gistfile1.m

// Example using the ASIHTTPRequest library
// http://allseeing-i.com/ASIHTTPRequest/

- (IBAction)checkIn:(id)sender {
	NSURL* url = [NSURL URLWithString:@"https://api.fanvibe.com/v1/checkin"];  
    ASIFormDataRequest* request = [[[ASIFormDataRequest alloc] initWithURL:url] autorelease];  

    [request setDelegate:self];
 	[request setRequestMethod:@"POST"];
 	[request setPostValue:@"107763" forKey:@"game_id"];  
 	[request setPostValue:@"YOUR_ACCESS_TOKEN" forKey:@"access_token"];  
    [request setDidFailSelector:@selector(requestFailed:)];
 	[request setTimeOutSeconds:10];
 	[request startAsynchronous]; 
}

- (void)requestFinished:(ASIHTTPRequest*)request {
   NSString* responseString = [request responseString];
}

- (void)requestFailed:(ASIHTTPRequest*)request {
   NSError* error = [request error];
}