- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    CGFloat width = self.view.bounds.size.width;
    RTPagedCollectionViewLayout *layout = [[RTPagedCollectionViewLayout alloc] init];
    layout.columns = 3;
    layout.rows = 2;
    layout.itemSize = CGSizeMake(30, 30);
    UICollectionView *collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 0, width, 240)
                                                          collectionViewLayout:layout];
    [self.view addSubview:collectionView];
}