In this tutorial, you will learn the Core Graphics drawing model and how it dictates the order in the order that you draw your shapes. You’ll also learn how to draw Quadratic and Bezier curves as well as applying transforms to existing shapes. Finally, you’ll use Core Graphics layers to clone your drawings with the ease and style of a James Bond super-villian.
This is a companion discussion topic for the original entry at https://www.raywenderlich.com/34003/core-graphics-tutorial-curves-and-layers