February 9, 2014 Custom Views Continued by Robert Van Slooten Explains how to draw a grid in a custom view using Core Graphics. It also covers object initialization methods and awakeFromNib.
February 5, 2014 View Geometry by Robert Van Slooten Introduces the basic Core Graphics C data structures; explains how to create a view and add it as a subview to a superview; explores the relationship between several UIView properties.