まじで断片ですまぬ

hoge.m

    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
    AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
        if (self.item_page == 1 && !JSON) {
            [UIUtilitiy hideActivityIndicator];
            [UIUtilitiy showAlert:@"error" text:@"見つかりませんでした"];
            return;
        }
        if (JSON) {
            [self.items addObjectsFromArray:[[[NSMutableArray alloc]initWithArray:JSON]autorelease]];
            self.not_found = NO;
        } else {
            self.not_found = YES;
        }
        [self.tableView reloadData]; 
        [UIUtilitiy hideActivityIndicator];
    } failure:nil];
    [operation start];