popspringanimation very choppy in UINavigationController Delegate - ios

Question

In UINavigationController Delegate I add pop animation in the transition, what I did is as following:
- (NSTimeInterval) transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext {
return self.duration;
}
- (void) animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext {
UIView *containerView = [transitionContext containerView];
UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
// I get some cell from initialization
UIImageView *avatarImage = [[UIImageView alloc] initWithFrame:frame];
avatarImage.image = _cell.avatarImageView.image;
avatarImage.clipsToBounds = YES;
avatarImage.layer.cornerRadius = avatarImage.frame.size.width/2.0;
CGFloat originSize = avatarImage.frame.size.width;
[fromViewController.view addSubview:avatarImage];
CGFloat avatarSize = CURRENT_SCREEN_WIDTH * 0.15;
CGFloat avatarPositionY = CURRENT_SCREEN_WIDTH * 0.4;
POPSpringAnimation *animation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerPosition];
animation.toValue = [NSValue valueWithCGPoint:CGPointMake(CURRENT_SCREEN_WIDTH/2.0, avatarPositionY + avatarSize/2.0 - 64)];
animation.springBounciness = 2.0;
[avatarImage.layer pop_addAnimation:animation forKey:#"move"];
[UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{
toViewController.view.alpha = 1;
} completion:^(BOOL finished) {
[transitionContext completeTransition:![transitionContext transitionWasCancelled]];
[imageView removeFromSuperview];
[avatarImage removeFromSuperview];
}];
}
But the problem is, it's not smooth at all, what is the problem ?

Answer 1

There can be multiple problems;
Your image is very big (in memory)
The corner radius isn't helping either
You're doing something else on the main thread during during this animation
Try the following and see if the animation is smooth after each change:
Remove/comment:
avatarImage.image = _cell.avatarImageView.image;
Remove/comment:
avatarImage.clipsToBounds = YES;
avatarImage.layer.cornerRadius = avatarImage.frame.size.width/2.0;