// viewController.m

- (void)viewDidLoad {
    [super viewDidLoad];

    self.pageControllerScrollView = [[YKPageControllerScrollView alloc] initWithFrame:CGRectMake(0, 100, self.view.frame.size.width, 320) containerViewController:self];
    self.pageControllerScrollView.delegate = self;
    [self.pageControllerScrollView registerClassForController:[ColorViewController class]];
    [self.view addSubview:self.pageControllerScrollView];

    [self.pageControllerScrollView reloadData];
}   

#pragma mark - YKPageControllerScrollViewDelegate
- (NSInteger)numberOfControllersInPageControllerScrollView:(YKPageControllerScrollView *)scrollView
{
    return 10;
}

- (nonnull UIViewController<YKPageControllerScrollViewLifeCycleProtocol> *)pageControllerScrollView:(nonnull YKPageControllerScrollView *)pageControllerScrollView controllerForItemAtIndex:(NSInteger)index
{
    UIViewController<YKPageControllerScrollViewLifeCycleProtocol> *vc = [pageControllerScrollView dequeueReusableViewControllerWithReuseClass:[ColorViewController class] forIndex:index];

    if (vc == nil) {
        vc = [[ColorViewController alloc] init];
    }

    return vc;
}