Drawing with Core Graphics
David Mark, Jack Nutting, Kim Topley, Fredrik K. Olsson, Jeff LaMarche · Apress eBooks · 2014
Every application we’ve built so far has been constructed from views and controls that are part of the UIKit framework. You can do a lot with UIKit, and a great many applications can be constructed using only its predefined objects. Some visual elements, however, can’t be fully realized without going beyond what the UIKit stock components offer. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.