SwiftFriendlyObjective-C/try! Swift Tokyo 2017 RejectCon

https://rmp-quipper.connpass.com/event/49316/

Transcript

1. SwiftϑϨϯυϦʔObjective-C
   @nolili
   Noritaka Kamiya
   

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6. Swift❤
   Objective-C❤
   

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7. try! Swift
   SwiftϑϨϯυϦʔObjective-C
   

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8. try! Swift
   EXC_BAD_INSTRUCTION
   

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9. try! Swift
   EXC_BAD_INSTRUCTION
   Rejected
   

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10. Swift❤
    Objective-C❤
    

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11. جຊ
    

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12. Nullability
    

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13. @interface Memo : NSObject
    @property (nonatomic) NSDate *createdAt;
    @property (nonatomic) NSString *text;
    @property (nonatomic) NSArray *images;
    @end
    Nullability
    

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14. Nullability
    open class Memo : NSObject {
    open var createdAt: Date!
    open var text: String!
    open var images: [Any]!
    }
    

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15. @interface Memo : NSObject
    @property (nonatomic, nonnull) NSDate *createdAt;
    @property (nonatomic, nonnull) NSString *text;
    @property (nonatomic, nonnull) NSArray *images;
    @end
    Nullability
    

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16. open class Memo : NSObject {
    open var createdAt: Date
    open var text: String
    open var images: [Any]
    }
    Nullability
    

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17. NS_ASSUME_NONNULL_BEGIN
    @interface Memo : NSObject
    @property (nonatomic) NSDate *createdAt;
    @property (nonatomic) NSString *text;
    @property (nonatomic) NSArray *images;
    @end
    NS_ASSUME_NONNULL_END
    Nullability
    

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18. LightWeight Generics
    

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19. LightWeight Generics
    NS_ASSUME_NONNULL_BEGIN
    @interface Memo : NSObject
    @property (nonatomic) NSDate *createdAt;
    @property (nonatomic) NSString *text;
    @property (nonatomic) NSArray *images;
    @end
    NS_ASSUME_NONNULL_END
    

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20. open class Memo : NSObject {
    open var createdAt: Date
    open var text: String
    open var images: [Any]
    }
    Nullability
    

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21. LightWeight Generics
    NS_ASSUME_NONNULL_BEGIN
    @interface Memo : NSObject
    @property (nonatomic) NSDate *createdAt;
    @property (nonatomic) NSString *text;
    @property (nonatomic) NSArray *images;
    @end
    NS_ASSUME_NONNULL_END
    

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22. LightWeight Generics
    open class Memo : NSObject {
    open var createdAt: Date
    open var text: String
    open var images: [UIImage]
    }
    

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23. ΞϊςʔγϣϯͰSwiftଆ΁ؾ࣋ͪΛද໌͢Δ
    

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24. Blocks / Closure
    

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25. memo.save { _ in }
    TrailingClosure
    typedef void (^SomeCompletionHandler)(NSString *);
    @interface Memo : NSObject
    - (void)save:(SomeCompletionHandler)handler;
    @end
    

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26. Closure
    typedef void (^SomeCompletionHandler)(NSString *);
    @interface Memo : NSObject
    - (void)save:(nullable SomeCompletionHandler)handler;
    @end
    memo.save()
    

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27. noescape
    typedef void (^SomeCompletionHandler)(NSString *);
    @interface Notes : NSObject
    + (void)save:(__attribute__((noescape)) SomeCompletionHandler)handler;
    @end
    memo.save { _ in
    someSelfMethod() // self. ෆཁ
    }
    

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28. Error/Exception
    

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29. Error
    + (BOOL)send:(NSError **)error;
    open class func send() throws
    

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30. @throw
    @try
    @catch
    @finally
    

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31. @throw
    @try
    @catch
    @finally
    X
    

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32. w $PEJOH(VJEFMJOFTGPS$PDPBʹԊͬͯॻ͘
    w (FOFSBUFE*OUFSGBDFΛΈΔ
    w 4UBUJD"OBMZ[FSΛ׆༻͢Δ
    w 4XJGU͔ΒJNQPSUͯ͠ΈΔ
    w ͔͍͍ͬ͜0CKFDUJWF$͸4XJGU͔ΒΈͯ΋͔͍͍ͬ͜
    ৺͕͚͍ͯΔ͜ͱ
    

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37. w $PDPBίʔσΟϯάΨΠυϥΠϯʹԊͬͯॻ͘
    w (FOFSBUFE*OUFSGBDFΛΈΔ
    w 4UBUJD"OBMZ[FSΛ׆༻͢Δ
    w 4XJGU͔ΒJNQPSUͯ͠ΈΔ
    w ͔͍͍ͬ͜0CKFDUJWF$͸4XJGU͔ΒΈͯ΋͔͍͍ͬ͜
    ৺͕͚͍ͯΔ͜ͱ
    

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38. SwiftϑϨϯυϦʔObjective-C
    @nolili
    Noritaka Kamiya
    

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