詳解Objective-C

iOSDC 2017でお話しする内容です

https://iosdc.jp/2017/node/1364

Objective-Cについて熱く語ります

Transcript

1. 
   
   
   
   
   Objective-C J04%$
   
   
 IUUQTJPTEDKQOPEF ৄղ
2. ࣗݾ঺հ ໊લ
   ኍ੉
   ༤େ
   ৬छ
   J04
   &OHJOFFS
 ໊͋ͩ
   4UBSޤ৯
   4XJGU
   ੡ͷϥΠϒϥϦΛ͍͔ͭ͘࡞ͬͯެ։ͯ͠·͢
 
 ελʔ͍ͩ͘͞ CBOO[BJ ZIJSPTF
3. ࠓ೔͓࿩͢͠Δ͜ͱɾ͍ͨ͜͠ͱ IUUQTJPTEDKQOPEF
4. ࠓ೔ͷλʔήοτ૚ IUUQTJPTEDKQOPEF
5. ࠓ೔ͷλʔήοτ૚ IUUQTJPTEDKQOPEF ओʹ4XJGUͰJ04։ൃ͍ͯ͠Δํ
6. ࠓ೔ͷλʔήοτ૚ IUUQTJPTEDKQOPEF 0CKFDUJWF$͕࿀͘͠ͳͬͯདྷͨํ
7. ࠓ೔ͷλʔήοτ૚ IUUQTJPTEDKQOPEF 0CKFDUJWF$ͷ͜ͱΛ͋·Γ஌Βͳ͍ํ޲͚
8. ࠓ೔ͷλʔήοτ૚ IUUQTJPTEDKQOPEF ΋ͪΖΜͦ͏͡Όͳ͍ํ΋ָ͠ΜͰ͍ͩ͘͞
9. ͲͪΒ͔ͱ͍͏ͱද໘తͳ͜ͱͷ͓࿩ IUUQTJPTEDKQOPEF جຊతͳػೳ͔ΒԠ༻·Ͱ
 ࣌ؒͷڐ͢ݶΓ͓఻͑͠·͢
10. ͜ͷൃදͷ0CKFDUJWF$ 
    J04։ൃͳͷͰ'PVOEBUJPOΛ࢖༻͢Δ͜ͱલఏͰ࿩͠·͢
    
    "3$
    /PU
    .3$
    
    1VSF
    0CKFDUJWF$
    /PU
    0CKFDUJWF$ 
    
    $ݴޠ΋ग़͖ͯ·͢
    
11. ຊ୊ 
    جຊ
    
    
    Ϋϥεͷએݴ
    
    
    
    
    ϝιου
    
    
    
    
    
    
    એݴ
    
    
    
    
    
    
    ࣮૷
    
    
    
    
    
