Calculating Spring Velocity

UIView has an incredibly useful spring-based animation API, but it can be difficult to know what to use for the damping and initial spring velocity parameters. In this episode, we'll break down how to compute the velocity value using the values we get from our UIPanGestureRecognizer and a little math.

This is a companion discussion topic for the original entry at https://nsscreencast.com/episodes/232-calculating-spring-velocity