cocos2d json parsing for iphone application - xcode

Question

Is there any good tutorial/source code to parse jSon data into the cocos2d project? I know how to parse jSon (also the XML) into the xcode and display into the tableview but I need to do that for my cocos2d project.
Here is what I was trying to do:
#import "Eighties.h"
#import "HelloWorldLayer.h"
#import "GameScene.h"
#import "JSON.h"
#define kLatestKivaLoansURL #"http://api.kivaws.org/v1/loans/search.json?status=fundraising"
#implementation Eighties
#synthesize responseData;
+(CCScene *) scene
{
// 'scene' is an autorelease object.
CCScene *scene = [CCScene node];
// 'layer' is an autorelease object.
Eighties *layer = [Eighties node];
// add layer as a child to scene
[scene addChild: layer];
// return the scene
return scene;
}
-(id) init
{
// always call "super" init
// Apple recommends to re-assign "self" with the "super's" return value
if( (self=[super init]) ) {
CGSize winSize = [[CCDirector sharedDirector] winSize];
CCSprite *bg = [CCSprite spriteWithFile:#"bg.jpg"];
[bg setPosition:ccp(winSize.width/2, winSize.height/2)];
[self addChild:bg z:0];
/*
CCMenuItem *menuItems = [CCMenuItemImage itemWithNormalImage:#"back_pink.png" selectedImage:#"back_blue.png" block:^(id sender) {
NSLog(#"Pressed");
[[SimpleAudioEngine sharedEngine] playEffect:#"tongue-clap.wav"];
[[CCDirector sharedDirector] replaceScene:[CCTransitionFade transitionWithDuration:1.0 scene:[GameScene scene] withColor:ccWHITE]];
}];
*/
CCMenuItem *menuItems2 = [CCMenuItemImage itemWithNormalImage:#"back_pink.png" selectedImage:#"back_blue.png" target:self selector:#selector(loadData)];
menuItems2.position = ccp(winSize.width/2-50, winSize.height/2-50);
CCMenu *menu = [CCMenu menuWithItems:menuItems2, nil];
menu.position = ccp(winSize.width/2, winSize.height/2);
[self addChild:menu];
}
return self;
}
-(void)test {
NSLog(#"Success");
UIAlertView *message = [[UIAlertView alloc] initWithTitle:#"Success"
message:#"Test Method Called"
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[message show];
}
-(void)loadData
{
self.responseData = [NSMutableData data];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:kLatestKivaLoansURL]];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[responseData setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[responseData appendData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
[connection release];
self.responseData = nil;
}
#pragma mark -
#pragma mark Process loan data
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
[connection release];
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
self.responseData = nil;
NSArray* latestLoans = [(NSDictionary*)[responseString JSONValue] objectForKey:#"loans"];
[responseString release];
//choose a random loan
for (int i=0; i<=18; i++) {
NSDictionary* loan = [latestLoans objectAtIndex:i];
//fetch the data
NSNumber* fundedAmount = [loan objectForKey:#"funded_amount"];
NSNumber* loanAmount = [loan objectForKey:#"loan_amount"];
//float outstandingAmount = [loanAmount floatValue] - [fundedAmount floatValue];
//NSString* name = [loan objectForKey:#"name"];
//NSString* country = [(NSDictionary*)[loan objectForKey:#"location"] objectForKey:#"country"];
//set the text to the label
/*
label.text = [NSString stringWithFormat:#"Latest loan: %# from %# needs another $%.2f, please help",
name,country,outstandingAmount
];
*/
NSLog(#"%d",i);
//NSLog(#"%#",label.text);
NSLog(#"\n");
/*
UIAlertView *message = [[UIAlertView alloc] initWithTitle:name
message:country
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[message show];
*/
}
}
#end

Answer 1

There are a lot of ways to deserialize JSON objects, some ways are even baked into the SDK.
This question details a few ways you can approach the problem.

Answer 2

or you can take your JSON and have this utility generate the parsing code for you
https://itunes.apple.com/us/app/json-accelerator/id511324989?mt=12