drawRect and addSubview: custom drawing affects which views?

Question

If I have a custom subclass of UIView that implements drawRect and controller methods use addSubview to create a view hierarchy in this cu

Answer 1

-drawRect: doesn't interact with subviews. It draws whatever the view it's sent to wants to draw in the rect it's given.

Would it be acceptable to programmatically add and remove subviews within drawRect?

NO. -drawRect: is for drawing, not for manipulating the view hierarchy.