Re: Change duration of a running CAAnimation?
Re: Change duration of a running CAAnimation?
- Subject: Re: Change duration of a running CAAnimation?
- From: Matt Neuburg <email@hidden>
- Date: Fri, 26 Nov 2010 08:51:24 -0800
On Thu, 25 Nov 2010 20:40:57 +0200, Oleg Krupnov <email@hidden> said:
>Is there a way to change the duration of an already running
>CAAnimation, in order to change its speed?
>
>The animation is added explicitly via [layer addAnimation: forKey:]
>
>When I try to get the animation with [layer animationForKey:] and call
>[animation setDuration:], I get an exception that I'm trying to modify
>a readonly animation.
>
>I know I could cancel the current animation and start a new one using
>the current [layer presentationLayer]'s value as the fromValue, but
>this is not convenient because my animation is repetitive and after
>such a manipulation it will start from a wrong fromValue on the next
>loop.
Nevertheless that's what you're probably going to have to do. The +timeOffset+ property may assist you here in starting the new animation "in the middle"; also, observe that +repeatCount+ is a float (it does not have to indicate an integral number of repetitions). m.
--
matt neuburg, phd = email@hidden, <http://www.apeth.net/matt/>
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