This document provides an overview of Objective-C, including: - Objective-C is a general purpose, object-oriented programming language that adds Smalltalk-style messaging to the C programming language. - Key features include properties (denoted by @property), protocols (denoted by @protocol), and the use of static variables and constants to implement design patterns like the singleton pattern. - Properties in Objective-C use accessor methods like getters and setters that are synthesized using @synthesize or defined dynamically using @dynamic to interface with an object's private instance variables.

1. Objective-C
a.k.a
@AknEp

2. • @AknEp /
• OB
• M1 ( )
• Obj-C 3 ^^

3. Why
•
•
• Public
•→ ○

4. @property
&
@synthesize

5. @property
• @synthesize
• @dynamic

6. @property
a = obj.value a = [obj value]
obj.value = a [obj setValue:a]

7. @synthesize
• getter & setter
• @synthesize myvalue; // Obj.m
• - (mytype) myvalue {
return myvalue; }
• - (void) setMyvalue: (mytyp) aMyvalue {
myvalue = aMyvalue; }

8. @property
& Tips
@synthesize
•
• set / get
•
• (‘A`)

9. @property ARC

10. @property ARC
• strong strong property
• weak weak property
•

11. •
• ex) NSString json
• #import

12. @protocol
• Java ” ”
• Delegate

13. @protocol
• // Hoge.h
@interface Hoge <MyProtocol>
• MyProtocol
• id <MyProtocol>
• NSObject <MyProtocol> *

14. •
•
• @interface Obj (Web) <MyDelegate>

15. •
• Singleton
•

16. C static
•
•
• static NSString * sharedString;
• const

17. • https://github.com/AknEp/MTL

18. • Objective-C 2.0
3 ( )