UIViewControllerAnimatedTransitioning in iOS7 - viewWillAppear not called - ios

Question

I'm trying to get the hang of the new viewController animations in ios7 but I am encountering a road bump when trying to use core animation.
Im finding that after the transition has completed, the controller of the 'to view' does not seem to be receiving the typical view lifecycle methods, i.e. viewWillAppear and viewDidAppear. I'm calling completeTransition: but that doest seem to be enough -- is this typical behavior? Or am I doing something wrong? here is my code:
-(void)executeDismissalAnimation:(id<UIViewControllerContextTransitioning>)transitionContext{
UIView *inView = [transitionContext containerView];
UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
toViewController.view.hidden = NO;
[CATransaction begin];
[CATransaction setCompletionBlock:^{
[fromViewController.view removeFromSuperview];
[transitionContext completeTransition:YES];
}];
CGFloat duration = 0.4f;
CAKeyframeAnimation *scaleAnimation = [CAKeyframeAnimation animationWithKeyPath:#"transform.scale"];
scaleAnimation.values = [self floatValuesFromValue:1.f toValue:1.5f withEasingFunction:ExponentialEaseInOut];
scaleAnimation.duration = duration;
scaleAnimation.fillMode = kCAFillModeForwards;
scaleAnimation.removedOnCompletion = YES;
[fromViewController.view.layer addAnimation:scaleAnimation forKey:nil];
CAKeyframeAnimation *alphaAnimation = [CAKeyframeAnimation animationWithKeyPath:#"opacity"];
alphaAnimation.values = [self floatValuesFromValue:1.f toValue:0.f withEasingFunction:LinearInterpolation];
alphaAnimation.duration = duration*2;
alphaAnimation.fillMode = kCAFillModeForwards;
alphaAnimation.removedOnCompletion = YES;
[fromViewController.view.layer addAnimation:alphaAnimation forKey:nil];
CAKeyframeAnimation *scaleAnimationB = [CAKeyframeAnimation animationWithKeyPath:#"transform.scale"];
scaleAnimationB.values = [self floatValuesFromValue:0.6f toValue:1.0f withEasingFunction:ExponentialEaseInOut];
scaleAnimationB.duration = duration;
scaleAnimationB.beginTime = CACurrentMediaTime()+0.3;
scaleAnimationB.fillMode = kCAFillModeForwards;
scaleAnimationB.removedOnCompletion = NO;
[toViewController.view.layer addAnimation:scaleAnimationB forKey:nil];
CAKeyframeAnimation *alphaAnimationB = [CAKeyframeAnimation animationWithKeyPath:#"opacity"];
alphaAnimationB.values = [self floatValuesFromValue:0.5f toValue:1.f withEasingFunction:LinearInterpolation];
alphaAnimationB.duration = duration;
alphaAnimationB.beginTime = CACurrentMediaTime()+0.3;
alphaAnimationB.fillMode = kCAFillModeForwards;
alphaAnimationB.removedOnCompletion = NO;
[toViewController.view.layer addAnimation:alphaAnimationB forKey:nil];
[CATransaction commit];
}