(Appleが)やりたい放題 Swift Attributes

札幌iPhoneアプリ開発者勉強協会資料
https://devsap.connpass.com/event/207402/

題目
1) SwiftUIで説明しづらい@定義
2) Swift Attributesを大枠で分けてみる
3) Swift Attributesから見るSwiftの進化
4) まとめ

Transcript

1. "QQMF͕ ΍Γ͍ͨ์୊
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   "UUSJCVUFT
2. ࣗݾ঺հ
3. ೳొ
   ཁ
   !OPUPSPJE w J04ΞϓϦ։ൃऀ
   w ԰߸͍Γ·͢ిࢉاը
   w !OPUPSPJE
   w !JSJNBTV
   w ࠷ۙͷಈ޲
   w ϒϩά࡮৽͠·ͨ͠
4. ॆిใࠂ͞Μ
   #BUUFSFDFJWFS w όοςϦʔϞχλʔ ϢʔςΟϦςΟʔ
   w ࠷େ୆ ࣮ػ ϦϞʔτ୆
   w ख࣋ͪͷJ1IPOF͔Βଞʹ͍࣋ͬͯΔ J1IPOF J1BEͳͲͷػثͷόοςϦʔঢ়ଶ֬ ೝՄೳ
   w ࣗ୐ʹ͋ΔJ1IPOFͷόοςϦʔঢ়ଶ֬ೝՄ ೳ
5. ॆిใࠂ͞Μ
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   w $PNQMJDBUJPOTରԠ
   w ॆి׬ྃ௨஌
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6. ࿩͢͜ͱ w 4XJGU
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   w "QQMFͷͱΓ͏Δಈ͖Λ༧ଌ͢Δ
7. ࿩͞ͳ͍͜ͱ w 4XJGU"UUSJCVUFTͷৄࡉ
   w ιʔείʔυΛ࢖ͬͨղઆ
8. ୊໨ w 4XJGU6*Ͱઆ໌ͮ͠Β͍!ఆٛ
   w 4XJGU
   "UUSJCVUFTΛେ࿮Ͱ෼͚ͯΈΔ
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   w ·ͱΊ
9. 4XJGU6*Ͱઆ໌ͮ͠Β͍!ఆٛ
10. J04
    5FDI
    #MPH JSJNBTVDPN ઈࢍ౤ߘதͰ͢
11. 4XJGU6*
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12. ϒϩάهࣄΛ
    ݕ౼͍ͯͨ͋͠Δ೔
13. TextFieldͷهࣄΛॻ͜͏
14. import SwiftUI struct ContentView: View { @State var myfield = "" @ScaledMetric(relativeTo: .body) var @ScaledMetric(relativeTo: .body) var @ScaledMetric(relativeTo: .body) var @ScaledMetric(relativeTo: .body) var var body: some View { VStack { Spacer() TextField("Label", text: $my .padding(EdgeInsets(top: .background( Rectangle() .stroke(Color.gr ) .padding() TextField("Label", text: $my .padding(EdgeInsets(top:
