Hello,
during the recent discussion "CALayer -drawInContext and GCD" it came up that
you should not use [CATransation flush] and the argument made a point that it
wasn't necessary and should be avoided because of negative consequences. I'm a
little confused now as it seems -flush does help me achieve something that I
don't know how to do otherwise.
I have delegate-drawn layers (on the main thread) whose content I want to
change without animation, I don't want to a change transition of any kind in
some situations. Up until now I'm using this:
[CATransaction flush];
[CATransaction begin];
[CATransaction setValue:(id)kCFBooleanTrue
forKey:kCATransactionDisableActions];
[self applyLayerFrame]; //changes position of the layer, layer possibly
bounds too
[layer setNeedsDisplay];
[CATransaction commit];
Which works exactly as planed, both frame and content change instantly. If I
remove the call to -flush the frame changes without animation but the content
change is animated.
Given the argument I surely must be doing something wrong. No matter where I
put the [layer setNeedsDisplay] call, the content change is always animated. It
only works like I want it if I use flush AND put -setNeedsDisplay where it is
now.
So, what's the correct method of updating a delegate-drawn layer's content
without animating the change?
Regards
Markus
PS: The GeekGameBoard demo project uses flush a lot, I think I got the idea
from there.
--
__________________________________________
Markus Spoettl
_______________________________________________
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to arch...@mail-archive.com
