Escaping Closures in Swift - 公司內分享會

Transcript

1. &TDBQJOH
   $MPTVSFT 
   ꤫խ愴蠩 @escaping

2. 䖰ㆭ酭鷗鷗⿡ㆭ酭

3. 殹
   DMPTVSF
   ⡲捀⿮侸⫄Ⰵ♧⦐
   NFUIPE
   儘
   鸏⦐
   DMPTVSF
   剚㖈
   NFUIPE
   㛂遤㸤䧭䖕
   
   䩞剚鄄㛂遤儘㽠䗳갭䭸㹁䧭
   FTDBQJOH
   DMPTVSF

4. ⾲㨥䞕㞯 雊䧮⦛⢵䢩䢩⸈匌銯

5. class A { func someMethod(closure: () -> Void) { closure()

   } } 鸏♧媯♶剚剤
   DPNQJMFS
   FSSPS

6. 䞕㞯♧ 鸏⦐
   DMBTT
   剤⦐荈㹁纏涸
   RVFVF
   ⢵嶋⻋♶ず
   NFUIPE
   ⫄Ⰵ涸
   DMPTVSFT

7. class A { var closures: [() -> Void]? = []

   func someMethod(closure: () -> Void) { self.closures?.append(closure) } } 㖈
   4XJGU
   
   ⴀ⢵⟃⵹鸏媯♶剚剤㉏겗

8. class A { var closures: [() -> Void]? = []

   func someMethod(closure: () -> Void) { self.closures?.append(closure) } }
9. None

10. class A { var closures: [() -> Void]? = []

    func someMethod(closure: @escaping () -> Void) { self.closures?.append(closure) } }

11. 㼭穡 • @escaping ˖ ⫄Ⰵ
    NFUIPE
    涸
    DMPTVSF
    㥶卓銴㖈
    NFUIPE GVODUJPO
    涸
    SFUVSO
    䖕䩞㛂遤㽠䗳갭銴⸈♳
    @escaping ˖ @noescape
    JNQMJDJUMZ
    ˖

    DMPTVSF
    ⡲捀⿮侸갸鏤鿪僽
    @noescape

12. 䞕㞯✳ 䧮欽痧♲倰
    MJCSBSZ
    涸
    NFUIPE
    FH
    "MBNPSF

13. 〫銴➮剤
    FTDBQJOH
    ⡹㽠銴騈衽
    !FTDBQJOH

14. class B { var closures: [() -> Void]? = []

    func anotherMethod(closure: @escaping () -> Void) { self.closures?.append(closure) } }

15. class A { func someMethod(closure: () -> Void) { B().anotherMethod(closure:

    closure) } } class B { var closures: [() -> Void]? = [] func anotherMethod(closure: @escaping () -> Void) { self.closures?.append(closure) } } 㖈
    4XJGU
    
    ⴀ⢵⟃⵹鸏垺㻨♶剚剤㉏겗

16. class A { func someMethod(closure: () -> Void) { B().anotherMethod(closure:

    closure) } } class B { var closures: [() -> Void]? = [] func anotherMethod(closure: @escaping () -> Void) { self.closures?.append(closure) } }
17. None

18. class A { func someMethod(closure: @escaping () -> Void) {

    B().anotherMethod(closure: closure) } } class B { var closures: [() -> Void]? = [] func anotherMethod(closure: @escaping () -> Void) { self.closures?.append(closure) } }

19. 籏穡♧♴

20. 䖰ㆭ酭鷗鷗⿡ㆭ酭

21. 鷗ⴀ㛂遤涸眕㕠

22. Ⱖ➮ ˖ 〳⟃鍑对
    SFUBJO
    DZDMF
    涸㉏겗
    4&
    䖊㻜뀿
    ˖ OPFTDBQF
    DMPTVSFT
    IBWF
    BMTP
    BMXBZT
    CFFO
    UIF
    QSFGFSSFE
    EFGBVMU

    
    TJODF
    UIFZ
    FMJNJOBUF
    B
    DMBTT
    PG
    SFUBJO
    DZDMF
    JTTVFT
    ˖ QSPUPDPM
    涸㹁纏
    ˖ 㥶卓㻜⡲
    QSPUPDPM
    涸倰岁儘꨾銴⸈
    !FTDBQJOH
    QSPUPDPM
    ⚥鑪倰岁涸㹁纏⛳銴⸈♳

23. 5IBOL
    :PV