gistfile1.m

- (void)performLayout
{
    [super performLayout];

    myScrubView.frame = self.bounds;
    BOOL reload = NO;

    UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
    if (orientation == UIInterfaceOrientationPortrait)
    {
        myPortraitView = [self _viewBySwitchingFromView:myLandscapeView toView:myPortraitView];
    }
    else
    {
        myLandscapeView = [self _viewBySwitchingFromView:myPortraitView toView:myLandscapeView];
    }
    
    if (reload)
        [self reloadData];
}

- (NSView *)_viewBySwitchingFromView:(NSView *)aFromView toView:(NSView *)aToView {
    aFromView.alpha = 0.0;
    if (aToView) {
        aToView.alpha = 1.0;
    } else {
        aToView = [[UIView alloc] init];
        [myScrubView addSubview:aToView];
        reload = YES;
    }
    aToView.frame = myScrubView.bounds;
    return aToView;
}