> On Sep 17, 2019, at 1:19 PM, Gabriel Zachmann via Cocoa-dev > <cocoa-dev@lists.apple.com> wrote: > > I have a layer with two animations. > > I would like to pause this animation occasionally . > To do so, I set layer.speed = 0.0; > > In the past, this has worked (with slightly different animations). > However, in this case, the layer seems to just disappear. > (the layer occupies the whole screen, and when I set speed-0, the screen is > black) > > Does anyone have an idea what might be the reason why it doesn't work? > Are there properties that do not work with speed = 0?
Setting just the speed will often return you to the “beginning of time” for your CAMediaTiming compliant object (CALayer and CAAnimation the most common compliant objects). <localTime> = (<parentTime> - beginTime) * speed + timeOffset So if you want to pause a layer, you also need to set the timeOffset to a value that matches the current value of <localTime> QA1673 has a proper implementation for doing this <https://developer.apple.com/library/archive/qa/qa1673/_index.html <https://developer.apple.com/library/archive/qa/qa1673/_index.html>> > > Thanks a lot in advance. > Gabriel. > > > _______________________________________________ > > 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: > https://lists.apple.com/mailman/options/cocoa-dev/david.duncan%40apple.com > > This email sent to david.dun...@apple.com _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
