?- (void)push
? ? {
? ? ? ? TestViewController *vc = [[TestViewController alloc] init];
? ? ? ? vc.view.backgroundColor = [UIColor redColor];
? ? ? ? CATransition* transition = [CATransition animation];
? ? ? ? transition.duration =0.4f;
? ? ? ? transition.type = kCATransitionMoveIn;
? ? ? ? transition.subtype = kCATransitionFromTop;
? ? ? ? [self.navigationController.view.layer addAnimation:transition forKey:kCATransition];
? ? ? ? [self.navigationController pushViewController:vc animated:NO];
? ? }
? ? - (void)pop
? ? {
? ? ? ? CATransition* transition = [CATransition animation];
? ? ? ? transition.duration =0.4f;
? ? ? ? transition.type = kCATransitionReveal;
? ? ? ? transition.subtype = kCATransitionFromBottom;
? ? ? ? [self.navigationController.view.layer addAnimation:transition forKey:kCATransition];
? ? ? ? [self.navigationController popViewControllerAnimated:NO];
? ? }
