If you’re targeting iOS 4.0 upwards you can use animation blocks instead: [UIView animateWithDuration:0.2 animations:^{view.alpha = 0.0;} completion:^(BOOL finished){ [view removeFromSuperview]; }]; (above code comes from Apple’s UIView documentation)
I’m curious why none of these answers mention the zPosition attribute on CALayer. Core Animation looks at this attribute to figure out layer rendering order. The higher the value, the closer it is to the front. These answers all work as long as your zPosition is 0, but to easily bring a layer to the … Read more
The answer by Vinzius is very cool. However the wobble only rotates from 0 Radians to 0.08. Thus the wobble can look a little unbalanced. If you get this same issue then you may want to add both a negative and a positive rotation by using a CAKeyframeAnimation rather than a CABasicRotation: – (CAAnimation*)getShakeAnimation { … Read more
I know this is an old question but I can provide you a solution which appears similar to Mr Lockwoods approach. Sadly the source code here is swift so you will need to convert it to ObjC. As mentioned before if the layer is a backing layer for a view you can intercept the CAAction’s … Read more
I’ll try to answer your question at a conceptual, 20,000ft level. I will try to disclaim my points where I’m over-generalizing, but I’ll attempt to hit the common case. Perhaps the easiest way to think about it is this: In the GPU’s memory you have textures which, for the purposes of this discussion, are bitmap … Read more
I’ve created a kit for doing this on iOS: https://github.com/hfossli/AGGeometryKit/ Make sure your anchor point is top left (CGPointZero). + (CATransform3D)rectToQuad:(CGRect)rect quadTL:(CGPoint)topLeft quadTR:(CGPoint)topRight quadBL:(CGPoint)bottomLeft quadBR:(CGPoint)bottomRight { return [self rectToQuad:rect quadTLX:topLeft.x quadTLY:topLeft.y quadTRX:topRight.x quadTRY:topRight.y quadBLX:bottomLeft.x quadBLY:bottomLeft.y quadBRX:bottomRight.x quadBRY:bottomRight.y]; } + (CATransform3D)rectToQuad:(CGRect)rect quadTLX:(CGFloat)x1a quadTLY:(CGFloat)y1a quadTRX:(CGFloat)x2a quadTRY:(CGFloat)y2a quadBLX:(CGFloat)x3a quadBLY:(CGFloat)y3a quadBRX:(CGFloat)x4a quadBRY:(CGFloat)y4a { CGFloat X = rect.origin.x; CGFloat Y … Read more
No need to do the completion block approach, just use the animation options argument: updated for Swift 3.0 UIView.animate(withDuration: 2.0, delay: 0, options: [.repeat, .autoreverse], animations: { coloredSquare.frame = CGRect(x: 120, y: 220, width: 100, height: 100) }, completion: nil) If for any reason you want to stop the animation later, just use: coloredSquare.layer.removeAllAnimations()
I think this is a more efficient solution: Swift: let anim = CAKeyframeAnimation( keyPath:”transform” ) anim.values = [ NSValue( CATransform3D:CATransform3DMakeTranslation(-5, 0, 0 ) ), NSValue( CATransform3D:CATransform3DMakeTranslation( 5, 0, 0 ) ) ] anim.autoreverses = true anim.repeatCount = 2 anim.duration = 7/100 viewToShake.layer.addAnimation( anim, forKey:nil ) Obj-C: CAKeyframeAnimation * anim = [ CAKeyframeAnimation animationWithKeyPath:@”transform” ] ; … Read more
You were almost there. CABasicAnimation *crossFade = [CABasicAnimation animationWithKeyPath:@”contents”]; crossFade.duration = 5.0; crossFade.fromValue = image1.CGImage; crossFade.toValue = image2.CGImage; [self.imageView.layer addAnimation:crossFade forKey:@”animateContents”]; Note that the animation is independent of the actual values/contents of the UIImageView. Therefore you’ll need to self.imageView.image = image2; … to set the final result for your image.
A layer backed view contains Cocoa or Cocoa Touch UI controls and can be animated using the animator proxy. Layer backed views allow you to animate your UI and help to reduce the overhead of drawing by caching the views contents on a core animation layer. Create a Layer backed view by setting the wants … Read more