How to slide in/out statusBar and navigationBar simultaneously?

Question

I'd like to show and hide the statusBar and the navigationBar simultaneously using a slide effect.

This is how I tried:

[[UIApplication sharedApplication] setStatusBarHidden:hide withAnimation:UIStatusBarAnimationSlide];
[self.navigationController setNavigationBarHidden:hide animated:animated];

However, the duration of both animation is not the same. The status bar animation takes longer. I found no way how to specify the duration of either animation. Did I miss something obvious?

Answer 1

ios-lizard's answer is almost what I wanted but the navigation bar re-appears when rotating the device unless hidden is set correctly. So this worked for me:

Hidding animating works/looks nice YEAH!!.

Showing animation is OK, (I wish I could make the status bar slide with the navigation bar but at least we don't see gaps anymore. :D )

- (void)toggleFullscreen {

    UINavigationBar *navBar = self.navigationController.navigationBar;
    CGRect statusBarFrame = [[UIApplication sharedApplication] statusBarFrame];
    float animationDuration;
    if(statusBarFrame.size.height > 20) { // in-call
        animationDuration = 0.5;
    } else { // normal status bar 
        animationDuration = 0.6;
    }

    _fullscreen = !_fullscreen;
    if (_fullscreen) { 
        // Change to fullscreen mode
        // Hide status bar and navigation bar
        [[UIApplication sharedApplication] setStatusBarHidden:YES
                                                withAnimation:UIStatusBarAnimationSlide];
        [UIView animateWithDuration:animationDuration animations:^{
            navBar.frame = CGRectMake(navBar.frame.origin.x,
                                  -navBar.frame.size.height,
                                  navBar.frame.size.width,
                                  navBar.frame.size.height);
        } completion:^(BOOL finished) {
            [self.navigationController setNavigationBarHidden:YES animated:NO];
        }];

    } else {
        // Change to regular mode
        // Show status bar and navigation bar
        [[UIApplication sharedApplication] setStatusBarHidden:NO
                                                withAnimation:UIStatusBarAnimationSlide];
        [UIView animateWithDuration:animationDuration animations:^{
             navBar.frame = CGRectMake(navBar.frame.origin.x,
                                       statusBarFrame.size.height,
                                       navBar.frame.size.width,
                                       navBar.frame.size.height);
        } completion:^(BOOL finished) {
            [self.navigationController setNavigationBarHidden:NO animated:NO];
        }];

    }

}