iAd not showing up after dismissModalViewControllerAnimated

I used the shared SharedAdBannerView sample code by Apple for implementing iAd. The iAd loads fine on initial launch on the main view as well as the subsequent view controllers when I use the present modal view. It even works when I push through 2 layers of table view (but the table view doesn't have iAd) and finally get to a detailed view controller view.

But when I go back to the main view using the dismissModalViewController, the iAd is hidden on the main view. I tried debugging and it seems the layoutForCurrentOrientation method below is being called before the main view comes back.

Does anyone have a similar issue? How to I call the layoutForCurrentOrientation after the dismissModalViewController is done and the main view is done animating?

Code:

- (void)createADBannerView
{
    // --- WARNING ---
    // If you are planning on creating banner views at runtime in order to support iOS targets that don't support the iAd framework
    // then you will need to modify this method to do runtime checks for the symbols provided by the iAd framework
    // and you will need to weaklink iAd.framework in your project's target settings.
    // See the iPad Programming Guide, Creating a Universal Application for more information.
    // http://developer.apple.com/iphone/library/documentation/general/conceptual/iPadProgrammingGuide/Introduction/Introduction.html
    // --- WARNING ---
    
    ADBannerView *adBanner = SharedAdBannerView;
	
	// Depending on our orientation when this method is called, we set our initial content size.
    // If you only support portrait or landscape orientations, then you can remove this check and
    // select either ADBannerContentSizeIdentifierPortrait (if portrait only) or ADBannerContentSizeIdentifierLandscape (if landscape only).
	NSString *contentSize;
	if (&ADBannerContentSizeIdentifierPortrait != nil)
	{
		contentSize = UIInterfaceOrientationIsPortrait(self.interfaceOrientation) ? ADBannerContentSizeIdentifierPortrait : ADBannerContentSizeIdentifierLandscape;
	}
	else
	{
		// user the older sizes 
		contentSize = UIInterfaceOrientationIsPortrait(self.interfaceOrientation) ? ADBannerContentSizeIdentifier320x50 : ADBannerContentSizeIdentifier480x32;
    }
	
	// Calculate the intial location for the banner.
    // We want this banner to be at the bottom of the view controller, but placed
    // offscreen to ensure that the user won't see the banner until its ready.
    // We'll be informed when we have an ad to show because -bannerViewDidLoadAd: will be called.
    CGRect frame;
    frame.size = [ADBannerView sizeFromBannerContentSizeIdentifier:contentSize];
    frame.origin = CGPointMake(0.0f, CGRectGetMaxY(self.view.bounds));
    
    // Now set the banner view's frame
	adBanner.frame = frame;
	
    // Set the delegate to self, so that we are notified of ad responses.
	adBanner.delegate = self;
	
    // Set the autoresizing mask so that the banner is pinned to the bottom
    adBanner.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleTopMargin;
	
	// Since we support all orientations in this view controller, support portrait and landscape content sizes.
    // If you only supported landscape or portrait, you could remove the other from this set
	adBanner.requiredContentSizeIdentifiers =
    (&ADBannerContentSizeIdentifierPortrait != nil) ?
    [NSSet setWithObjects:ADBannerContentSizeIdentifierPortrait, ADBannerContentSizeIdentifierLandscape, nil] : 
    [NSSet setWithObjects:ADBannerContentSizeIdentifier320x50, ADBannerContentSizeIdentifier480x32, nil];
    
    // At this point the ad banner is now be visible and looking for an ad.
    [self.view addSubview:adBanner];
}

- (void)layoutForCurrentOrientation:(BOOL)animated
{
    ADBannerView *adBanner = SharedAdBannerView;
	
	CGFloat animationDuration = animated ? 0.2f : 0.0f;
    // by default content consumes the entire view area
    CGRect contentFrame = self.view.bounds;
    // the banner still needs to be adjusted further, but this is a reasonable starting point
    // the y value will need to be adjusted by the banner height to get the final position
	CGPoint bannerOrigin = CGPointMake(CGRectGetMinX(contentFrame), CGRectGetMaxY(contentFrame));
    CGFloat bannerHeight = 0.0f;
    
    // First, setup the banner's content size and adjustment based on the current orientation
	if (UIInterfaceOrientationIsLandscape(self.interfaceOrientation))
		adBanner.currentContentSizeIdentifier = (&ADBannerContentSizeIdentifierLandscape != nil) ? ADBannerContentSizeIdentifierLandscape : ADBannerContentSizeIdentifier480x32;
    else
        adBanner.currentContentSizeIdentifier = (&ADBannerContentSizeIdentifierPortrait != nil) ? ADBannerContentSizeIdentifierPortrait : ADBannerContentSizeIdentifier320x50; 
    bannerHeight = adBanner.bounds.size.height;
	
    // Depending on if the banner has been loaded, we adjust the content frame and banner location
    // to accomodate the ad being on or off screen.
    // This layout is for an ad at the bottom of the view.
    if (adBanner.bannerLoaded || adBannerViewIsVisible == YES)
    {
        contentFrame.size.height -= bannerHeight;
		bannerOrigin.y -= bannerHeight;
    }
    else
    {
		bannerOrigin.y += bannerHeight;
    }
    
    // And finally animate the changes, running layout for the content view if required.
    [UIView animateWithDuration:animationDuration
                     animations:^{
//                         contentView.frame = contentFrame;
//                         [contentView layoutIfNeeded];
                         adBanner.frame = CGRectMake(bannerOrigin.x, bannerOrigin.y, adBanner.frame.size.width, adBanner.frame.size.height);
                     }];
}

 

Here's the code for the present and dismiss. I tried debugging it and it finishes calling the layoutForCurrentOrientation before view is actually dismissed and the main view comes back up.

Code:

- (void)quizViewControllerDidFinish:(QuizViewController *)quiz{
	
	[self dismissModalViewControllerAnimated:YES];
    if ([[NSUserDefaults standardUserDefaults] boolForKey:kupgradePurchased] == NO && [[NSUserDefaults standardUserDefaults] integerForKey:kquizid] >= 1){
        //        [self.view addSubview:iADBanner];
        [self layoutForCurrentOrientation:NO];
        //        [self.adView resumeAdAutoRefresh];
    }
	
}

- (IBAction)loadQuiz:(id)sender {    
    QuizViewController *quiz = [[QuizViewController alloc] initWithNibName:@"QuizViewController" bundle:nil];
    quiz.delegate = self;
    quiz.adBannerViewIsVisible = adBannerViewIsVisible;
    quiz.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
    [self presentModalViewController:quiz animated:YES];
	[quiz release];
}