    
    ݺͼग़͠
    
    
    #MPDLT
    
    
    .BDSP
    
    Ԡ༻
    - Type inference. - Method chain. - The strongest Objective-C I thought
12. Ϋϥεͷએݴ CustomClass.h @interface CustomClass : NSObject @end CustomClass.m #import “CustomClass.h" @implementation CustomClass @end
13. Ϋϥεͷએݴ CustomClass.h @interface CustomClass : NSObject // ͜͜ʹΠϯλʔϑΣʔε
    @end CustomClass.m #import “CustomClass.h" @implementation CustomClass // ͜͜ʹ࣮૷
    @end I ϔομʔϑΝΠϧ ͱ
    N ϝΠϯϑΝΠϧ Λ࡞Δ
    9DPEFͰΫϥεΛ࡞ΔͱͰ͖͍ͯ·͢
14. Ϋϥεͷએݴ CustomClass.h @interface CustomClass : NSObject // ͜͜ʹΠϯλʔϑΣʔε
    @end CustomClass.m #import “CustomClass.h" @implementation CustomClass // ͜͜ʹ࣮૷
    @end IϑΝΠϧ͸ΠϯλʔϑΣʔεΛఆٛ͢Δ ͨΊͷϑΝΠϧ
    IϑΝΠϧʹΫϥεΛએݴ͠ͳ͍ͱଞͷΫ ϥε͔Β͸ݟΔ͜ͱ͕Ͱ͖ͳ͍
15. $MBTTͷએݴ CustomClass.h @interface CustomClass : NSObject // ͜͜ʹΠϯλʔϑΣʔε
    @end CustomClass.m #import “CustomClass.h" @implementation CustomClass // ͜͜ʹ࣮૷
    @end ͍͍ͩͨ/40CKFDU΋͘͠͸ /40CKFDUΛܧঝ͍ͯ͠ΔΫϥεΛ ܧঝ͓͚ͯ͠͹0,
16. Ϋϥεͷએݴ CustomClass.h @interface CustomClass : NSObject // ͜͜ʹΠϯλʔϑΣʔε
    @end CustomClass.m #import “CustomClass.h" @implementation CustomClass // ͜͜ʹ࣮૷
    @end NʹIͰએݴͨ͠಺༰Λ࣮૷͍ͯ͘͠
17. CustomClass.h @interface CustomClass : NSObject // ͜͜ʹΠϯλʔϑΣʔε
    @end ϝιουͷએݴ
18. CustomClass.h @interface CustomClass : NSObject + (instancetype)method; - (void)method:(NSObject *)hoge; - (NSObject *)method:(NSObject *)hoge with:(NSObject *)fuga; @end ͜Μͳײ͡
19. CustomClass.h @interface CustomClass : NSObject + (instancetype)method; - (void)method:(NSObject *)hoge; - (NSObject *)method:(NSObject *)hoge with:(NSObject *)fuga; @end ϝιουͷએݴ ͕͜͜ฦΓ஋
20. CustomClass.h @interface CustomClass : NSObject + (instancetype)method; - (void)method:(NSObject *)hoge; - (NSObject *)method:(NSObject *)hoge with:(NSObject *)fuga; @end ϝιουͷએݴ ϝιουͷ໊લ
21. CustomClass.h @interface CustomClass : NSObject + (instancetype)method; - (void)method:(NSObject *)hoge; - (NSObject *)method:(NSObject *)hoge with:(NSObject *)fuga; @end ϝιουͷએݴ ୈೋҾ਺Ҏ߱ʹ͸-BCFM͕ͭ͘
22. CustomClass.h @interface CustomClass : NSObject + (instancetype)method; - (void)method:(NSObject *)hoge; - (NSObject *)method:(NSObject *)hoge with:(NSObject *)fuga; @end ϝιουͷએݴ A A
    ͕Ϋϥεϝιου
    4XJGUͩͱADMBTT
    GVODA
    AA
    ͕Πϯελϯεϝιου
    4XJGUͩͱ
    AGVODA
    
