iPhone/iOS JSON parsing tutorial

Question

As a learning experience, I want to make an iPhone application that calls a webserver/webservice, retrieves a JSON response, and uses that response to populate the rows of a UITableView (assuming it converts the JSON into an NSArray first).

Anyone know of anything that might be useful?

score 164 · Accepted Answer · edited Jan 09 '12 at 08:47

164

You will love this framework.

And you will love this tool.

For learning about JSON you might like this resource.

And you'll probably love this tutorial.

edited Jan 09 '12 at 08:47

unicorn_crack

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answered Apr 28 '11 at 03:19

Todd Hopkinson

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You're absolutely right about me loving that too @icnivad, thanks a lot for the lead this is very useful. – Casey Flynn Apr 28 '11 at 03:51
. Tutorial you mentioned requires DMG file but I could not find any DMG file on Link you mentioned for framework. that link directs on github and contains a zip file with various classes and examples but I dont understand which part I need to insert in my project. Can you please help me? – alekhine Nov 04 '11 at 09:35
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Yeah, that project moved to github. Get it here: https://github.com/stig/json-framework/. – Todd Hopkinson Nov 04 '11 at 19:54
You'll also probably love hurl.it – Caspar Harmer Mar 26 '12 at 07:49
That SBJson thing would be nice if it built. Fails for me with 44 errors in Xcode 4 in OS X Lion. – Sarah Vessels Jul 20 '12 at 17:04
I do love this answer. And I did love the way it was written. I will definitely love to vote it up now. ;) – driechel Apr 30 '13 at 10:56

score 57 · Answer 2 · answered Mar 29 '12 at 19:08

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As of iOS 5.0 Apple provides the NSJSONSerialization class "to convert JSON to Foundation objects and convert Foundation objects to JSON". No external frameworks to incorporate and according to benchmarks its performance is quite good, significantly better than SBJSON.

answered Mar 29 '12 at 19:08

darrinm

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This words great as long as one is not planning to support iOS 4 and earlier versions. – Sanjay Chaudhry Jun 07 '12 at 20:55
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Since It's now 2012 and iOS6 is imminent - that's more likely to be the case. – Abizern Jul 24 '12 at 09:26
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And the benchmark result is "404 Not Found". – Pang Dec 22 '13 at 06:08
Some updated benchmarks, showing NSJSONSerialization as the fastest: http://stackoverflow.com/questions/16218583/jsonkit-benchmarks – darrinm Dec 22 '13 at 19:18

chandrika · Answer 3 · 2014-02-04T06:29:54.133

SBJSON *parser = [[SBJSON alloc] init];

NSString *url_str=[NSString stringWithFormat:@"Example APi Here"];

url_str = [url_str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

NSURLRequest *request =[NSURLRequest requestWithURL:[NSURL URLWithString:url_str]];

NSData *response = [NSURLConnection sendSynchronousRequest:request  returningResponse:nil error:nil];

NSString *json_string = [[NSString alloc] initWithData:response1 encoding:NSUTF8StringEncoding]

NSDictionary *statuses = [parser2 objectWithString:json_string error:nil];

 NSArray *news_array=[[statuses3 objectForKey:@"sold_list"] valueForKey:@"list"];

    for(NSDictionary *news in news_array)
{

    @try {
        [title_arr addObject:[news valueForKey:@"gtitle"]];    //values Add to title array

    }
    @catch (NSException *exception) {

        [title_arr addObject:[NSString stringWithFormat:@""]];
    }

Thanks for providing a code sample! – Flea Aug 16 '13 at 18:13 — Flea, Aug 16 '13 at 18:13

score 4 · Answer 4 · edited Feb 06 '13 at 11:16

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This is the tutorial I used to get to darrinm's answer. It's updated for ios5/6 and really easy. When I'm popular enough I'll delete this and add it as a comment to his answer.

http://www.raywenderlich.com/5492/working-with-json-in-ios-5

http://www.touch-code-magazine.com/tutorial-fetch-and-parse-json-in-ios6/

edited Feb 06 '13 at 11:16

Avisek Chakraborty

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answered Oct 27 '12 at 16:11

cloudsurfin

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score 4 · Answer 5 · answered Jan 09 '12 at 08:51

4

try out with this fastest JSON framework JSONKit. it's faster than normal JSON framework.

answered Jan 09 '12 at 08:51

Hiren

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You're right, this is lightning fast! – Ivan Fioravanti Jan 14 '12 at 02:43
The best JSON framework +1 – Jul 31 '13 at 09:52

score 1 · Answer 6 · answered Apr 03 '13 at 14:26

Here's a link to my tutorial, which walks you through :

creating a JSON WCF Web Service from scratch (and the problems you'll want to avoid)
adapting it to read/write SQL Server data
getting an iOS 6 app to use the JSON servies.
using the JSON web services with JavaScript

http://mikesknowledgebase.com/pages/Services/WebServices-Page1.htm

All source code is provided, free of charge. Enjoy.

iPhone/iOS JSON parsing tutorial

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