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copied!<p>I encountered the same issue a while ago. I do not remember the reason for that issue, but this is my solution:</p> <pre><code>/** * Incrementally rotated the arrow view by a given angle. * * @param degrees Angle in degrees. * @param duration Duration of the rotation animation. */ - (void)rotateArrowViewByAngle:(CGFloat)degrees withDuration:(NSTimeInterval)duration { CABasicAnimation *spinAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"]; spinAnimation.fromValue = [NSNumber numberWithFloat:self.currentAngle / 180.0 * M_PI]; spinAnimation.toValue = [NSNumber numberWithFloat:degrees / 180.0 * M_PI]; spinAnimation.duration = duration; spinAnimation.cumulative = YES; spinAnimation.additive = YES; spinAnimation.removedOnCompletion = NO; spinAnimation.delegate = self; spinAnimation.fillMode = kCAFillModeForwards; [self.arrowView.layer addAnimation:spinAnimation forKey:@"spinAnimation"]; self.currentAngle = degrees; } </code></pre> <p>and then you can use the delegate methods</p> <pre><code>- (void)animationDidStart:(CAAnimation *)theAnimation - (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag </code></pre> <p>to rotate keep it rotating. Also, degree and duration parameters can be really high numbers... if this is enough.</p> <p>UPDATE:<br> As stated by yinkou, </p> <pre><code>spinAnimation.repeatCount = HUGE_VALF; // HUGE_VALF is defined in math.h so import it </code></pre> <p>is way better that restarting the animation in the delegate.</p> <p>PLEASE NOTE:<br> self.currentAngle is a property remembering the current final rotation. <br> I needed that to make the view rotate left and right way around.</p>

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