23. CustomClass.h @interface CustomClass : NSObject + (instancetype)method; - (void)method:(NSObject *)hoge; - (NSObject *)method:(NSObject *)hoge with:(NSObject *)fuga; @end ϝιουͷએݴ AJOTUBODFUZQFA͸ࣗ෼ͷ
 ΠϯελϯεͷܕΛද͢એݴ
 ܧঝઌͰ͜ͷϝιουΛ࢖ͭ৔߹
 ܧঝઌͷܕͱͯ͠ฦΔ
24. @interface CustomClass : NSObject + (instancetype)method; @end @interface CustomClass2 : CustomClass //- (instancetype)method; @end JOTUBODFUZQFʹ͍ͭͯ
25. @interface CustomClass : NSObject + (instancetype)method; @end @interface CustomClass2 : CustomClass //- (instancetype)method; @end JOTUBODFUZQF ͜ͷ৔߹ͷAJOTUBODFUZQFA͸ $VTUPN$MBTT
26. @interface CustomClass : NSObject + (instancetype)method; @end @interface CustomClass2 : CustomClass //- (instancetype)method; @end JOTUBODFUZQF ͜ͷ৔߹ͷAJOTUBODFUZQFA͸ $VTUPN$MBTT
27. CustomClass.m #import “CustomClass.h" @implementation CustomClass // ͜͜ʹ࣮૷
    @end ϝιουͷ࣮૷
28. CustomClass.m
 #import “CustomClass.h" @implementation CustomClass + (instancetype)method1 { CustomClass *custom = [[CustomClass alloc] init]; return custom; } - (void)method: (NSObject *)hoge { // do something... } @end ͜Μͳײ͡
29. CustomClass.m
 #import “CustomClass.h" @implementation CustomClass + (instancetype)method1 { CustomClass *custom = [[CustomClass alloc] init]; return custom; } - (void)method: (NSObject *)hoge { // do something... } @end ϝιουͷ࣮૷ IͰॻ͔Ε͍ͯΔ௨Γʹએݴ͠ɺ
 \
    ^
    είʔϓͷதͰϝιουͷ࣮૷
30. CustomClass.m
 #import “CustomClass.h" @implementation CustomClass + (instancetype)method1 { CustomClass *custom = [[CustomClass alloc] init]; return custom; } - (void)method: (NSObject *)hoge { // do something... } @end ϝιουͷ࣮૷ ϩʔΧϧม਺΍ASFUVSOAจͱ͔ࡉ͔͍͜ ͱʹ͍ͭͯ͸ׂѪ
31. @interface CustomClass : NSObject + (instancetype)method; @end @implementation CustomClass2 - (void)someMethod { CustomClass* object = [[CustomClass alloc] init]; [object method]; } @end ϝιουͷݺͼग़͠
32. @interface CustomClass : NSObject + (instancetype)method; @end @implementation CustomClass2 - (void)someMethod { CustomClass* object = [[CustomClass alloc] init]; [object method]; } @end $VTUPN$MBTT͔Β$VTUPN$MBTTΛ࢖͏ ҧ͏Ϋϥε
33. @interface CustomClass : NSObject + (instancetype)method; @end @implementation CustomClass2 - (void)someMethod { CustomClass* object = [[CustomClass alloc] init]; [object method]; } @end ϝιουͷݺͼग़͠ ͜ͷೋͭʹ஫໨
34. @interface CustomClass : NSObject - (instancetype)method; @end @implementation CustomClass2 - (void)someMethod { CustomClass* object = [[CustomClass alloc] init]; [object method]; } @end ϝιουͷݺͼग़͠ 0CKFDUJWF$ͷϝιουͷݺͼग़͠͸
 <A3FDFJWFSA
    NFUIPE>
    ͷܗʹͳΔ
35. @interface CustomClass : NSObject - (instancetype)method; @end @implementation CustomClass2 - (void)someMethod { CustomClass* object = [[CustomClass alloc] init]; [object method]; } @end ϝιουͷݺͼग़͠ ͜ͷ৔߹͸
 A3FDFJWFSAA$VTUPN$MBTTA
    ΫϥεʹϝιουΛૹ͍ͬͯΔͷͰ
 ͜Ε͸Ϋϥεϝιουͷݺͼग़͠
36. @interface CustomClass : NSObject - (instancetype)method; @end @implementation CustomClass2 - (void)someMethod { CustomClass* object = [[CustomClass alloc] init]; [object method]; } @end ϝιουͷݺͼग़͠ ͜ͷ৔߹͸
 A3FDFJWFSAAPCKFDUA
    $VTUPN$MBTTܕͷΠϯελϯεʹ
 ϝιουΛૹ͍ͬͯΔͷͰ
    Πϯελϯεϝιου
37. @interface CustomClass : NSObject - (instancetype)method; @end @implementation CustomClass2 - (void)someMethod { CustomClass* object = [[CustomClass alloc] init]; [[object method] method]; } @end ϝιουͷݺͼग़͠ ͪͳΈʹϝιουνΣΠϯΛ
 ͢Δͱ͜͏ͳΔ
38. @interface CustomClass : NSObject + (instancetype)method; @end @implementation CustomClass2 - (void)someMethod { CustomClass* object = [[CustomClass alloc] init]; [[[[object method] method] method]; } @end ϝιουͷݺͼग़͠ ʜ
39. ʜ
40. [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[ [[[[[[[[[[[[object method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] method] ; ϝιουνΣΠϯΛ͢Δͱ<>͕͍ͬͺ͍ʹ ͳΔ
41. ݟͨ໨͕
42. <>͚ͭ͗ͯ͢
43. Χοίѱ͍
44. ݴ͍͔͚ͨͬͨͩͰ͢
45. ຊ୊ 
    جຊ
    
    
    Ϋϥεͷએݴ
    
    
    
    
    ϝιου
    
    
    
    
    
    
    એݴ
    
    
    
    
    
    
    ࣮૷
    
    
    
    
    
    
    ݺͼग़͠
    
    
    #MPDLT
    
    
    .BDSP
    
    Ԡ༻
    - Type inference. - Method chain. - The strongest Objective-C I thought ࣍͜͜
46. #MPDLTͱ͸ 
    4XJGUͰ͍͏ͱ͜Ζͷ$MPTVSF ͬΆ͍΋ͷ
    
