在细胞动画结束后更改细胞子视图高度Swift

Question

I use Swift 3.0 and have tableViewCell and its subview. I use heightForRowAt function to change cellView height.

I have two states of cellView : default and expanded. CellViewSubview has visible borders.

CellView and cellViewSubview are connected with leading , trailing , top and bottom constraints. When I change the height of the cellView , cellViewSubview automatically changes its height to fit. Also I need to say that cellView is changing with animation, I use the following to implement this:

tableView.beginUpdates()
tableView.endUpdates()

Everything works fine except that the cellViewSubview height is changed instantly without animation. So it means that I see how cellViewSubview border 'jumps' to the top without animation.

I faced with this problem only in IOS 10.0 . In IOS < 10.0 animation was simultaneous. How to make the cellView and the cellViewSubview change their height simultaneously with animation?

Answer 1

Solution that worked for me:

I've stopped using bottom equal constraint between cellView and cellViewSubview . Instead of it I've set height constraint to the cellViewSubview and change its height after heightForRowAt is complete.