When you add an animation to a layer, the animation does not change the layer’s properties. Instead, the system creates a copy of the layer. The original layer is called the model layer, and the duplicate is called the presentation layer. The presentation layer’s properties change as the animation progresses, but the model layer’s properties … Read more
Shouldn’t you be using the [CAMediaTiming beginTime] property (reference)? See Customizing the Timing of an Animation in the Core Animation Programming Guide. CABasicAnimation *animation; animation.beginTime = CACurrentMediaTime() + 0.3; //0.3 seconds delay
When you call the fadeIn and fadeOut methods back to back like you’re doing, the code is run instantaneously, so you’ll only see animation from the last method called. UIView block based animation provides a completion handler, which seems to be exactly what you’re looking for. So your code might looks something like this: -(IBAction)startFade:(id)sender … Read more
Hey I had stumbled upon the same thing in my game, and ended up finding a somewhat different solution than you, which you may like 🙂 I figured I should share the workaround I found… My case is using UIView/UIImageView animations, but it’s basically still CAAnimations at its core… The gist of my method is … Read more
The simplest way to remove all sublayers from a layer is to set the sublayer property to nil: rootLayer.sublayers = nil;
I made a right border using this: leftScrollView.clipsToBounds = YES; CALayer *rightBorder = [CALayer layer]; rightBorder.borderColor = [UIColor darkGrayColor].CGColor; rightBorder.borderWidth = 1; rightBorder.frame = CGRectMake(-1, -1, CGRectGetWidth(leftScrollView.frame), CGRectGetHeight(leftScrollView.frame)+2); [leftScrollView.layer addSublayer:rightBorder];
tl;dr: Corner radius is not animatable in animateWithDuration:animations:. What the documentation says about view animations. As the section on Animations in the “View Programming Guide for iOS” says Both UIKit and Core Animation provide support for animations, but the level of support provided by each technology varies. In UIKit, animations are performed using UIView objects … Read more
They are different names because UIView and CALayer are different and have different terminology associated with them, but they are functionally equivalent. If you disassemble clipsToBounds you will see it just calls masksToBounds (disassembly from the simulator framework, so x86): -(BOOL)[UIView(Rendering) clipsToBounds] +0 3091938a 55 pushl %ebp +1 3091938b 89e5 movl %esp,%ebp +3 3091938d e800000000 … Read more
There are many parts to your question. Getting the path Creating the path for such a segment shouldn’t be too hard. There are two arcs and two straight lines. I’ve previously explained how you can break down a path like that so I won’t do it here. Instead I’m going to be fancy and create … Read more
You could use a CATransaction, it has a completion block handler. [CATransaction begin]; CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@”strokeEnd”]; [pathAnimation setDuration:1]; [pathAnimation setFromValue:[NSNumber numberWithFloat:0.0f]]; [pathAnimation setToValue:[NSNumber numberWithFloat:1.0f]]; [CATransaction setCompletionBlock:^{_lastPoint = _currentPoint; _currentPoint = CGPointMake(_lastPoint.x + _wormStepHorizontalValue, _wormStepVerticalValue);}]; [_pathLayer addAnimation:pathAnimation forKey:@”strokeEnd”]; [CATransaction commit];