    
    $MPTVSFΑΓ΋ѻ͍ͮΒ͍
    
    
    ॻ͖ํ͕൥ࡶ
    
    
    ॻ͖ํΛ͍ͭ΋๨ΕΔ
    
    
    
    IUUQGVDLJOHCMPDLTZOUBYDPN
    هࡌͷ࢓ํ͸͔͜͜Β
    
47. #MPDLTͱ͸ 
    4XJGUͰ͍͏ͱ͜Ζͷ$MPTVSF ͬΆ͍΋ͷ
    
    
    $MPTVSFΑΓ΋ѻ͍ͮΒ͍
    
    
    ॻ͖ํ͕൥ࡶ
    
    
    ॻ͖ํΛ͍ͭ΋๨ΕΔ
    
    
    
    IUUQGVDLJOHCMPDLTZOUBYDPN
    هࡌͷ࢓ํ͸͔͜͜Β
    એݴ͢Δ৔ॴʹΑͬͯॻ͖ํ͕มΘΔ
    ৄ͍͠એݴͷ࢓ํ͸͔͜͜ΒΈ͍ͯͩ͘͞
48. ࠓճ͸ϓϩύςΟͷΈ঺հ 
    એݴ
 !JOUFSGBDF
    $VTUPN$MBTT
    
    /40CKFDU
    @property (nonatomic, copy) NSObject* (^blocks)(NSInteger); @end
49. ࠓճ͸ϓϩύςΟͷΈ঺հ 
    એݴ
 !JOUFSGBDF
    $VTUPN$MBTT
    
    /40CKFDU
    @property (nonatomic, copy) NSObject* (^blocks)(NSInteger); @end 0CKFDUJWF$ͷϓϩύςΟͷએݴ
50. ࠓճ͸ϓϩύςΟͷΈ঺հ 
    એݴ
 !JOUFSGBDF
    $VTUPN$MBTT
    
    /40CKFDU
    @property (nonatomic, copy) NSObject* (^blocks)(NSInteger); @end ͜͜ʹଐੑ
 ৄࡉ͸লུ
51. ࠓճ͸ϓϩύςΟͷΈ঺հ 
    એݴ
 !JOUFSGBDF
    $VTUPN$MBTT
    
    /40CKFDU
    @property (nonatomic, copy) NSObject* (^blocks)(NSInteger); @end $PQZΛ͚ͭΔඞཁ͕͋Δ
52. ࠓճ͸ϓϩύςΟͷΈ঺հ 
    એݴ
 !JOUFSGBDF
    $VTUPN$MBTT
    
    /40CKFDU
    @property (nonatomic, copy) NSObject* (^blocks)(NSInteger); @end ฦΓ஋ͷܕ
53. ࠓճ͸ϓϩύςΟͷΈ঺հ 
    એݴ
 !JOUFSGBDF
    $VTUPN$MBTT
    
    /40CKFDU
    @property (nonatomic, copy) NSObject* (^blocks)(NSInteger); @end #MPDLTͷ໊લ
    ϓϩύςΟͷ໊લ
54. ࠓճ͸ϓϩύςΟͷΈ঺հ 
    એݴ
 !JOUFSGBDF
    $VTUPN$MBTT
    
    /40CKFDU
    @property (nonatomic, copy) NSObject* (^blocks)(NSInteger); @end Ҿ਺ͷܕ
55. #MPDLTͰ͸ͳ͍৔߹ 
    એݴ
    !JOUFSGBDF
    $VTUPN$MBTT
    
