2011/3/3 mixi engineers seminar発表資料。

1. Objective-C
2011 / 3 / 3
Kenji Kinukawa

2. => k.kinukawa, k_kinukawa
2010 11
=>
2009
=> Trangram

5. Apple
Apple

6. =>Objective-C
Objective-C

7. Objective-C

8. Objective-C

9. 1983 , Stepstone
1985 NeXT Computer
1995 Next Stepstone Obj-C
1997 Apple Next Jobs
Mac OS X
2007 iPhone Obj-C
-wikipedia

10. iOS Cocoa Touch
iOS
Cocoa
UIKit Touch
&
Foundation
Core OS &

11. Objective-C
■
■C
■SmallTalk

12. ■
■for, while, if, switch, C
■
■iOS GC
malloc free

13. ■

14. ■
MyUtil.h
@interface MyUtil{
...
}
...
@end
MyUtil.m
@implementation MyUtil
...
@end

15. ■
MyUtil.h
@interface MyUtil{
int hoge;
}
-(int)sumAB:(int)a adder:(int)b;
-(int)diffAB:(int)a differ:(int)b;
@end

16. ■
MyUtil.m
@implementation MyUtil
-(int)sumAB:(int)a adder:(int)b
{
return a+b;
}
-(int)diffAB:(int)a differ:(int)b
{
return a-b;
}
@end

17. ■
-(double)evaluation:(int)val
{
hoge;
huga;
return buzz;
}

18. ■id
id
id
id obj;
[obj msg];

19. ■
NSString * obj;
[obj hogehuga];
warning: 'NSString' may not respond to '-hogehuga'
NSString -hogehuga

20. ■
* hoge =
[[ alloc] init];

21. ■
[obj msg];

22. SICP
(define (fact n)
(if (= n 1)
1
(* (fact (- n 1)) n)))
(define (fact2 n)
(define (in-fact n ans)
(if (= n 1)
ans
(in-fact (- n 1) (* ans n))))
(in-fact n 1))
(define (fact3 n)
(define (fact2-iter n ans)
(if (= n 0)
ans
(fact2-iter (- n 1) (* n ans))))
(fact2-iter n 1))
(print (fact3 12000))

23. ■
[obj getHoge];

24. Obj-C

25. ■
※
-(double)evaluation:(int)val;
evaluation:
-(double)evaluation:(int)val max:(int)a;
evaluation:max:

26. ■SEL
SEL
SEL
[obj callHoge];
SEL action = @selector(callHoge);
[obj performSelector:action];

27. ■IMP
Obj-C C
IMP
IMP funcp = [foo methodForSelector:
@selector(callHoge)];
xyz =
(*funcp)(foo, @selector(callHoge),nil,nil);

28. ■
Mac Objective-C2.0 GC
[obj retain];
[obj release];

29. ■
interface
@protocol MGVoiceClientDelegate<NSObject>
-(void)mgVoiceClient:(NSURLConnection *)conn didReceiveResponseError:(NSString *)error;
-(void)mgVoiceClient:(NSURLConnection *)conn didFailWithError:(NSError*)error;
-(void)mgVoiceClient:(NSURLConnection *)conn didFinishGetting:(NSArray *)voices;
-(void)mgVoiceClient:(NSURLConnection *)conn didFinishPosting:(id)reply;
@end
@interface VoiceTableViewController : UITableViewController <MGVoiceClientDelegate>{
MGVoiceClient * voiceClient;
NSArray * voiceArray;
}

30. ■
Not
NSString+Parse.h
@interface NSString (Parse)
-(NSDictionary)parseJson:(NSString *)str;
-(NSDictionary)parseXml:(NSString *)str;
-(NSDictionary)parseYaml:(NSString *)str;
@end
[str parseJson:jsonStr];
NSString Parse

31. ■
NSString+Parse.h
@interface NSString (Parse)
-(NSDictionary)parseJson:(NSString *)str;
-(NSDictionary)parseXml:(NSString *)str;
-(NSDictionary)parseYaml:(NSString *)str;
@end
[str parseJson:jsonStr];
NSString Parse

32. ■
Cocoa
A B
method A
method B

33. ■
A B
method A
Obj-C

34. ■
A B
method A method A
delegate
B
Obj-C

35. ■
@protocol MGVoiceDelegate;
@interface MGVoice : NSObject{
@public
id <MGVoiceDelegate> delegate;
}
@end
-(void)mgCommentClient:(NSURLConnection *)conn didFinishGetting:(NSArray *)commentArray{
if([delegate respondsToSelector:@selector(mgVoice:didFinishGettingComments:)]){
[delegate mgVoice:conn didFinishGettingComments:commentArray];
}
}
- (void)viewDidLoad {
[super viewDidLoad];
voice.delegate = self;
}
-(void)mgVoice:(NSURLConnection *)conn didFinishGettingComments:(NSArray *)commentArray{
if([commentArray count]>0){
MGComment * comment = [commentArray objectAtIndex:0];
commentText.text = comment.commentText;
}else{
commentText.text = @" ";
}
}

36. ■Blocks
Apple C ISO
LLVM iOS4.0
LLVM Compiler 2.0
LLVM
LLVM 2.0
C Objective-C C++
LLVM GCC 2
Xcode 4 LLVM IDE
LLVM
Xcode IDE C C++ Objective-C
block lambda

37. ■Blocks
void (^b)() = ^{
printf("im in blockn");
};
b();

38. ■Blocks
void (^b)() = ^{
printf("im in blockn");
};
b();
C
Block
Block_copy(),Block_release()

39. iOS4 Blocks
ex)
GCD( )

40. ■
Objective-C

41. ■
mixi graph API
mixi graph API iPhone
※