SpringWithDamping for CALayer animations?

Question

After playing around a lot with the UIView dynamic animations introduced in iOS 7, most notably:

[UIView animateWithDuration: delay: usingSpringWi         


        

Answer 1

There is (and have been for a while) a private class called CASpringAnimation that I'm pretty sure is being used behind it all (but I haven't verified it). Unfortunately, it is still private.