    /40CKFDU
    !QSPQFSUZ
    OPOBUPNJD
    DPQZ
    /40CKFDU
    PCKFDU
    @end #MPDLTͰ͸ͳ͍৔߹͸͜Μͳײ͡
 ͜͜ʹอ࣋͢ΔܕͱϓϩύςΟ໊Λهࡌ
56. #MPDLTͷϓϩύςΟΛ࢖͏ 
    ࢖͏
    - (void)someMethod { self.blocks = ^NSObject* (NSInteger integer) { NSLog(@"log: %ld", integer); return [[NSObject alloc] init]; }; self.blocks(1); // log: 1 }
57. #MPDLTͷϓϩύςΟΛ࢖͏ 
    ࢖͏
    - (void)someMethod { self.blocks = ^NSObject* (NSInteger integer) { NSLog(@"log: %ld", integer); return [[NSObject alloc] init]; }; self.blocks(1); // log: 1 } ฦΓ஋
58. #MPDLTͷϓϩύςΟΛ࢖͏ 
    ࢖͏
    - (void)someMethod { self.blocks = ^NSObject* (NSInteger integer) { NSLog(@"log: %ld", integer); return [[NSObject alloc] init]; }; self.blocks(1); // log: 1 } Ҿ਺
59. #MPDLTͷϓϩύςΟΛ࢖͏ 
    ࢖͏
    - (void)someMethod { self.blocks = ^NSObject* (NSInteger integer) { NSLog(@"log: %ld", integer); return [[NSObject alloc] init]; }; self.blocks(1); // log: 1 } \
    ^
    ͷத਎͕࣮૷
60. #MPDLTͷϓϩύςΟΛ࢖͏ 
    ࢖͏
    - (void)someMethod { self.blocks = ^NSObject* (NSInteger integer) { NSLog(@"log: %ld", integer); return [[NSObject alloc] init]; }; self.blocks(1); // log: 1 } ࣮ߦ͢Δͱ͖
61. 4FMGΛΩϟϓνϟ͍ͨ͠ͱ͖ 
    ࢖͏
    - (void)someMethod { self.blocks = ^NSObject* (NSInteger integer) { NSLog(@"log: %@", self); return [[NSObject alloc] init]; }; }
62. 4FMGΛΩϟϓνϟ͍ͨ͠ͱ͖ 
    ࢖͏
    - (void)someMethod { self.blocks = ^NSObject* (NSInteger integer) { NSLog(@"log: %@", self); return [[NSObject alloc] init]; }; } TFMG
    ΛΩϟϓνϟ͢Δͱ
 ॥؀ࢀর͕ى͖ͯ͠·͏
63. ऑࢀরΛ࢖͏ 
    ࢖͏
    - (void)someMethod { __weak CustomClass *weakSelf = self; self.blocks = ^NSObject* (NSInteger integer) { NSLog(@"log: %@", weakSelf); return [[NSObject alloc] init]; }; }
64. ऑࢀরΛ࢖͏ 
    ࢖͏
    - (void)someMethod { __weak CustomClass *weakSelf = self; self.blocks = ^NSObject* (NSInteger integer) { NSLog(@"log: %@", weakSelf); return [[NSObject alloc] init]; }; } XFBLͷ
    TFMG
    ͷࢀরΛ࣋ͭ
65. ऑࢀরΛ࢖͏ 
    ࢖͏
    - (void)someMethod { __weak CustomClass *weakSelf = self; self.blocks = ^NSObject* (NSInteger integer) { NSLog(@"log: %@", weakSelf); return [[NSObject alloc] init]; }; } CMPDLTͷதͰ͸XFBL4FMGΛ࢖͏
66. ॥؀ࢀর͕ى͖Δ৔߹͸ؾΛ͚ͭΑ͏
67. ຊ୊ 
    جຊ
    
    
    Ϋϥεͷએݴ
    
    
    
    
    ϝιου
    
    
    
    
    
    
    એݴ
    
    
    
    
    
    
    ࣮૷
    
    
    
    
    
    
    ݺͼग़͠
    
    
    #MPDLT
    
    
    .BDSP
    
    Ԡ༻
    - Type inference. - Method chain. - The strongest Objective-C I thought ࣍͜͜
68. .BDSPͱ͸ ϓϩάϥϜதͷจࣈྻΛ͋Β͔͡Ίఆٛͨ͠نଇʹ͕ͨͬͯ͠ஔ׵ ͢Δػೳͷ͜ͱΛ͍͍·͢
    Š
    Ҿ༻
    $ݴޠͷϚΫϩͷجຊʹ͍ͭͯ
    IUUQXXXDMBOHPSHEFUBJMNBDSP@CBTJDIUNM
    
    
69. .BDSPͱ͸ ϓϩάϥϜதͷจࣈྻΛ͋Β͔͡Ίఆٛͨ͠نଇʹ͕ͨͬͯ͠ஔ׵ ͢Δػೳͷ͜ͱΛ͍͍·͢
    Š
    Ҿ༻
    $ݴޠͷϚΫϩͷجຊʹ͍ͭͯ
    IUUQXXXDMBOHPSHEFUBJMNBDSP@CBTJDIUNM
    
