Take the 2-minute tour ×  I have a formula for setting x and y
of an object at every frame. In a classic for (i=0; i < x; i++)
loop, I can bind it to the i value and calculate x and y values
based on the current value of i that represents the passing of
time.  I intended to use it with a NSTimer object and update the
coordinate points at every tick, but I've seen that NSTimer is
descouraged for animations.  Can I do the same with Core
Animation? Instead of the standard "from here to there in given
seconds", I would need a method to "update the position with
this formula".  share|improve this question Good question..I
would like to know too.. –  Krishnabhadra May 6 '11 at 6:55 I
haven't used it myself, and hopefully someone can give you more
details, but CAKeyframeAnimation is probably what you want. – 
Josh Caswell May 6 '11 at 7:04 add comment  1 Answer  up vote 3
down vote accepted  If you can model your function with a cubic
Bézier curve, you can create a custom CAMediaTimingFunction
instance and assign it