Recalculate value as UIStackView animation proceeds

I have a stack view with 4 elements piled vertically. If I hide one element using this: [UIView animateWithDuration:0.5 animations:^{ [element setHidden:YES]; }]; An animation will start on the stack and the elements will scale proportionally to fill the space of the hidden element. Is there a way to intercept the stackview animation to do something as the animation goes? like we do with keyboards when they show/hide and we can sync another animation to happen in sync? is that possible for stackviews?