Objective C

Intro

1. History
2. Language Comparison
3. Language Comparison (2)
4. Types / Typing
5. Classes (intro)
6. Messages
7. Selectors


8. Classes
1. Inheritance
2. Protocols
3. Categories
9. Forwarding
10. NSObject
11. Code Conventions

References

Objective C - Code Conventions

• Protocols and interface definitions go in .h files (@protocol ... @end and @interface ... @end)
• Implementations (@implementation ... @end) go in .m files
• Factory method pattern - e.g., a Cartesian Point class might have the following methods:
  • +point - returns a new point initialized to (0,0)
  • +pointX:Y: - returns a new point initialized to (X,Y)
  • -init - initializes a point to (0,0)
  • -initX:Y: - initializes a point to (X,Y)