Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
[SE-0160] Limiting @objc inference
Search
d_date
April 13, 2017
Programming
2
2.5k
[SE-0160] Limiting @objc inference
2017/04/13(木) Potatotips #39
d_date
April 13, 2017
Tweet
Share
More Decks by d_date
See All by d_date
TCA Practice in 5 min
d_date
2
1.5k
waiwai-swiftpm-part2
d_date
3
510
わいわいSwift PM part 1
d_date
2
410
What's new in Firebase 2021
d_date
2
1.5k
CI/CDをミニマルに構築する
d_date
1
580
Swift Package centered project - Build and Practice
d_date
20
14k
How to write Great Proposal
d_date
4
1.7k
Thinking about Architecture for SwiftUI
d_date
8
2.4k
Integrate your app to modern world in Niigata
d_date
0
680
Other Decks in Programming
See All in Programming
XP, Testing and ninja testing
m_seki
3
240
Code as Context 〜 1にコードで 2にリンタ 34がなくて 5にルール? 〜
yodakeisuke
0
130
Is Xcode slowly dying out in 2025?
uetyo
1
270
Result型で“失敗”を型にするPHPコードの書き方
kajitack
5
650
すべてのコンテキストを、 ユーザー価値に変える
applism118
3
1.3k
効率的な開発手段として VRTを活用する
ishkawa
0
140
PostgreSQLのRow Level SecurityをPHPのORMで扱う Eloquent vs Doctrine #phpcon #track2
77web
2
530
ruby.wasmで多人数リアルタイム通信ゲームを作ろう
lnit
3
470
A full stack side project webapp all in Kotlin (KotlinConf 2025)
dankim
0
120
Google Agent Development Kit でLINE Botを作ってみた
ymd65536
2
250
PHPでWebSocketサーバーを実装しよう2025
kubotak
0
280
技術同人誌をMCP Serverにしてみた
74th
1
640
Featured
See All Featured
Learning to Love Humans: Emotional Interface Design
aarron
273
40k
Keith and Marios Guide to Fast Websites
keithpitt
411
22k
Optimizing for Happiness
mojombo
379
70k
10 Git Anti Patterns You Should be Aware of
lemiorhan
PRO
656
60k
Writing Fast Ruby
sferik
628
62k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
251
21k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
Practical Orchestrator
shlominoach
189
11k
Reflections from 52 weeks, 52 projects
jeffersonlam
351
20k
How to train your dragon (web standard)
notwaldorf
95
6.1k
The Cost Of JavaScript in 2023
addyosmani
51
8.5k
Being A Developer After 40
akosma
90
590k
Transcript
[SE-0160] Limiting @objc inference Daiki Matsudate (@d_date) potatotips #39
None
None
None
Agenda • ͱͯ140จࣈͰπΠʔτͰ͖ͳ͍ • [SE-0160] Limiting @objc inferenceʹ͍ͭͯ ͠·͢ɻ
