Yes, yes there is… If you want both a corner radius and a drop shadow, you don’t turn on -masksToBounds, but rather set the corner radius and set the bezier path of the shadow with a rounded rect. Keep the radius of the two the same: [layer setShadowOffset:CGSizeMake(0, 3)]; [layer setShadowOpacity:0.4]; [layer setShadowRadius:3.0f]; [layer setShouldRasterize:YES]; … Read more
This is an old question but I came across this answer while trying to find the current rotation angle during a key frame animation:- CALayer* layer = [self.layer presentationLayer]; float currentAngle = [[layer valueForKeyPath:@”transform.rotation.z”] floatValue]; Seems to work for me. Also, nice and concise.
I’m pretty sure that it’s not possible, because when you change the frame of your view it takes effect immediately. In the background, Core Animation takes care of the animation. So, even if you could grab the frame, it’d give you the final coordinates, not the current coordinates in the midst of an animation. Access … Read more
tl;dr: It is very easy to misuse removeOnCompletion = NO and most people don’t realize the consequences of doing so. The proper solution is to change the model value “for real”. First of all: I’m not trying to judge or be mean to you. I see the same misunderstanding over and over and I can … Read more
If you’re willing to step up to iOS 4.0, the new blocks-based animation approach can make this animation chaining trivial. For example: [UIView animateWithDuration:1.0 animations:^{ view.position = CGPointMake(0.0f, 0.0f); } completion:^(BOOL finished){ [UIView animateWithDuration:0.2 animations:^{ view.alpha = 0.0; } completion:^(BOOL finished){ [view removeFromSuperview]; }]; }] will cause view to animate to (0, 0) over a … Read more
The frame property of a CALayer is a derived property, dependent on the position, anchorPoint, bounds and transform of the layer. Instead of animating the frame, you should instead animate the position or bounds, depending on what effect you are trying to accomplish. To move a layer, you can animate the position: -(void)moveLayer:(CALayer*)layer to:(CGPoint)point { … Read more
UIKit disables implicit animations. To be more specific, a CALayer associated with a UIView will never implicitly animate. CALayers that you create yourself and that are not associated with a UIView will buy into the normal implicit animation machinery. If you’re interested in how this works, implicit animations happen after the normal -actionForKey: lookup. If … Read more
You don’t need to wrap CGColorRefs when setting the toValue or fromValue properties of a CABasicAnimation. Simply use the CGColorRef. To avoid the compiler warning, you can cast the CGColorRef to an id. In my sample app, the following code animated the background to red. CABasicAnimation* selectionAnimation = [CABasicAnimation animationWithKeyPath:@”backgroundColor”]; selectionAnimation.toValue = (id)[UIColor redColor].CGColor; [self.view.layer … Read more
You can also use animation grouping and use the beginTime field of the animation. Try something like this: CABasicAnimation *posAnimation = [CABasicAnimation animationWithKeyPath:@”position”]; [posAnimation setFromValue:[NSNumber numberWithFloat:0.0]]; [posAnimation setToValue:[NSNumber numberWithFloat:1.0]]; // Here’s the important part [posAnimation setDuration:10.0]; [posAnimation setBeginTime:0.0]; CABasicAnimation *borderWidthAnimation = [CABasicAnimation animationWithKeyPath:@”borderWidth”]; [borderWidthAnimation setFromValue:[NSNumber numberWithFloat:0.0]]; [borderWidthAnimation setToValue:[NSNumber numberWithFloat:1.0]]; // Here’s the important part [borderWidthAnimation … Read more
Okay, so I figured this out. Turns out UIView’s block animation by default blocks user interaction, and to get around it you need to pass UIViewAnimationOptionAllowUserInteraction as one of the options. Hopefully someone else will have some use of this information as well.