Top "Core-animation" questions

Core Animation is Apple's framework for performing hardware-accelerated animation of display elements on the Mac and iOS devices.

vertically align text in a CATextLayer?

I am working on a CATextLayer that I want to use in both Mac and iOS. Can I control the …

iphone macos ios core-animation text-alignment
drawViewHierarchyInRect:afterScreenUpdates: delays other animations

In my app, I use drawViewHierarchyInRect:afterScreenUpdates: in order to obtain a blurred image of my view (using Apple’s …

ios objective-c cocoa-touch core-animation
Cut Out Shape with Animation

I want to do something similar to the following: How to mask an image in IOS sdk? I want to …

ios uikit core-animation core-graphics mask
How to chain different CAAnimation in an iOS application

I need to chain animations, CABasicAnimation or CAAnimationGroup but I don't know how to do it, the only that I …

core-animation caanimation cabasicanimation
Core Animation is not working with "alpha" value

Before this code, my movie pic alpha is set to 0, CABasicAnimation* fadein= [CABasicAnimation animationWithKeyPath:@"alpha"]; [fadein setToValue:[NSNumber numberWithFloat:1.0]]; [fadein …

ios core-animation alpha cabasicanimation
Why does giving addArcWithCenter a startAngle of 0 degrees make it start at 90 degrees?

I'm creating a CAShapeLayer to use as a mask for a UIView's layer. I'm using a UIBezierPath to draw the …

ios objective-c geometry core-animation uibezierpath
How is the relation between UIView's clipsToBounds and CALayer's masksToBounds?

A UIView has a CALayer. That's pretty sure. But both seem to provide something that means the same thing. If …

ios uiview uikit core-animation calayer
iOS view transform animation

I'm probably missing something simple, but trying to do a simple "Ken Burns Effect" with an image view. First the …

objective-c ios core-animation cgaffinetransformscale
the paper folding/unfolding effect in twitter for iPad

Twitter for iPad implements a fancy "pinch to expand paper fold" effect. A short video clip here. http://www.youtube.…

ios objective-c animation core-animation
animating UITextField to indicate a wrong password

how can I add an animation to a UITextField to indicate wrong password exactly like the one in facebook app (…

iphone objective-c ios core-animation