Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Fun with Swift 4 KeyPaths

Avatar for John Estropia John Estropia
September 17, 2017
Technology
660
1

Fun with Swift 4 KeyPaths

My Lightning Talk at iOSDC 2017 Japan

Avatar for John Estropia

John Estropia

September 17, 2017

More Decks by John Estropia

See All by John Estropia
WWDC Party Intro to CoreStore
Avatar for John Estropia johnestropia
0
70
Making an Efficient Deploy Bot
Avatar for John Estropia johnestropia
0
460
Creating Keyboard Extensions
Avatar for John Estropia johnestropia
0
87
Making Sense of Neural Network Training
Avatar for John Estropia johnestropia
0
100
My journey taming Core Data: An intro to the CoreStore library
Avatar for John Estropia johnestropia
0
180
Pairs JP Team's iOS Deployment
Avatar for John Estropia johnestropia
0
970
Making Slackbots deploy iOS apps for you
Avatar for John Estropia johnestropia
2
250
OSSの作法（本題）
Avatar for John Estropia johnestropia
0
85

Other Decks in Technology

See All in Technology
Jetpack Compose で挑む新聞紙面UI ─ 複合ジェスチャー・ポリゴン記事領域・適応的ページ構成という3つの壁/droidkaigi2026
Avatar for 日本経済新聞社 エンジニア採用事務局 nikkei_engineer_recruiting
0
160
JAWS-UG初心者支部#88わいわい初心塾(夏休みの宿題やったかGit編)
Avatar for おーつき otsuki
0
110
いかに伝えるか　〜新卒エンジニアの教育のための、ライトノベル活用の一例
Avatar for Akira Ikeda（池田 暁） ikedon
1
170
Bet AI Day 2026丨Production-Ready AI Agents — エンタープライズの実務を任せるための設計と運用
Avatar for LayerX layerx
PRO
3
1.9k
Self Healing Rollouts: Automating Production Fixes with Agentic AI
Avatar for Kevin Dubois kdubois
0
140
AI-DLCって実際どう？ 〜聞きたいこと全部聞いてみる〜
Avatar for 荒木 ARK news_it_enj
0
200
Genie Code ワークショップ 応用編 / Genie-Code-Workshop-advanced
Avatar for Databricks Japan databricksjapan
PRO
0
280
魔法少女がClaude Codeを監視する / ccportal-deck
Avatar for Noriyuki TAKEI noriyukitakei
3
120
データエンジニアの困りごとをDevinと一緒に解消する
Avatar for 10xinc 10xinc
2
750
Bet AI Day 2026丨Agentは、「金融」という巨大産業の何を変えられるのか
Avatar for LayerX layerx
PRO
0
630
なぜSRE・セキュリティは評価されないのか？守りの組織を事業成長エンジンに変えた実践
Avatar for サイバーセキュリティクラウド cscengineer
PRO
2
1.9k
AndroidでHDRメディアを「壊さずに」扱う
Avatar for Kazuki Chigita chigichan24
0
320

Featured

See All Featured
The Hidden Cost of Media on the Web [PixelPalooza 2025]
Avatar for Tammy Everts tammyeverts
2
490
No one is an island. Learnings from fostering a developers community.
Avatar for Antonio thoeni
21
3.8k
Avoiding the “Bad Training, Faster” Trap in the Age of AI
Avatar for Mike Taylor tmiket
0
230
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
Avatar for Eileen M. Uchitelle eileencodes
28
3.6k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
Avatar for Stéphanie Walter stephaniewalter
287
14k
Why Your Marketing Sucks and What You Can Do About It - Sophie Logan
Avatar for Sophie Logan marketingsoph
0
400
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
Avatar for mongodb mongodb
49
10k
Building the Perfect Custom Keyboard
Avatar for Naoto Takai takai
2
860
My Coaching Mixtape
Avatar for mlcsv mlcsv
0
300
Fireside Chat
Avatar for paigeccino paigeccino
42
4k
Color Theory Basics | Prateek | Gurzu
Avatar for Gurzu gurzu
0
450
Impact Scores and Hybrid Strategies: The future of link building
Avatar for Tamara Novitovic tamaranovitovic
0
430

Transcript

  1. Fun with Swift 4 KeyPaths iOSDC 2017 John Estropia

  2. • @JohnEstropia • Senior Engineer @ • iOS։ൃ • OSS

    ࣗݾ঺հ http://github.com/JohnEstropia/CoreStore

  3. Swift 4 Smart Keypaths

  4. KVC: Before vs. After Swift 3 Swift 4

  5. KVC: Before vs. After Swift 3 Swift 4

  6. KVO: After Swift 4

  7. Fun with Swift 4 KeyPaths

  8. Predicates (Before)

  9. ͜ͷॻ͖ํ͕Ͱ͖Δͱ࠷ߴͰ͠ΐ͏ʁ

  10. ͜ͷॻ͖ํ͕Ͱ͖Δͱ࠷ߴͰ͠ΐ͏ʁ

  11. KeyPath × Generics × Custom Operator

  12. Custom Operator

  13. KeyPath Generics

  14. KeyPath Generics ͕͜͜Smartʂ

  15. KeyPath→String

  16. ൿີຐ๏property KeyPath→String

  17. Nice Predicates

  18. Sample: CoreStore ( prototype/queryBuilders branch )

  19. Sample: CoreStore ( prototype/queryBuilders branch )

  20. Ҏ্ɺThanks!

  21. େืूதʂ