15. import SwiftUI struct ContentView: View { @State var myfield = "" @ScaledMetric(relativeTo: .body) var @ScaledMetric(relativeTo: .body) var @ScaledMetric(relativeTo: .body) var @ScaledMetric(relativeTo: .body) var var body: some View { VStack { Spacer() TextField("Label", text: $my .padding(EdgeInsets(top: .background( Rectangle() .stroke(Color.gr ) .padding() TextField("Label", text: $my .padding(EdgeInsets(top:
16. !4UBUF
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    ໊শͰ͢Βͳ͍ɻ
19. !ఆٛͱ͸ͳΜͳͷ͔
20. QSPQFSUZ8SBQQFS ωλόϨ ͩΑɻ
21. ͦΜͳࣄ͸
    Θ͔͍ͬͯΔͷͩΑɻ
22. !ఆٛपΓେ࿮Ͱௐ΂ͯ
    "QQMFͷ܏޲Λ஌Γ͍ͨɻ
23. 4XJGU"UUSJCVUFΛେ࿮Ͱ
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24. !ఆٛͷਖ਼໊ࣜশ͸
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26. 4XJGU
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27. 4XJGU
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28. 4XJGU
    "UUSJCVUFTᶅ J04
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30. ެࣜͷϖʔδͰ͸ΞϧϑΝϕοτॱ
    ಛʹάϧʔϓԽ͞Ε͍ͯͳ͍
31. ଟ͍ͷͰେ࿮Ͱ෼ྨͯ͠Έͨ
32. େ࿮Ͱ෼ྨᶃ B ઌୡݴޠͱͷޓ׵ੑ
    C 4XJGUݴޠͷ࢓༷Λิ଍͢Δ΋ͷ
    D ϑϨʔϜϫʔΫ։ൃͷαϙʔτ
    E 4UPSZCPBSETʹؔ͢Δಛघࣄ৘ʹΑΔ΋ͷ
    F ݻ༗ϑϨʔϜϫʔΫ΁ͷରԠ
    G ֎తͳ࢓༷มߋʹରԠ͢Δඞཁ͕͋Δ΋ͷ
33. େ࿮Ͱ෼ྨᶄ H Ϗϧυ࣌ͷνϡʔχϯάΛ໌ࣔ͢Δ΋ͷ
    I ςετ࣌ͷརศੑΛਤΔ΋ͷ
    J ஗ԆධՁɾಈతࢀরΛಋೖ͍ͨ͠΋ͷ
    K ଞݴޠͱͷݺͼग़͠ํ๏Λॊೈʹ͢Δ΋ͷ
    L 4XJGUݴޠࣗମΛ֦ு͢Δ΋ͷ
34. Bઌୡݴޠͱͷޓ׵ੑ w $ݴޠΛݺͼग़͠Մೳʹ
    0CKFDUJF$Λݺͼग़͠Մೳʹ
    w ؔ਺ϙΠϯλͷޓ׵ੑࢦఆ !DPOWFOUJPO
    w ໭Γ஋͕͋Δ͕ෆཁѻ͍ʹରԠ͢ΔͨΊ !EJTDBSEBCMF3FTVMU
    w 0CKFDUJWF$ͷϓϩύςΟͷίϐʔଐੑରԠ !/4$PQZJOH
    w NBJOؔ਺ͷӅṭ !6*"QQMJDBUJPO.BJO
    !/4"QQMJDBUJPO.BJO
    w ϚϧνϓϥοτϑΥʔϜʹ΋ରԠͨ͠NBJOؔ਺ͷӅṭ !NBJO
35. C4XJGUݴޠͷ࢓༷Λิ଍͢Δ΋ͷ w είʔϓ֎Ͱ΋Ϋϩʔδϟʔอ࣋Λ໌ࣔ͢Δ΋ͷ !FTDBQJOH
