Three20 + JSON Parsing

Question

I'm using Three20 and want to use JSON to populate my TTPhotoViewController.

If I go to a web address, let's say,

www.bbc.com/jsonoutput

I get the following

{"name":"MyName","curNiceDate":"Wed 29 Dec 10","images":["UK\/2010\/12\/29\/1.jpg","US\/2010\/12\/29\/2.jpg","EU``\/2010\/12\/29\/3.jpg","FR\/2010\/12\/29\/4.jpg","FR\/2010\/12\/29\/5.jpg","FR\/2010\/12\/29\/6.jpg","FR\/2010\/12\/29\/7.jpg","FR\/2010\/12\/29\/8.jpg","FR\/2010\/12\/29\/9.jpg"]}

I want to pick out images which are in www.bbc.com/images/.

All those directories are locations of images relevant from the above address. How would I go about pulling out this information from the JSON output and make it into a URL which will look like this

www.bbc.com/UK/2010/12/29/1.jpg

www.bbc.com/US/2010/12/29/2.jpg

www.bbc.com/EU/2010/12/29/3.jpg

www.bbc.com/FR/2010/12/29/4.jpg

So I can feed it into the TTPhotoView Picker.

Any help please?

See [this question](http://stackoverflow.com/questions/2256625/comparison-of-json-parser-for-objective-c-json-framework-yajl-touchjson-etc) for information on the various JSON libraries. I happen to be the author of [JSONKit](https://github.com/johnezang/JSONKit). — johne, Dec 30 '10 at 06:04

score 3 · Answer 1 · answered Dec 30 '10 at 05:07

I've been happy with TouchJSON, it's also very easy to use. I'm using it in conjunction with ASIHTTPRequest.

Here's a quick modification of my code to relate to your question.

- (IBAction)getImages{
    NSURL *url = [NSURL URLWithString:@"www.bbc.com/jsonoutput"];
    ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
    [request setDelegate:self];
    [request startAsynchronous];
}

- (void)requestFinished:(ASIHTTPRequest *)request{
    NSError *error;
    NSDictionary *bbcData = [[CJSONDeserializer deserializer] deserializeAsDictionary:[request responseData] error:&error];
    //TODO: do something with the error
    NSArray *images = [bbcData objectAtIndex:@"images"]; 
    NSLog(@"%@", images);   
}

- (void)requestFailed:(ASIHTTPRequest *)request{
    NSError *error = [request error];
    //TODO: do something with the error
}

Thanks for the example! It really helped as i have a better idea now! I was told that Three20 has its own JSON Parser, trying to use that parser instead of importing another one, but struggling — user370507, Dec 30 '10 at 10:45
Ah cool, good to know. I have't used the Three20 framework yet. — keegan3d, Dec 31 '10 at 02:04

score 1 · Accepted Answer · answered Dec 30 '10 at 02:24

1

https://github.com/stig/json-framework It's super easy to use. If you get stuck just look at how I used it in my code here

answered Dec 30 '10 at 02:24

Matt S.

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Thanks, I was told Three20 has its own JSON Parser, or is it better to import another one? – user370507 Dec 30 '10 at 10:44
1

https://github.com/facebook/three20/tree/master/src/extThree20JSON . Trying to use this to do the above – user370507 Dec 30 '10 at 11:09
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It uses the same framework to do it... https://github.com/facebook/three20/tree/master/src/extThree20JSON/Vendors/JSON – Matt S. Dec 31 '10 at 22:44

score 0 · Answer 3 · answered Dec 30 '10 at 06:32

0

json-framework is good use it.

answered Dec 30 '10 at 06:32

rain

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Three20 + JSON Parsing

3 Answers3