gistfile1.m

- (void)zipArchiveDidUnzipArchiveAtPath:(NSString*)path
                                zipInfo:(unz_global_info)zipInfo
                           unzippedPath:(NSString*)unzippedPath
{
    NSString* bundlePath = [unzippedPath stringByAppendingPathComponent:@"storyboards.bundle"];
    NSURL* url = [NSURL fileURLWithPath:bundlePath];
    NSBundle* bundle = [NSBundle bundleWithURL:url];
    
    UIStoryboard* storyboard = [UIStoryboard storyboardWithName:@"Downloadable" bundle:bundle];
    UIViewController* viewController = [storyboard instantiateInitialViewController];

    dispatch_async(dispatch_get_main_queue(), ^{
        [self presentViewController:viewController animated:YES completion:nil];
    });
}