message: Rendered page view controller
diff: #import "NVTabBarPagerView.h"
  @implementation NVTabBarPagerView
  +{
  + UIPageViewController *_pageViewController;
  + NSArray<UIViewController *> *_tabs;
  +}
  +
  +- (id)init
  +{
  + if (self = [super init]) {
  + _pageViewController = [[UIPageViewController alloc] init];
  + [self addSubview:_pageViewController.view];
  + _tabs = [[NSMutableArray alloc] init];
  + }
  + return self;
  +}
  +
  @end
  