Here's what I ended up doing:
UIViewController *topViewController = self.slidingViewController.topViewController;
CGFloat dX = self.view.frame.size.width - self.slidingViewController.anchorRightRevealAmount;
// You can replace kSearchAnimationDuration with 0.25 or define it somewhere
[UIView animateWithDuration:kSearchAnimationDuration animations:^{
topViewController.view.layer.transform = CATransform3DTranslate(topViewController.view.layer.transform, dX, 0, 0);
}];
let me know if you have a better method.