36. DϑϨʔϜϫʔΫ։ൃͷαϙʔτ w ϑϨʔϜϫʔΫར༻ऀʹඇਪ঑Ͱ͋Δ͜ͱΛࣔ͢(@available) w SwiftͰ࡞੒͞ΕͨϑϨʔϜϫʔΫ w ʙΛObjectie-C͔Βݺͼग़͠Մೳʹ(@objc) w ʙΛObjective-C͔Βݺͼग़͠ෆՄʹ(@nonobjc) w ʙΛObjective-C͔ΒҰׅͰݺͼग़͠Մೳʹ(@objcMembers) w τοϓϨϕϧͷΦϒδΣΫτ͕ଞϑϨʔϜϫʔΫͱࠞࡏΛආ͚Δ(@warn_unquali fi ed_access) w ໌ࣔతʹকདྷόʔδϣϯͰͷվมΛ੍ݶ͢Δ΋ͷ(@frozen)
37. E4UPSZCPBSETʹؔ͢Δಛघࣄ৘ʹΑΔ΋ͷ w 4XJGUݴޠͷݫີ͔͞Βݴ͏ͱ*OUFSGBDF#VJMEFSͷ"DUJPO
    0VUMFU͸͔ͳΓ ಛघͳಈ͖ w @IBAction w @IBOutlet w @IBDesignable w @IBInspectable w @IBSegueAction
38. Fݻ༗ϑϨʔϜϫʔΫ΁ͷରԠ w (BNF,JUʹରԠ͢Δ΋ͷ !(,*OTQFDUBCMF
    w $PSF%BUBʹରԠ͢Δ΋ͷ !/4.BOBHFE
    w !SFRVJSFT@TUPSFE@QSPQFSUZ@JOJUT
39. G֎తͳ࢓༷มߋʹରԠ͢Δඞཁ͕͋Δ΋ͷ w ྻڍʹະ஌ͷఆؚ͕ٛ·Εͨ৔߹ͷ৚݅هड़ !VOLOPXO
40. HϏϧυ࣌ͷνϡʔχϯάΛ໌ࣔ͢Δ΋ͷ w ΠϯϥΠϯల։ʹؔ͢Δ΋ͷ(@inlinable) w ΠϯϥΠϯల։಺Ͱͷར༻ʹ੍ݶ͢Δ΋ͷ(@usableFromInline)
41. Iςετ࣌ͷརศੑΛਤΔ΋ͷ w ςετ࣌ʹΞΫηεՄೳͱ͢Δ(@testable)
42. J஗ԆධՁΛಋೖ͍ͨ͠΋ͷ w Ҿ਺Ͱ౉͞Εͨ஋ΛΫϩʔδϟʔԽ͠஗ԆධՁͤ͞Δ(@autoclosure)
43. Kଞݴޠͱͷݺͼग़͠ํ๏Λॊೈʹ͢Δ΋ͷ w ߏ଄ମΛॊೈͳҾ਺Ͱݺͼग़ͤΔ༷ʹ͢Δ΋ͷ(@dynamicCallable) w ߏ଄ମΛ࣮૷࣌ʹଘࡏ͠ͳ͍ϓϩύςΟ΁ΞΫηεՄೳͱ͢Δ΋ͷ (@dynamicMemberLookup)
44. LݴޠࣗମΛ֦ு͢Δ΋ͷ w ม਺ʹ෇ՃͰ͖Δ4XJGU"UUSJCVUFΛ֦ு͢Δ !QSPQFSUZ8SBQQFS w ؔ਺ͷ໭Γ஋Λ༧໿ݴޠʹ·Ͱհೖ͠ػೳ֦ு͢Δ΋ͷ(@resultBuilder)
45. 4XJGU
    "UUSJCVUFTͷҹ৅͸
    ࡶଟͳػೳͷू߹ʹݟ͑Δ
46. ࡶଟ͕ͩ਺Λҙࣝ͠ͳ͍ͷ͸
    ༻్͝ͱ8FCͰݕࡧͯ͠࢖͏
47. 4XJGU
    "UUSJCVUFʹݴޠࣗମΛ֦ு͢Δ
    ػೳ͕૿͑ͨ͜ͱͰݕࡧΩʔϫʔυΛ
    બͿͷʹ೉ّ
48. 4XJGU
    "UUSJCVUFT͔ΒݟΔ
    4XJGUͷਐԽ
49. छʹ෼͚͕ͨ
50. छͰ΋ଟ͍Θ
51. छ͔ΒछΛϐοΫΞοϓ
52. 4XJGUਐԽͷྺ࢙ᶃ w 4XJGUॳظ
    w !*#0VUMFU !*#"DUJPO
    w $ݴޠɺ0CKFDUJWF$ͷػೳݺͼग़͠ɺ4%,ରԠ
53. Bઌୡݴޠͱͷޓ׵ੑ w $ݴޠΛݺͼग़͠Մೳʹ
    0CKFDUJF$Λݺͼग़͠Մೳʹ
    w ؔ਺ϙΠϯλͷޓ׵ੑࢦఆ !DPOWFOUJPO
    w ໭Γ஋͕͋Δ͕ෆཁѻ͍ʹରԠ͢ΔͨΊ !EJTDBSEBCMF3FTVMU
    w 0CKFDUJWF$ͷϓϩύςΟͷίϐʔଐੑରԠ !/4$PQZJOH
    w NBJOؔ਺ͷӅṭ !6*"QQMJDBUJPO.BJO
    !/4"QQMJDBUJPO.BJO
    w ϚϧνϓϥοτϑΥʔϜʹ΋ରԠͨ͠NBJOؔ਺ͷӅṭ !NBJO
54. E4UPSZCPBSETʹؔ͢Δಛघࣄ৘ʹΑΔ΋ͷ w 4XJGUݴޠͷݫີ͔͞Βݴ͏ͱ*OUFSGBDF#VJMEFSͷ"DUJPO
