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Introducing Function Builder
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100059
December 17, 2019
Technology
3
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Introducing Function Builder
potatotips #267
2019/12/17
100059
December 17, 2019
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Transcript
Introducing Function Builder potatotips #267 2019/12/17
Akihisa Sengoku @akihisasen גࣜձࣾαΠόʔΤʔδΣϯτ AmebaʢΞϝʔόʣ iOSΤϯδχΞ
Function Builderͱʁ
4XJGU6*ͰΘΕ͍ͯΔΫϩʔδϟʔతͳͷʁ
%4-Λॻ͘͜ͱ͕Ͱ͖ΔΑ͏ʹͳͬͨʁ
4XJGUͰՃ͞Εͨ৽ػೳ 1SPQPTBM 'PSVN
BuilderͷϧʔϧʹैͬͯؔΛ ҉తʹม͢Δ͜ͱ͕Ͱ͖Δ #VJMEFSΛ దԠͨؔ͠ #VJMEFSϧʔϧʹ Ԡͯؔ͡Λม #VJMEFSΛఆٛ #VJMEFSΛ దԠ
None
None
Function BuilderʹΑΓ ಠࣗͷDSLΛΑΓ࡞͘͢͠ͳͬͨ - Structure Data (json, XML) - UI
View Hierarchies - HTML DOM Hierarchies
࡞Γํ!
#VJMEFSͷ࡞ํ๏ʹ͍ͭͯ
Builderͷ࡞ํ๏ 1. struct or classͷલʹ`@_functionBuilder`Λ͚ͭͯ ఆٛ͢Δɻ 2. static func Ͱ
`buildBlock(_ components: Component...) -> Component` Λఆٛ͢Δɻ
ͦͷଞͷbuildͷ࣮ • buildExpression(_ expression: Expression) -> Component • buildFunction(_ components:
Component...) - > Return • buildDo(_ components: Component...) -> Component • buildOptional(_ component: Component?) -> Component
'VODUJPO#VJMEFSͷ༻ํ๏
Function Builderͷ༻ํ๏ 1. Function BuilderΛ༻͍ͨؔ͠ͷલʹ @FunctionBuilder໊Λ͚ͭΔ 2. BuilderͷbuildBlockʹରԠ͢ΔҾΛɺ վߦ۠ΓͰهड़
ؔͷҾͷΫϩʔδϟͰFunction Builder Λ༻͢Δ͜ͱ͕Ͱ͖Δ
None
ϓϩμΫτಋೖ
SwiftUI HTML NSAttributedString Network UIKit ϓϩμΫτಋೖ: DSL
Amebaͷಋೖྫ NSAttributedStringͷIFΛ៉ྷʹ 5JQT
What's New in Swift - WWDC2019 https://developer.apple.com/videos/play/ wwdc2019/402/ Function Builder
- swift-evolution https://github.com/apple/swift-evolution/blob/ 9992cf3c11c2d5e0ea20bee98657d93902d5b17 4/proposals/XXXX-function-builders.md