This is probably the simplest way to do it: http://developer.apple.com/library/mac/#qa/qa1673/_index.html
On Nov 9, 2012, at 11:53 AM, Eric E. Dolecki <edole...@gmail.com> wrote: > I have a UIImageView that I spin forever (think a top-down view of a spool > in a tape cassette). However I would like to stop the rotation animation & > when it does NOT reset the UIImageView to it's original starting position. > > I have this to start it: > > CAKeyframeAnimation *rotationAnimation; > > rotationAnimation = [CAKeyframeAnimation animationWithKeyPath:@ > "transform.rotation.z"]; > > > > rotationAnimation.values = [NSArray arrayWithObjects: > > [NSNumber numberWithFloat:0.0 * M_PI], > > [NSNumber numberWithFloat:0.75 * M_PI], > > [NSNumber numberWithFloat:1.5 * M_PI], > > [NSNumber numberWithFloat:2.0 * M_PI], nil]; > > rotationAnimation.calculationMode = kCAAnimationPaced; > > > > rotationAnimation.removedOnCompletion = NO; > > rotationAnimation.fillMode = kCAFillModeForwards; > > rotationAnimation.timingFunction = [CAMediaTimingFunction > functionWithName:kCAMediaTimingFunctionLinear]; > > rotationAnimation.duration = 5.0; > > rotationAnimation.repeatCount = INFINITY; > > CALayer *layer = [leftSpool layer]; > > > > [layer addAnimation:rotationAnimation forKey:@"rotationAnimation"]; > > And this to stop it: > > //This is resetting the rotation to 0 - a visible jump > > [leftSpool.layer removeAnimationForKey:@"rotationAnimation"]; > > > I am looking for a way to start it, stop at current angle, and then restart > at current angle... > _______________________________________________ > > 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 -- David Duncan _______________________________________________ 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
