UINavigationController 从下向上的视图切换效果

    UIViewController *newVC = [[UIViewController alloc] initWithNibName:nil bundle:nil];

    newVC.view.backgroundColor = [UIColor orangeColor];

    

    CATransition *transition = [CATransition animation];

    transition.duration = 1;

    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; 

    transition.type = kCATransitionPush; 

    transition.subtype = kCATransitionFromTop;

    transition.delegate = self; 

    [self.navigationController.view.layer addAnimation:transition forKey:nil];

    self.navigationController.navigationBarHidden = NO; 

    [self.navigationController pushViewController:newVC animated:NO];

    

    [newVC release];