[SE-0160] @objcਪͷ੍ݶ • https://github.com/apple/swift-evolution/ blob/master/proposals/0160-objc- inference.md
@objc in Swift 3.x • Objective-CͰݺͼग़ͤΔͷʹ͍ͭͯɺSwift ଆͰ໌ࣔతʹએݴͰ͖Δ • Θ͟Θ͟@objcΛॻ͔ͳ͍͍ͯ͘Α͏ʹ ਪͯ͘͠ΕΔ
@objc in Swift 3.x ͷ • Objective-CͰݺͼग़ͤΔͷʹ͍ͭͯɺSwift ଆͰ໌ࣔతʹએݴͰ͖Δ • Θ͟Θ͟@objcΛॻ͔ͳ͍͍ͯ͘Α͏ʹ
ਪͯ͘͠ΕΔ → աͰʁʁ
@objc in Swift 3.x ͷ • SwiftͷΫϥεObjective-CͷSelectorͷিಥΛ Ҿ͖ى͕ͪ͜͠
@objc in Swift 3.x ͷ • Swift API Design GuidelineʹԊͬͯॻ͍ͯɺ
Objective-CͰݺͼग़͢ͱ͖ʹObjective-C Coding Guidelineʹ͢Δ໊લʹม͞Ε͕ͪɻ ಛʹɺinitializerɺͦͷ໊લʹୈҰҾΛؚΊͳ ͍͚ͯ͘ͳ͍ͷͰɺ@objcඞ͚ͣͭΔ͜ͱʹ ͳΔɻ
• SwiftίϯύΠϥObjective-C Calling Convention͔ΒSwift Calling Conventionม ͢Δ"thunk"ϝιουΛ࡞ΔͨΊɺόΠφϦαΠζ ͕૿େ͢Δɻ @objc in
Swift 3.x ͷ
@objc in future
@objc in future Objective-CͰඞཁͳͱ͜Ζ͚ͩʹ@objcΛ ͚ͭΔΑ͏ʹਪΛݮΒ͢ ʲํʳ
Ҿ͖ଓ͖@objcΛਪ͢Δͷ 1.@objcͷ͍͍ͭͯΔએݴͷΦʔόʔϥΠυͷͱ͖
Ҿ͖ଓ͖@objcΛਪ͢Δͷ 2. @objcͷ͍ͭͨϓϩτίϧͷཁ݅Λຬͨ͢ͱ͖
Ҿ͖ଓ͖@objcΛਪ͢Δͷ 3. @IBOutlet,@IBActionଐੑ͕͍͍ͭͯΔͱ͖ 4. @NSManagedଐੑ͕͍͍ͭͯΔͱ͖ Interface BuilderͱͷΠϯλϥΫγϣϯ͕ Objective-CϥϯλΠϜͰߦΘΕΔͨΊ Core DataͱͷΠϯλϥΫγϣϯ͕
Objective-CϥϯλΠϜͰߦΘΕΔͨΊ
ՃͰ@objcΛਪ͢Δͷ 1. @GKInspectableଐੑ͕͍͍ͭͯΔͱ͖ 2. @IBInspectableଐੑ͕͍͍ͭͯΔͱ͖ GameplayKitͱͷΠϯλϥΫγϣϯ͕ Objective-CϥϯλΠϜͰߦΘΕΔͨΊ Interface BuilderͱͷΠϯλϥΫγϣϯ͕ Objective-CϥϯλΠϜͰߦΘΕΔͨΊ
@objcΛਪ͠ͳ͘ͳΔͷ 1. dynamic
@objcΛਪ͠ͳ͘ͳΔͷ 2. NSObject༝དྷͷΫϥε NSObjectΛܧঝ͍ͯ͠ΔΫϥεͰ͋ͬͯɺ @objcͳ͠ͰObjective-C͔Βݺͼग़ͤͳ͍ɻ
@objcΛਪ͠ͳ͘ͳΔͷ 2. NSObject༝དྷͷΫϥε extensionͰɺ@objcͳ͠ͰObjective-C͔Βݺͼ ग़ͤͳ͍ɻ
@objcMembersͷಋೖ XCTestͳͲɺΫϥεશମ͕@objcͰ͋Δ͜ͱ͕ٻΊΒ ΕΔࡍɺ@objcMembersΛ͚ͭΔ
@objcMembersͷಋೖ @objcMembersΛ͚ͭΔΫϥεɺObjecive-Cଆ Ͱ swift_objc_membersΛ͚ͭΔ
Extensionʹ͓͚Δ@objcͷON/OFF @nonobjcΛextensionʹ͚ͭΔ͜ͱͰɺ@objcͷ ର֎ͱ͢Δ͜ͱ͕Ͱ͖Δɻ
Swift 4Ҡߦͷͱ͖ Ͳ͏͢Ε͍͍ͷ…ʁ
"Minimal" migration workflow
Minimal migration workflow • Step 1: Swift 4ϞʔυͰɺ@objcਪ͞ΕͨՕॴͷ͢ ͯͷܯࠂΛղফ͢Δɻ
Minimal migration workflow • Step 2: SWIFT_DEBUG_IMPLICIT_OBJC_ENTRYPOINTΛ1ʙ3 ͷؒͷʹઃఆ͠ɺΞϓϦΛςετɻ 1.ΤϯτϦϙΠϯτͷݺग़ΛϝοηʔδͰه 2.ϩάΛͱΓɺόοΫτϨʔεΛൃߦ
3.όοΫτϨʔεͰه͠ɺΫϥογϡ͠·͢ɻ
Minimal migration workflow • Step 3: ͜ͷ࣌ͰɺSwift 4ʹҠߦՄೳɻSwift 4ΛϏϧ υ͢Δͱɺഇࢭ༧ఆͷϧʔϧʹج͍ͮͯ@objc
͕ਪଌ͞ΕͨΓͷέʔεͷObjective-CΤϯτ ϦϙΠϯτ͕আ͞ΕΔɻ
·ͱΊ • dynamic, NSObject༝དྷͷΫϥεͰ@objcਪ ͕͞Εͳ͘ͳΔ • @objcMembersʹΑΓclassશମʹ@objcΛదԠ Ͱ͖ΔΑ͏ʹͳΔ • @nonobjcΛextensionʹదԠ͢Δ͜ͱͰͦͷ
extension@objcͷదԠ֎ͱ͢Δ͜ͱ͕Ͱ͖Δ
એ
Thank you