    0VUMFU͸͔ͳΓ ಛघͳಈ͖ w @IBAction w @IBOutlet w @IBDesignable w @IBInspectable w @IBSegueAction
55. 4XJGUਐԽͷྺ࢙ᶄ w 4XJGU࢓༷҆ఆظ
    w 4XJGUͷ࢓༷͕ݻ·Γ࢝Ί֦ுػೳ͕4XJGU
    "UUSJCVUF΁௥Ճ͢ΔΑ͏ʹ
    w 4XJGU͚ͩͰϑϨʔϜϫʔΫ࣮૷Մೳʹ
56. DϑϨʔϜϫʔΫ։ൃͷαϙʔτ w ϑϨʔϜϫʔΫར༻ऀʹඇਪ঑Ͱ͋Δ͜ͱΛࣔ͢(@available) w SwiftͰ࡞੒͞ΕͨϑϨʔϜϫʔΫ w ʙΛObjectie-C͔Βݺͼग़͠Մೳʹ(@objc) w ʙΛObjective-C͔Βݺͼग़͠ෆՄʹ(@nonobjc) w ʙΛObjective-C͔ΒҰׅͰݺͼग़͠Մೳʹ(@objcMembers) w τοϓϨϕϧͷΦϒδΣΫτ͕ଞϑϨʔϜϫʔΫͱࠞࡏΛආ͚Δ(@warn_unquali fi ed_access) w ໌ࣔతʹকདྷόʔδϣϯͰͷվมΛ੍ݶ͢Δ΋ͷ(@frozen)
57. 4XJGUਐԽͷྺ࢙ᶅ w ࠷ۙ ʙ
    w ଞݴޠͰͷݺͼग़͠Λ༻ҙʹ͢ΔͨΊಈతࢀরΛ࠶औΓࠐΈ
    w !ఆٛΛ֦ுͰ͖ΔΑ͏ʹ
    w ໭Γ஋ͷ֦ு ༧໿ޠ·Ͱؔ༩͢Δڍಈมߋ͕Մೳ
58. 4XJGUͷΞοϓσʔτྺ࢙ᶅ w ࠷ۙ ʙ
    w ଞݴޠͰͷݺͼग़͠Λ༻ҙʹ͢ΔͨΊಈతࢀরΛ࠶औΓࠐΈ
    w !ఆٛΛ֦ுͰ͖ΔΑ͏ʹ
    w ໭Γ஋ͷ֦ு ༧໿ޠ·Ͱؔ༩͢Δڍಈมߋ͕Մೳ ॏཁ
59. LݴޠࣗମΛ֦ு͢Δ΋ͷ w ม਺ʹ෇ՃͰ͖Δ4XJGU"UUSJCVUFΛ֦ு͢Δ !QSPQFSUZ8SBQQFS w ؔ਺ͷ໭Γ஋Λ༧໿ݴޠʹ·Ͱհೖ͠ػೳ֦ு͢Δ΋ͷ(@resultBuilder)
60. 4XJGU6*Ͱͷ4XJGU
    "UUSJCVUF w
    !SFTVMU#VJMEFS !@GVODUJPO#VJMEFS
    ͔Β໊শมߋ
    w 4XJGUͷ༧໿ޠɺฒͼ·Ͱؔ༩ 4XJGU6*্ͰͷJGจ
    w
    هड़ϧʔϧΛڧ੍ 4XJGU6*Ͱ͸ݴޠͷ%4-Խʹ࢖༻
    w هड़ΤϥʔΛίϯύΠϥϨϕϧͰิ଍Ͱ͖Δ
    w !QSPQFSUZ8SBQQFS
    w
    ม਺ʹ෇༩͢Δ
    4XJGU
    "UUSJCVUFΛ֦ு ಠࣗఆٛͷ௥Ճ
    w 4XJGU6*Ͱ͸ม਺ͷମࡋΛอͪͭͭ୺తʹػೳ෇༩ʹ࢖༻
61. struct ContentView: View { @State var isRounded = true // propertyWrapper // ViewͷBody͸1ͭͷView͔͠هड़Ͱ͖ͳ͍ var body: some View { // isRounded ʙ else ·Ͱ͸resultBuilderʹΑΔهड़ϧʔϧͰ͋ͬͯݴޠͷifจͱ͸ҟͳΔ // ৗʹܕ͸ҧ͏͕1ͭͷViewΛฦ͢ if isRounded { RoundedRectangle(cornerRadius: 20) .foregroundColor(.orange) .frame(width: 72, height: 72) .onTapGesture { isRounded = !isRounded } } else { Rectangle() .foregroundColor(.blue) .frame(width: 72, height: 72) .onTapGesture { isRounded = !isRounded } } } }
