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    <p>Having the exact same issue...</p> <p>Although I am unable to get the CALayer shadow on a view to animate nicely, at least the shadow does re-align properly after animation.</p> <p>My solution (which works fine in my application) is the set the shadowOpacity to 0, then reset it to the desired value AFTER the animation has completed. From a user's perspective, you cannot even tell the shadow is gone because the animations are typically too fast to perceive the difference.</p> <p>Here is an example of some code in my application, in which I am changing the constant value of a constraint, which is 'trailing edge to superview' NSLayoutContraint:</p> <pre><code>- (void) expandRightEdge { [self.mainNavRightEdge setConstant:newEdgeConstant]; [self updateCenterContainerShadow]; [UIView animateWithDuration:ANIMATION_DURATION delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{ [[NSNotificationCenter defaultCenter] postNotificationName:@"PanelLayoutChanged" object:nil]; [self.view layoutIfNeeded]; } completion:^(BOOL finished) { nil; }]; } - (void) updateCenterContainerShadow { self.centerContainer.layer.masksToBounds = NO; self.centerContainer.layer.shadowOpacity = 0.8f; self.centerContainer.layer.shadowRadius = 5.0f; self.centerContainer.layer.shadowOffset = CGSizeMake(0, 0); self.centerContainer.layer.shadowColor = [UIColor blackColor].CGColor; CGPathRef shadowPath = [UIBezierPath bezierPathWithRect:self.centerContainer.layer.bounds].CGPath; [self.centerContainer.layer setShadowPath:shadowPath]; // Schedule a time to fade the shadow back in until we can figure out the CALayer + Auto-Layout issue [self performSelector:@selector(fadeInShadow) withObject:nil afterDelay:ANIMATION_DURATION+.05]; } - (void) fadeInShadow { [self.centerContainer.layer setShadowOpacity:0.8f]; } </code></pre> <p>Two things:</p> <ul> <li>I could have put the fadeInShadow in the completion block, but due to the way some of my other code is factored, this works better for me.</li> <li>I realize I am not performing a fade in with "fadeInShadow", but given how quickly it renderes after the completion of the animation, I found it is not necessary.</li> </ul> <p>Hope that helps!</p>
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    1. POAutolayout and shadow
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    1. COYou can use CABasicAnimation to animate the shadow too: http://stackoverflow.com/questions/11515647/objective-c-cabasicanimation-applying-changes-after-animation
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