>
> It should work to do:
>
> [view layoutSubtreeIfNeeded];
> [NSAnimationContext runAnimationGroup:^(NSAnimationContext *context){
> context.duration = 0.25; // you can leave this out if the default is
> acceptable
> context.allowsImplicitAnimation = YES;
> [view updateConstraintsAndVariousViewPropertiesForState:state];
> [view layoutSubtreeIfNeeded];
> } completionHandler:nil];
>
> This does require layer-backed views. It may be that you can leave out
> setting allowsImplicitAnimation if you use the view's animator for the second
> -layoutSubtreeIfNeeded, but I'm not sure. Supposedly, the animator turns on
> implicit animation, but I don't know if that's only when setting animatable
> properties.
Thanks - that works perfectly, even animates the ‘hidden’ property smoothly
which I wasn’t getting with the animator proxy. I’ve yanked out most of the
proxies from the update method, don’t need them and it makes the code scruffy.
Now I know what I am looking for (NSAnimationContext runAnimationGroup..) I did
find an example in the docs, however it’s wrong and uses ‘[ NSView
layoutIfNeeded ]’ for the OSX example instead of layoutSubtreeIfNeeded .. you
can guess which method I was googling on :(
I’ll add ‘turn on layer-backed views’ to my OSX checklist, it seems like they
may act more like the world I’m used to. Pleased I learned UIKit first or I
wouldn’t even know what questions to ask, although even UIKit is slowly
crufting up.
One animation to go and it’s shipping time !
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