CATransaction Completion Block

gistfile1.rb

def logo_view_was_tapped
  CATransaction.begin
  timing = CAMediaTimingFunction.send('functionWithControlPoints::::', 0.28, -0.3, 0.12, 1.0)

  rotateAnimation = CABasicAnimation.animationWithKeyPath("transform.rotation")
  rotateAnimation.toValue = Math::PI / 180 * 720
  rotateAnimation.duration = 2.0
  rotateAnimation.timingFunction = timing
  
  CATransaction.setCompletionBlock lambda {
    # Fancy code to run when completed
  }

  @logo_view.layer.addAnimation(rotateAnimation, forKey: :logo_spinning)
  
  CATransaction.commit
end