FingerPainter
Level 3, Six Lessons
Lead students in reaching a fundamental understanding of Core Graphics. Illustrate the building blocks of drawing with Core Graphics contexts and functions. Facilitate the development of a touch-based drawing strategy, and teach students how to respond to touch events.
The Finished App
Familiarize yourself with the project, and demonstrate the app students will build.
Lesson 1
Introduce drawing with Core Graphics functions to render a custom UIView object, to illustrate object-oriented inheritance.
Lesson 2
Facilitate the development of a touch-based drawing strategy by overriding UIResponder event handlers to respond to touch events.
Lesson 3
Teach students how to capture the coordinates of touches, while exploring Swift sets and placeholder types.
Lesson 4
Facilitate an understanding of the drawing strategy by inspecting event handlers and coordinates for drawing. Demonstrate using optionals, optional binding, and external parameter names.
Lesson 5
Demonstrate using a UIImageView object and Core Graphics to implement a dynamic, user-generated drawing.
Lesson 6
Facilitate the practice of implementing button behavior with a controller action to clear the UIImageView.
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