setRequiredContentSizeIdentifiers - deprecated in iOS 6
ADBannerContentSizeIdentifier320x50 - deprecated in iOS 4.2
ADBannerContentSizeIdentifier480x32 - deprecated in iOS 4.2
setCurrentContentSizeIdentifier - deprecated in iOS 6
ADBannerContentSizeIdentifier480x32 - deprecated in iOS 4.2

- (int)getBannerHeight:(UIDeviceOrientation)orientation
{
    if (UIInterfaceOrientationIsLandscape(orientation)) {
        return 32;
    } else {
        return 50;
    }
}

- (int)getBannerHeight
{
    return [self getBannerHeight:[UIDevice currentDevice].orientation];
}

- (void)createAdBannerView
{
    Class classAdBannerView = NSClassFromString(@"ADBannerView");
    if (classAdBannerView != nil) {
        self->adView = [[classAdBannerView alloc]
                              initWithFrame:CGRectZero];
        [adView setRequiredContentSizeIdentifiers:[NSSet setWithObjects:
                                                          ADBannerContentSizeIdentifier320x50,
                                                          ADBannerContentSizeIdentifier480x32, nil]];
        if (UIInterfaceOrientationIsLandscape([UIDevice currentDevice].orientation)) {
            [adView setCurrentContentSizeIdentifier:
             ADBannerContentSizeIdentifier480x32];
        } else {
            [adView setCurrentContentSizeIdentifier:
             ADBannerContentSizeIdentifier320x50];
        }
        [adView setFrame:CGRectOffset([adView frame], 0,
                                             -[self getBannerHeight])];
        [adView setDelegate:self];

        [self.view addSubview:adView];
    }
}

- (void)fixupAdView:(UIInterfaceOrientation)toInterfaceOrientation
{
    if (adView != nil) {
        if (UIInterfaceOrientationIsLandscape(toInterfaceOrientation)) {
            [adView setCurrentContentSizeIdentifier:
             ADBannerContentSizeIdentifier480x32];
        } else {
            [adView setCurrentContentSizeIdentifier:
             ADBannerContentSizeIdentifier320x50];
        }
        [UIView beginAnimations:@"fixupViews" context:nil];
        if (bannerIsVisible) {
            CGRect adBannerViewFrame = [adView frame];
            adBannerViewFrame.origin.x = 0;
            adBannerViewFrame.origin.y = 0;
            [adView setFrame:adBannerViewFrame];
            CGRect contentViewFrame = _contentView.frame;
            contentViewFrame.origin.y =
            [self getBannerHeight:toInterfaceOrientation];
            contentViewFrame.size.height = self.view.frame.size.height -
            [self getBannerHeight:toInterfaceOrientation];
            _contentView.frame = contentViewFrame;
        } else {
            CGRect adBannerViewFrame = [adView frame];
            adBannerViewFrame.origin.x = 0;
            adBannerViewFrame.origin.y =
            -[self getBannerHeight:toInterfaceOrientation];
            [adView setFrame:adBannerViewFrame];
            CGRect contentViewFrame = _contentView.frame;
            contentViewFrame.origin.y = 0;
            contentViewFrame.size.height = self.view.frame.size.height;
            _contentView.frame = contentViewFrame;
        }
        [UIView commitAnimations];
    }
}

ADBannerContentSizeIdentifier320x50 - deprecated in iOS 4.2