that's not a problem.I want to do the parsing very fastly or do the parsing parts by parts.So pleas etell me if you know any of these two ways.. – Naresh Venkat Sep 18 '12 at 07:27
you have use Thread, but your data is heavy then its obviously takes time. then you should display loader. – Romit M. Sep 18 '12 at 07:28
OK.U know how to do the parsing Parts by parts? – Naresh Venkat Sep 18 '12 at 07:33
yes my friend this is the only way if you want to use NSXmlParse, otherwise you can use thirdparty. but NSXmlParser is SAX parser so it better & faster. – Romit M. Sep 18 '12 at 07:39
If i take nsthread and give priority as high for that nsthread then is there any chance to get the data fast. – Naresh Venkat Sep 18 '12 at 07:42

How to parse the xml file part by part ?

1 Answers1