    ͜Ε͚ͩݴΘΕͯ΋Θ͔Βͳ͍ͱࢥ͏ͷͰ ࢖ͬͯΈ·͠ΐ͏
70. .BDSPͱ͸ ϓϩάϥϜதͷจࣈྻΛ͋Β͔͡Ίఆٛͨ͠نଇʹ͕ͨͬͯ͠ஔ׵ ͢Δػೳͷ͜ͱΛ͍͍·͢
    Š
    Ҿ༻
    $ݴޠͷϚΫϩͷجຊʹ͍ͭͯ
    IUUQXXXDMBOHPSHEFUBJMNBDSP@CBTJDIUNM
    
    ·͔ͣ͜͜Β
    نଇͷఆٛΛ͢Δ
71. نଇΛఆٛ͢Δ #define Log NSLog(@"ίίϮτΦολϤʔ") ఆٛεϧϤʔએݴ
72. نଇΛఆٛ͢Δ #define Log NSLog(@"ίίϮτΦολϤʔ") ͜ͷఆٛͷ໊લ
73. .BDSPͱ͸ ϓϩάϥϜதͷจࣈྻΛ͋Β͔͡Ίఆٛͨ͠نଇʹ͕ͨͬͯ͠ஔ׵ ͢Δػೳͷ͜ͱΛ͍͍·͢
    Š
    Ҿ༻
    $ݴޠͷϚΫϩͷجຊʹ͍ͭͯ
    IUUQXXXDMBOHPSHEFUBJMNBDSP@CBTJDIUNM
    
    ࣍͜͜Λ֬ೝ
74. نଇΛఆٛ͢Δ #define Log NSLog(@"ίίϮτΦολϤʔ") ஔ׵͢Δ಺༰
75. ஔ׵͢Δ಺༰ #define Log NSLog(@"ίίϮτΦολϤʔ") -PHͱϓϩάϥϜதʹॻ͘ͱ
 /4-PH !lίίϮτΦολϤʔ
    ʹஔ׵͞ΕΔ
76. ͭ·Γ͜͏ͳΔ #define Log NSLog(@"ίίϮτΦολϤʔ") - (void)someMethod { Log; }
77. ͭ·Γ͜͏ͳΔ #define Log NSLog(@"ίίϮτΦολϤʔ") - (void)someMethod { Log; // ίίϮτΦολϤʔ } ͕͜͜
 /4-PH !lίίϮτΦολϤʔ
    ஔ׵͞ΕΔ
78. .BDSPʹ͍ͭͯ ଞʹ΋Ҿ਺ΛऔΔ͜ͱ͕Ͱ͖ͨΓ
    ఆ਺ͱͯ͠એݴ͢ΔΑ͏ͳ࢖͍ํͩͬͨΓ
    τʔΫϯͱݺ͹ΕΔػೳͩͬͨΓ͕͋ΔͷͰ
    ௐ΂ͯΈΔͱ໘ന͍Ͱ͢
    ඇৗʹڧྗͰ͕͢࢖͍͗͢ʹ͸͝஫ҙ
    
79. ຊ୊ 
    جຊ
    
    
    Ϋϥεͷએݴ
    
    
    
    
    ϝιου
    
    
    
    
    
    
    એݴ
    
    
    
    
    
    
    ࣮૷
    
    
    
    
    
