UIView frames reset when using autolayout

Question

I'm facing an issue. I'm working on an app and I'm using storyboard with Autolayout enabled. Now on one of my UIViewControllers I have placed a UIView (say A). Now A has multiple subviews (UIViews to be precise). I have applied the "Horizontally and Vertically centered" constraint on A. The subviews inside A don't have any constraints on them.

Now in my code I have a method for animating the subviews that are inside A. Inside that method I call the UIView's animation method...

[UIView animateWithDuration: delay: options: animations: completion:];

and animate one of the subview's inside View A. Now the problem is that these frame changes don't persist. When I modal a view controller on current view controller and then dismiss it the frames of all the subviews inside A get reset.

I searched for it and found out the problem is occuring because of Autolayout. I disabled it and then tried again and everything worked well.

But what is the workaround with Autolayout enabled...?

Am I missing something...?

The interesting thing is that many posts on StackOverflow suggested that

we should animate the constraints and NOT the frames when using autolayout.

BUT I haven't applied any constraints on the subviews that are inside View A. Constraints are only applied on View A.

Thanks.

Answer 1

For all the views that you are animating write the following code in viewDidLoad

myViewToAnimate.translatesAutoresizingMaskIntoConstraints = YES;

Hope this helps