Hello, Neither I did figure out how to use David's code. I thought that overriding the implicit animation implies the use of layer actions. I can't see how > [layer addAnimation:rotation forKey:@"transform"]; can change the implicit animation. Besides, most of my attempts resulted in a EXC_BAD_ACCESS crash, and the rest were not successful.
David, could you please be so kind and make your point a little more explicit ? Thank you again ! @tino : when I set removedOnCompletion to NO for the first animation, the unwanted effect disappears, but the second animation gets occulted. Rodolfo Niborski http://itunes.com/apps/yiddishforkids1-alefbeys Le 1 juin 2010 à 08:51, Tino Rachui a écrit : > David, Rodolfo, > > I'm interested in this too so please excuse me for interfering. What is the > root cause for Rodolfo's problem? He doesn't seem to set > 'removedOnCompletion' to 'NO' (default is 'YES' according to docu) so I'm > wondering if this could cause the unwanted effect (by the way I cannot see > the bad effect when I try the example in the simulator though). > David I'm sure I miss the point but how does your proposed solution solve the > problem? I'd really like to better understand. > > Thanks, > Tino > > P.S. David, are you using 'kCAValueFundtionRotateZ' intentionally or is this > a typo, same for CATransform3DMakeRotation(...)? > > > 2010/5/31 David Duncan <david.dun...@apple.com> > On May 31, 2010, at 2:24 PM, Rodolfo Niborski wrote: > > > My problem is that at the end of the first animation, the "Hello" message > > shows up in its initial position for a fraction of a second. > > I've tried to set the fillMode of the first animation to > > kCAFillModeForwards with no effect. > > What you want to do instead is set the transform of the layer rather than > trying to modify the animation to stick around. The code would be something > like this: > > CABasicAnimation *rotation = [CABasicAnimation > animationWithKeyPath:@"transform"]; > rotation.valueFunction = [CAValueFunction functionWithName: > kCAValueFunctionRotateZ]; > // setup the rest of the animation as you did previously > layer.transform = CATransform3DMakeRotation(M_PI, 0, 0, 1); > [layer addAnimation:rotation forKey:@"transform"]; > > What this does is it creates a basic animation that does the rotation, and > then overrides the implicit animation that is created when you assign the > transform to the layer. In this example I use the CAValueFunction rather than > the extended keypath as this is more efficient and much more predictable, but > doing so requires 10.6. > -- > David Duncan > Apple DTS Animation and Printing > > _______________________________________________ > > 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/tino.rachui%40googlemail.com > > This email sent to tino.rac...@googlemail.com > > > > -- > -Tino _______________________________________________ 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
