JSON with NSURLConnection

Header File

@property (retain, nonatomic) NSMutableData* responseData;

-(IBAction)loadData;

Implementation File

#import "ViewController.h"

#import "JSON.h"

#define kLatestKivaLoansURL @"http://api.kivaws.org/v1/loans/search.json?status=fundraising"

@implementation ViewController

@synthesize responseData;

-(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

NSDictionary* loan = [latestLoans objectAtIndex:0];

//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

  ];

}