Swift 5.1 - Property Wrapper

Swift 5.1で追加された機能Part.2
Property Wrapperについて

ソースコードとメモ書き
https://github.com/matsuda/MaterialAndMemo/tree/master/Swift_5_1

Transcript

1. 4XJGU7FS
   
   ,PTVLF.BUTVEB
   

   View Slide

2. w %FGBVMU"SHVNFOUT*O&OVN$BTFT
   w 4ZOUIFTJ[FEFGBVMUWBMVFTGPSUIFNFNCFSXJTFJOJUJBMJ[FS
   w *NQMJDJUSFUVSOTGSPNTJOHMFFYQSFTTJPOGVODUJPOT
   w 8BSOJOHTGPSBNCJHVPVTOPOFDBTFT
   w .BUDIJOHPQUJPOBMFOVNTBHBJOTUOPOPQUJPOBMT
   w &YQBOEJOH4XJGU4FMGUPDMBTTNFNCFSTBOEWBMVFUZQFT
   w 0QBRVF3FTVMU5ZQFT
   w 4UBUJDBOEDMBTTTVCTDSJQUT
   w 0SEFSFE$PMMFDUJPO%J⒏OH
   w ,FZ1BUI.FNCFS-PPLVQ
   w 1SPQFSUZ8SBQQFST
   w
   

   View Slide

3. "QSPQFSUZXSBQQFSUZQFJTBUZQFUIBUDBOCFVTFEBTBQSPQFSUZXSBQQFS
   5IFSFBSFUXPCBTJDSFRVJSFNFOUTGPSBQSPQFSUZXSBQQFSUZQF
   5IFQSPQFSUZXSBQQFSUZQFNVTUCFEFpOFEXJUIUIFBUUSJCVUF
   !QSPQFSUZ8SBQQFS5IFBUUSJCVUFJOEJDBUFTUIBUUIFUZQFJTNFBOUUPCF
   VTFEBTBQSPQFSUZXSBQQFSUZQF BOEQSPWJEFTBQPJOUBUXIJDIUIF
   DPNQJMFSDBOWFSJGZBOZPUIFSDPOTJTUFODZSVMFT
   5IFQSPQFSUZXSBQQFSUZQFNVTUIBWFBQSPQFSUZOBNFEXSBQQFE7BMVF
   XIPTFBDDFTTMFWFMJTUIFTBNFBTUIBUPGUIFUZQFJUTFMG5IJTJTUIF
   QSPQFSUZVTFECZUIFDPNQJMFSUPBDDFTTUIFVOEFSMZJOHWBMVFPOUIF
   XSBQQFSJOTUBODF
   1SPQFSUZ8SBQQFS
   IUUQTHJUIVCDPNBQQMFTXJGUFWPMVUJPOCMPCNBTUFSQSPQPTBMTQSPQFSUZ
   XSBQQFSTNEQSPQFSUZXSBQQFSUZQFT
   

   View Slide

4. ϓϩύςΟϥούʔλΠϓ͸ɺϓϩύςΟϥούʔͱͯ͠࢖༻Ͱ͖ΔλΠϓͰ͢ɻ
   ϓϩύςΟϥούʔλΠϓʹ͸ͭͷجຊཁ͕݅͋Γ·͢ɻ
   ϓϩύςΟϥούʔλΠϓ͸ɺଐੑ!QSPQFSUZ8SBQQFSͰఆٛ͢Δඞཁ͕͋Γ
   ·͢ɻ͜ͷଐੑ͸ɺͦͷλΠϓ͕ϓϩύςΟϥούʔλΠϓͱͯ͠࢖༻͞ΕΔ
   ͜ͱΛҙຯ͠ɺίϯύΠϥ͕ଞͷҰ؏ੑϧʔϧΛݕূͰ͖ΔϙΠϯτΛఏڙ͠·
   ͢ɻ
   ϓϩύςΟϥούʔλΠϓʹ͸ɺXSBQQFE7BMVFͱ͍͏໊લͷϓϩύςΟ͕ඞཁ
   Ͱ͢ɻ͜ͷϓϩύςΟͷΞΫηεϨϕϧ͸ɺλΠϓࣗମͷΞΫηεϨϕϧͱಉ͡
   Ͱ͢ɻ͜Ε͸ɺϥούʔΠϯελϯεͷجʹͳΔ஋ʹΞΫηε͢ΔͨΊʹίϯύ
   Πϥ͕࢖༻͢ΔϓϩύςΟͰ͢ɻ
   1SPQFSUZ8SBQQFS
   IUUQTHJUIVCDPNBQQMFTXJGUFWPMVUJPOCMPCNBTUFSQSPQPTBMTQSPQFSUZ
   XSBQQFSTNEQSPQFSUZXSBQQFSUZQFT
   

   View Slide

5. w ஋͕มߋ͞ΕΔͨͼʹͦΕΛτϦΨʔʹԿΒ͔ͷؔ࿈ϩ
   δοΫΛ࣮ߦ͢Δɻ
   w ྫ͑͹Ұ࿈ͷϧʔϧʹैͬͯ৽͍͠஋Λݕূͨ͠ΓɺׂΓ
   ౰ͯΒΕͨ஋ΛԿΒ͔ͷํ๏Ͱม׵ͨ͠Γɺ஋͕มߋ͞
   Εͨ࣌ʹΦϒβʔόʔʹ௨஌ͨ͠Γɻ
   w ͦͷΑ͏ͳৼΔ෣͍Λ࠶ར༻Ͱ͖ΔΑ͏ʹ͢Δɻ
   

   View Slide

6. View Slide

7. !QSPQFSUZ8SBQQFS
   

   View Slide

8. !QSPQFSUZ8SBQQFS
   XSBQQFE7BMVF
   !QSPQFSUZ8SBQQFS
   

   View Slide

9. !)PHF
   Ξϊςʔγϣϯ
   !QSPQFSUZ8SBQQFS
   

   View Slide

10. !QSPQFSUZ8SBQQFS
    

    View Slide

11. QSPKFDUFE7BMVF
    w 1SPQFSUZ8SBQQFSࣗ਎ʹΞΫηε͢Δ
    w QSPKFDUFE7BMVFϓϩύςΟΛఆٛ͢ΔͱQSPQFSUZ
    XSBQQFSUZQFT΁ͷ౤Өม਺ʢYYYʣ͕ఏڙ͞ΕΔ
    

    View Slide

12. QSPKFDUFE7BMVF
    QSPKFDUFE7BMVF
    

    View Slide

13. QSPKFDUFE7BMVF
    GPP
    

    View Slide

14. QSPKFDUFE7BMVF
    

    View Slide

15. View Slide

16. FY
    $BQJUBMJ[FE
    

    View Slide

17. View Slide

18. FY
    6TFS%FGBVMU
    

    View Slide

19. FY
    6TFS%FGBVMU
    

    View Slide