what are the basic things shall i read to understand how parsing xml in Objective-C works
HI,
These links may help for you,
IPhone XML Parsing
XML parsing
go through these tutorials
http://www.w3schools.com/xml/default.asp
This tutorial for Internet data transferring and receiving
http://www.json.org/
and NSXMLParser class reference
http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSXMLParser_Class/Reference/Reference.html
Hope this helps
Xml Parsing
Related
I am going to make an application and in that I want to store user's input in XML file and then parse it to another user,So I am confuse How can I do it, and which XML method should I use? NSXML parser,libxml,touchXML or KissXML?
I think this link will help you to choose best type of xml parser.
How To Choose The Best XML Parser for Your iPhone Project
Thank You
I just implemented my first XmlParser object (MyParserObj) that relies on the NSXMLParser object.
This parser is embedded inside a tableviewController (MyTableViewController) and it starts parsing at MyTableViewController's viewDidLoad method.
Ok.This is working just fine.It's a small Xml file though! I was wondering if I should choose a different approach when dealing with big Xml files? Will memory suffer when parsing large xml documents?
UPDATE
The real point I want to understand is the flow of the process:
I placed few breakpoints now and it looks like this:
the app first encounters ( inside MyTableViewController's viewDidLoad method )the [MyParserObj parseXMLFileAtURL:path] and starts parsing the Xml document;
The app finishes parsing the whole Xml Document (parserDidEndDocument..);
The tableviewController starts populating its tableView Cells (cellForRowAtIndexPath..);
Apart from choosing a XmlParser (Between those you suggested) that is more or less time/memory consuming are the above steps going to be the same?
If positive, is it correct to think of starting populating the cells as soon as The Parser is done with that specific element?How do I do that?
thanks
Luca
Jim Dovey create a nice blog post about parsing big XML files.
http://blog.alanquatermain.me/2009/04/06/aqxmlparser-equals-equals-big-memory-win/ here Jim describes his one XML parser wich user les memory then other parser.
So if you need to parse large XML files I would suggest you have a look het the open source XML parser AQXMLParser which is the parser create in the blog post.
On iPhone devices, you don't have the NSXMLDocument available on MAC which reads the whole XML document into memory. There are many XML Parser classes available, and you can find them in the link below.
http://www.raywenderlich.com/553/how-to-chose-the-best-xml-parser-for-your-iphone-project
This tutorial on Ray Wenderlich is what u need to read to know which xml reader is best for your app.
For my own applications, I use SMXMLDocument, you can read about it here:
http://nfarina.com/post/2843708636/a-lightweight-xml-parser-for-ios
for big data, i suggest u json instead of xml, see here a tutorial
http://www.readwriteweb.com/hack/2010/11/json-vs-xml.php
I want to create XML string to be sent to server through web-service. How do I do it natively in iPhone? Or do I have to use any third party library?
I was not able to download GDATA for iPhone. Any else available? Or any other way to do it?
Please help,
Thanks in advance.
You can create XML file with StringWithFormat method or Some of XML parser allow write XML as well. Please refer link of Parser for writing XML
http://www.raywenderlich.com/553/how-to-chose-the-best-xml-parser-for-your-iphone-project
You can use JSON parser also....
You may want to refer to SBJSON Framework which is frequently used for objective-C, I have used this framework in may of my iOS Apps.
You may get a reference about it from these links:
https://github.com/stig/json-framework
http://stig.github.com/json-framework/
Example Code: Also here is an example on, How to parse JSON with SBJSON Parser:
How to parse JSON into Objective C - SBJSON
http://jasarien.com/?p=428
Am writing one small application to parse from XML to JSON object for iphone. can anyone tell me the availability of open source library present to do the parsing usnig objective-c.
There are plenty of open source solutions in objective-c to deal with JSON :
JSONKit : https://github.com/johnezang/JSONKit
SBJson (aka json-framework) : https://github.com/stig/json-framework
YAJL Framework : https://github.com/gabriel/yajl-objc
To deal with xml, you can use the default NSXMLParser class or some other solutions like some code I've posted here (DOM parser) :
NSXMLParser retrieving wrong data from XML tags
You can also check this page which will give you a good overview of available solutions for XML parsing (and an explaination of differences between SAX and DOM parsers) : http://www.raywenderlich.com/553/how-to-chose-the-best-xml-parser-for-your-iphone-project
Well there is a json parser available for objective c on github. Its very simple to use. You may have to write some additional code to provide input to the parser.
I use NSPropertyListSerialization from Apple to turn a Plist XML into a dictionary. Then we just need to find something to go from dictionary to JSON.
The json-framework looks like a nice JSON generator.
I just want a tutorial demonstrating the parsing of XML File using libXml2 in Iphone . I found tutorials on TouchXMLand other but not the same for Libxml2
Please help if u can.
Apple has an example iPhone project that parses some simple XML using both NSXMLParser and libxml2 SAX2. You can find the project here:
http://developer.apple.com/iphone/library/samplecode/XMLPerformance/Introduction/Intro.html
Although this isn't exactly a tutorial, it is working code. It runs in the simulator out of the box. Because it accomplishes the same task twice, you should be able to compare the libxml2 code to the NSXMLParser code to figure out what's going on.
Not even these?
I recommend TBXML. I use it everytime I need to parse a XML File. It's really easy to use. ;-)
See here: TBXML Homepage
A good sample is:
http://bill.dudney.net/roller/objc/entry/libxml2_push_parsing