iOS Swift Time Based Line Draw

Question

I want to draw almost like a racetrack shape as a black bar that draws itself over time.

I have not really worked with drawing stuff in iOS so I have no idea where to start. Any help would be appreciated.

Core Concept : Draw a line in a racetrack shape over a time span.

Answer 1

http://oleb.net/blog/2010/12/animating-drawing-of-cgpath-with-cashapelayer/

Did provide the solution, thank you luk2302