    
    ݺͼग़͠
    
    
    #MPDLT
    
    
    .BDSP
    
    Ԡ༻
    - Type inference. - Method chain. - The strongest Objective-C I thought ͔͜͜Β͕ຊ౰ʹ࿩͔ͨͬͨ͠಺༰ͩ͊ʂ
80. 5ZQF
    JOGFSFODF
81. 5ZQF
    JOGFSFODF ܕਪ࿦
82. 0CKFDUJWF$ͷܕ 0CKFDUJWF$͸ϓϩάϥϜதʹܕΛهड़͢Δ͜ͱ͕Ͱ͖·͕͢ɺ࣮ ࡍ͸3VOUJNFͰܕ͕ܾ·Δಈతܕ෇͚ݴޠͰ͢ɻ
    ϓϩάϥϜதʹܕΛએݴ͢Δ͜ͱͰ*%&ͷิ׬͕ޮ͖΍͍͢ͱݴͬ ͨར఺͕͋Γ·͢ɻ
    ࣮ࡍʹ͸ಈతܕ෇͚Ͱ͋Δ͜ͱʹ͸มΘΒͳ͍ͷͰ͕͢ɺ*%&͕ղ ऍ͢ΔܕΛਪ࿦ͤ͞Δ͜ͱ͕Ͱ͖·͢ɻ
    ͦ͏ɺ@@BVUP@UZQF
    ͳΒͶ
83. @@BVUP@UZQF - (void)someMethod { __auto_type string = @"hogehoge"; string.length; }
84. @@BVUP@UZQF - (void)someMethod { __auto_type string = @"hogehoge"; string.length; } ීஈܕΛએݴ͢Δ৔ॴʹ
 @@BVUP@UZQF
85. @@BVUP@UZQF - (void)someMethod { __auto_type string = @"hogehoge"; string.length; } /44USJOHͷMFOHUI
 ϓϩύςΟʹΞΫηεͰ͖Δ
    ͭ·Γܕਪ࿦Λͯ͘͠ΕΔ
86. @@BVUP@UZQF - (void)someMethod { __auto_type string = @"hogehoge"; string.length; } ѹ౗తਪ࿦
87. .FUIPE
    DIBJO
88. .FUIPE
    DIBJO
    MJLF
    4XJGU
89. 4XJGU
    ͬΆ͘
    .FUIPE
    DIBJO
90. 4XJGU
    ͬΆ͘
    .FUIPE
    DIBJO ͑ʁ0CKFDUJWF$ͬͯ͋ͷϝιουݺͼग़͢ͱ͖ʹ
    <
    >͚ͭ͗ͯ͢Χοί ѱ͍ݴޠͰ͠ΐʁ
    ͦ͏ࢥͬͨͦ͜ͷ͋ͳͨਖ਼ղͰ͢ɻ
    ࢒೦ͳ͕Βϝιουݺͼग़͠͸
    <
    >
    ͚ͭΔͷ͕0CKFDUJWF$
    ͜͜Ͱ͸ࠓ·Ͱಘͨ஌ࣝͷதͰ
    <
    >
    ͚ͭͣʹॲཧΛॻ͍͍͖ͯ
    ͞ΒʹͦΕΛͭͳ͍Ͱ͍͖·͢ɻ
91. ๨Εͨਓ͸ޙͰεϥΠυݟ௚ͯ͠Ͷ @interface CustomClass : NSObject @property (nonatomic, copy) CustomClass* (^method)(); @property (nonatomic, copy) CustomClass* (^chain)(); @end ฦΓ஋͖ͭCMPDLTͷϓϩύςΟΛએݴ͢Δ
92. ࢖͍ํ - (void)someMethod { self.chain(); }
93. ࢖͍ํ - (void)someMethod { self.method(); } ॲཧΛ໊લ
    