62. struct ContentView: View { @State var isRounded = true // propertyWrapper // ViewͷBody͸1ͭͷView͔͠هड़Ͱ͖ͳ͍ var body: some View { // isRounded ʙ else ·Ͱ͸resultBuilderʹΑΔهड़ϧʔϧͰ͋ͬͯݴޠͷifจͱ͸ҟͳΔ // ৗʹܕ͸ҧ͏͕1ͭͷViewΛฦ͢ if isRounded { RoundedRectangle(cornerRadius: 20) .foregroundColor(.orange) .frame(width: 72, height: 72) .onTapGesture { isRounded = !isRounded } } else { Rectangle() .foregroundColor(.blue) .frame(width: 72, height: 72) .onTapGesture { isRounded = !isRounded } } } } !QSPQFSUZ8SBQQFS !SFTVMU#VJMEFS
63. ։ൃऀ͔Βݟͨ 4XJGUͷΠϝʔδ ˡ$ݴޠɺ0CKFDUJWF$΋αϙʔτ͢Δ৽ݴޠ ˡݴޠػೳ͕ॆ࣮͠ɺ'31Ͱ࠷৽ϓϩάϥϛϯάٕ ज़ΛಋೖͰ͖ΔΑ͏ʹͳͬͨɻ 4XJGU6* ݴޠػೳ͕ҙਤ͠ͳ͍ํ޲Ͱ֦ு
64. "QQMF͕΍Γ͍ͨ์୊4XJGU • ݴޠతʹ͸Web։ൃऀʹ਌࿨ੑ͕͋Δ༷ʹઃܭ • FRPʹ઀ۙ͢ΔΘ͚Ͱ΋ͳ͍(ϦΞΫςΟϒϓϩάϥϛϯά) • OOPʹݻࣥ͢ΔΘ͚Ͱ΋ͳ͍(ΦϒδΣΫτࢦ޲) • ݴޠ࢓༷͸AppleҎ֎΋αϙʔτ͢Δ • (UbuntuɺCentOSɺAmazon Linux, Windows10) • ݴޠ࢓༷͕ݻ·ͬͯ΋Apple͸૊ΈࠐΈ͍ͨػೳ͸૊ΈࠐΉ
65. ͔͜͜Β͸༧ଌ
66. "QQMFͷ΍Γ͍ͨ์୊͸
    Ͳ͜ʹ޲͔͏ͷ͔
67. ৽σόΠε
68. ΋ͪΖΜͦ͏ͩ
69. ΋ͬͱ਎ۙͳଘࡏ͕
    ͍Δ͡Όͳ͍͔ɻ
70. 8FC"TTFNCMZ͔Βͷ
    8FCϑϩϯτΤϯυ ରԠ
71. ·ͱΊ w 4XJGU
    "UUSJCVUFTʹ͍ͭͯେ࿮Ͱ·ͱΊ·ͨ͠
    w 4XJGUͷݴޠ࢓༷͔Β֎ΕΔػೳ͕ࡶଟʹ4XJGU
    "UUSJCVUFTʹ௥Ճ͞ Ε͍ͯ·͢
    w 4XJGUͷݴޠ࢓༷ʹؔ܎ͳ͘"QQMF͸ࣗ෼ͷ΍Γ͍ͨػೳΛͶ͡ࠐΈ ·͢
72. IUUQTJSJNBTVDPN <13>
    #MPH
    ਵ࣌౤ߘத
73. ࢀߟ w 4XJGUͷBUUSJCVUFશղઆʛશछ
    
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    w IUUQTRJJUBDPNTIUOLHNJUFNTDCBCDECD
    w "UUSJCVUFT
    Š
    5IF
    4XJGU
    1SPHSBNNJOH
    -BOHVBHF
    4XJGU
    
    w IUUQTEPDTTXJGUPSHTXJGUCPPL3FGFSFODF.BOVBM"UUSJCVUFTIUNM
    w ʲ4XJGU
    ʳ1SPQFSUZ
    8SBQQFSTͱ͸ʁ
    c
    ଎Ͱา͘ώτ
    w IUUQTXXXOEXBMLFSDPNTXJGUQSPQFSUZXSBQQFST
    w 'VODUJPO#VJMEFSͰ༡΅͏
    
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