How to detect circular gesture via Gesture Recognizer?

Question

I am trying to implement a volume-control-like round button. Currently I can detect swipes by the Gesture Recognizer. How can I detect a circular gesture (clockwise and anti

Answer 1

Best Way would be implement Custom Gesture Recognizer. I do not know if you wish to detect a Discreet Gesture (Event Handling method would be called once the full circle has been detected) or a Continues Gesture (Event Handling method would be called every time you move your finger on a circular Path).

Probably, the user may not draw a perfect circle, and the solution provided by @Sixten Otto would be good.