Hi Ricky, that is interesting, for some reason I assumed that the presentation layer would take care of caching the presented view.
ok, I will try that and see how it goes, thanks. is there anything else you can think of that might make a difference? - Andrew Bush > >> Im writing some code to animate an image moving up the display, just a >> simple thing moving from the bottom to the top. >> >> the image is 75x75, and Im displaying that in a CALayer sized to 45x45 by >> setting its .contents property to the .CGImage of the UIImage. > > This could be the issue. On iPhone OS, try your best not to scale any images > repeatedly. Thus, you should create an alternate version of your image at 45 > x 45 and then animate that. > >> on the newer phones this runs very smoothly, even if I have more than one of >> those CALayers animating at once, but on an older (original) iPhone I am >> testing on the animation is slightly rough/jerky even with only a single >> image moving. >> >> >> The iPhone is running 3.1.3 and I am performing the animation using this >> code: >> >> CABasicAnimation* animation = [CABasicAnimation animation]; >> animation.keyPath = @"position.y"; >> >> CGFloat from=self.position.y; >> CGFloat to=self.position.y-[self.calculator >> distanceForAnimationStartingAt:from]; >> >> animation.fromValue = [NSNumber numberWithFloat:from]; >> animation.toValue = [NSNumber numberWithFloat:to]; >> >> CGFloat distance=to-from; >> >> animation.duration = [self.calculator timeToTravelDistance:distance]; >> animation.repeatCount = 1; >> animation.autoreverses = NO; >> animation.timingFunction = [CAMediaTimingFunction functionWithName: >> kCAMediaTimingFunctionEaseInEaseOut]; >> animation.removedOnCompletion = NO; >> animation.fillMode = kCAFillModeForwards; >> animation.delegate=self; >> [self addAnimation:animation forKey:@"animateUp"]; >> >> >> so, obviously the older phone is basically just less capable, but is it >> likely to be possible to smooth things out? are there any known tricks or >> things I can do that might improve things on the older hardware? >> >> >> Thanks for any help. >> >> >> - Andrew Bush >> >> >> >> >> >> >> >> _______________________________________________ >> >> 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/rsharp%40mac.com >> >> This email sent to rsh...@mac.com > > ___________________________________________________________ > Ricky A. Sharp mailto:rsh...@instantinteractive.com > Instant Interactive(tm) http://www.instantinteractive.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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
