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
];
}
