CoreGraphics

Question 1

Core Graphics

Answer 1

The Core Graphics framework is based on the power of Quartz advanced drawing engine. It provides low-level, lightweight 2D rendering. The uses of this framework are to handle path-based drawing, transformations, color management, offscreen rendering, patterns, gradients and shadings, image data management, image creation, and image masking. In addition, it can also used as PDF document creation, parsing, and display.

Question 2

UIGraphicsRenderer

Answer 2

UIGraphicsRenderer an abstract base class for creating graphics renderers. You cannot use use this class directly, so use his subclasses or make your own subclasses. The Core Graphics framework provides 2 subclasses: UIGraphicsImageRenderer and UIGraphicsPDFRenderer.

Question 3

UIGraphicsImageRenderer

Answer 3

A graphics renderer for creating images with Core Graphics.

The UIGraphicsImageRenderer class helps you to accomplish drawing tasks.