    Ͱݺͼग़ͤΔ
94. ϝιουνΣΠϯ self.method().chain().chain().chain().chain().chain().chain( ).chain().chain().chain().chain().chain().chain().chain().ch ain().chain().chain().chain().chain().chain().chain().chain( ).chain().chain().chain().chain().chain().chain().chain().ch ain().chain().chain().chain().chain();
95. 
    ͚ͭ͗ͯ͢΋
96. ͔͍͍ͬ͜
97. ࣍ߦ͖·͠ΐ͏
98. The strongest Objective-C I thought
99. ๻ͷ͔Μ͕͑ͨ࠷ڧͷObjective-C
100. #define let __auto_type const #define var __auto_type #define dump(count) NSLog(@“count: %ld”, count) #define print() NSLog(@"ίίϮτΦολϤʔ") NSArray* Array() { return @[]; } - (instancetype)init { self = [super init]; if (self) { self.method = ^{ print(); }; } return self; } - (void)someMethod { let array = Array(); var array2 = Array(); array2 = @[@"hoge", @"fuga"]; // array = @[@"hoge", @"fuga"]; ίϯύΠϧΤϥʔ self.method(); dump(array.count); dump(array2.count); }
101. #define let __auto_type const #define var __auto_type #define dump(count) NSLog(@“count: %ld”, count) #define print() NSLog(@"ίίϮτΦολϤʔ") NSArray* Array() { return @[]; } - (instancetype)init { self = [super init]; if (self) { self.method = ^{ print(); }; } return self; } - (void)someMethod { let array = Array(); var array2 = Array(); array2 = @[@"hoge", @"fuga"]; // array = @[@"hoge", @"fuga"]; ίϯύΠϧΤϥʔ self.method(); dump(array.count); dump(array2.count); } ๻ͷ͔Μ͕͑ͨ࠷ڧͷ0CKFDUJWF$
102. #define let __auto_type const #define var __auto_type #define dump(count) NSLog(@“count: %ld”, count) #define print() NSLog(@"ίίϮτΦολϤʔ") NSArray* Array() { return @[]; } - (instancetype)init { self = [super init]; if (self) { self.method = ^{ print(); }; } return self; } - (void)someMethod { let array = Array(); var array2 = Array(); array2 = @[@"hoge", @"fuga"]; // array = @[@"hoge", @"fuga"]; ίϯύΠϧΤϥʔ self.method(); dump(array.count); dump(array2.count); } ࣮ߦ݁Ռ ίίϮτΦολϤʔ count: 0 count: 2
103. #define let __auto_type const #define var __auto_type #define dump(count) NSLog(@“count: %ld”, count) #define print() NSLog(@"ίίϮτΦολϤʔ") NSArray* Array() { return @[]; } - (instancetype)init { self = [super init]; if (self) { self.method = ^{ print(); }; } return self; } - (void)someMethod { let array = Array(); var array2 = Array(); array2 = @[@"hoge", @"fuga"]; // array = @[@"hoge", @"fuga"]; ίϯύΠϧΤϥʔ self.method(); dump(array.count); dump(array2.count); } ܕਪ࿦͕Ͱ͖Δʂ
 MFU
     Ͱఆ਺Λ؆୯ʹએݴʂ
104. #define let __auto_type const #define var __auto_type #define dump(count) NSLog(@“count: %ld", count) #define print() NSLog(@"ίίϮτΦολϤʔ") NSArray* Array() { return @[]; } - (instancetype)init { self = [super init]; if (self) { self.method = ^{ print(); }; } return self; } - (void)someMethod { let array = Array(); var array2 = Array(); array2 = @[@"hoge", @"fuga"]; // array = @[@"hoge", @"fuga"]; ίϯύΠϧΤϥʔ self.method(); dump(array.count); dump(array2.count); } ΋ͬͱ؆୯ʹϩάΛు͘Α͏ʹʂ
 ϚΫϩ͸෼ذॲཧ΋͔͚ΔͷͰ
 ඞཁ͕͋Ε͹֦ு
105. #define let __auto_type const #define var __auto_type #define dump(count) NSLog(@“count: %ld”, count) #define print() NSLog(@"ίίϮτΦολϤʔ") NSArray* Array() { return @[]; } - (instancetype)init { self = [super init]; if (self) { self.method = ^{ print(); }; } return self; } - (void)someMethod { let array = Array(); var array2 = Array(); array2 = @[@"hoge", @"fuga"]; // array = @[@"hoge", @"fuga"]; ίϯύΠϧΤϥʔ self.method(); dump(array.count); dump(array2.count); } $ݴޠͷTZOUBYΛ࢖ͬͯ
     ؾܰʹJOJUJBMJ[FSΛ࢖͑ΔΑ͏ʹʂ
     ͦͯ͠ɺ/4ϓϨϑΟοΫε΋ͱΔʂ
106. ૉఢͰ͠ΐʁ
107. Ͳ͔͜ͰΈͨ͜ͱ͋Δʁ
109. ൃදͷ·ͱΊ ๻ͷ͔Μ͕͑ͨ࠷ڧͷ0CKFDUJWF$͸ͱͯ΋ૉ੖Β͍͠΋ͷ͕ग़དྷ্͕Γ· ͨ͠ɻ
     ͔͠͠ɺνʔϜͰͷ։ൃͩͱ΍͸ΓࠞཚΛট͘Մೳੑ͕େ͖͍ͷͰ࢖༻͸΍ Ί·͠ΐ͏ɻ
     ͪͳΈʹʮ๻ͷ͔Μ͕͑ͨ࠷ڧͷ0CKFDUJWF$ʯʹࣅͨ4XJGUͱ͍͏ݴޠͰ ࡞ͬͨϥΠϒϥϦΛ͍͔ͭ͘ެ։͍ͯ͠ΔͷͰɺΈͳ͞Μ
     શͯͷϦϙδτϦʹελʔ͍ͩ͘͞
     IUUQTHJUIVCDPNCBOO[BJ
     
110. ͓͠·͍
     a ?P?