NSString *filePath = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"json"];

NSString *jsonStr = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];

NSData* jsonData = [jsonStr dataUsingEncoding:NSUTF8StringEncoding];

NSDictionary *resultsDictionary = [jsonData objectFromJSONData];