pushViewController:animated:, :
-(void)pushToF {
UINavigationController *nav = self.navigationController;
UIViewController *b =[self.storyboard instantiateViewControllerWithIdentifier:@"B"];
[nav pushViewController:b animated:NO];
UIViewController *c =[self.storyboard instantiateViewControllerWithIdentifier:@"C"];
[nav pushViewController:c animated:NO];
...
UIViewController *f =[self.storyboard instantiateViewControllerWithIdentifier:@"F"];
[nav pushViewController:f animated:YES];
}