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
Property Wrappersがもたらす新しいSwiftプログラミング / New Swi...
Search
darquro
September 06, 2019
Technology
3
1.6k
Property Wrappersがもたらす新しいSwiftプログラミング / New Swift programming with Property Wrappers
iOSDC Japan 2019 day1(2019/8/6) Track A LT 16:15
darquro
September 06, 2019
Tweet
Share
More Decks by darquro
See All by darquro
技術的負債を解消してくための組織づくり
darquro
1
970
Jailbreakと向き合おう
darquro
0
2.4k
ラクマでのSwiftUI導入方針とTips / Rakuma SwiftUI Introduction Policy and Tips
darquro
2
5.2k
Half modal comparision in iOS15
darquro
2
2k
2 Years Challenge as Engineering Manager in Rakuma
darquro
0
120
iOS View Class Design Basic
darquro
3
760
Swift 5 Exclusivity Enforcement
darquro
4
820
SDK連携を用いたAdMob活用法
darquro
1
1k
ContributingSwift
darquro
0
85
Other Decks in Technology
See All in Technology
Contributing to Rails? Start with the Gems You Already Use
yahonda
2
120
Enhancing SaaS Product Reliability and Release Velocity through Optimized Testing Approach
ropqa
1
250
敢えて生成AIを使わないマネジメント業務
kzkmaeda
2
500
Rethinking Incident Response: Context-Aware AI in Practice
rrreeeyyy
1
230
Getting to Know Your Legacy (System) with AI-Driven Software Archeology (WeAreDevelopers World Congress 2025)
feststelltaste
1
180
United airlines®️ USA Contact Numbers: Complete 2025 Support Guide
unitedflyhelp
0
330
AWS CDK 開発を成功に導くトラブルシューティングガイド
wandora58
3
140
PO初心者が考えた ”POらしさ”
nb_rady
0
220
SREのためのeBPF活用ステップアップガイド
egmc
1
780
Amplify Gen2から知るAWS CDK Toolkit Libraryの使い方/How to use the AWS CDK Toolkit Library as known from Amplify Gen2
fossamagna
0
150
SREの次のキャリアの道しるべ 〜SREがマネジメントレイヤーに挑戦して、 気づいたこととTips〜
coconala_engineer
1
590
[ JAWS-UG千葉支部 x 彩の国埼玉支部 ]ムダ遣い卒業!FinOpsで始めるAWSコスト最適化の第一歩
sh_fk2
2
150
Featured
See All Featured
Become a Pro
speakerdeck
PRO
29
5.4k
A better future with KSS
kneath
238
17k
Understanding Cognitive Biases in Performance Measurement
bluesmoon
29
1.8k
Six Lessons from altMBA
skipperchong
28
3.9k
The Art of Programming - Codeland 2020
erikaheidi
54
13k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
35
2.4k
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
107
19k
Done Done
chrislema
184
16k
A Tale of Four Properties
chriscoyier
160
23k
What's in a price? How to price your products and services
michaelherold
246
12k
VelocityConf: Rendering Performance Case Studies
addyosmani
332
24k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
161
15k
Transcript
Re:valua t ion https://fril.jp/ L ead & Delight User F
irst Ownership Fail Smart 1SPQFSUZ8SBQQFST͕ͨΒ͢ ৽͍͠4XJGUϓϩάϥϛϯά !J04%$+BQBO
J04&OHJOFFS 3BLVUFO JOD ϥΫϚ "CPVU.F EBSRVSP :VLJ,VSPEB
!EBSRVSP !EBSRVSP
1SPQFSUZ8SBQQFST
1SPQFSUZ8SBQQFST w "WBJMBCMF4XJGU w ϓϩύςΟΞΫηεʹԠͯ͡ڍಈΛXSBQ w ϓϩύςΟΠϯελϯε͝ͱʹσʔλΛอ࣋Մೳ w
ॳظԆ࣮ߦ
6TFS%FGBVMUT&YBNQMF @propertyWrapper struct UserDefault<T> { var wrappedValue: T
{ get { return UserDefaults.standard .object(forKey: key) as? T ?? defaultValue } set { UserDefaults.standard.set(newValue, forKey: key) } } }
6TFS%FGBVMUT&YBNQMF @propertyWrapper struct UserDefault<T> { let key: String
let defaultValue: T init(_ key: String, defaultValue: T) { self.key = key self.defaultValue = defaultValue UserDefaults.standard .register(defaults: [key: defaultValue]) } var wrappedValue: T { … } }
6TFS%FGBVMUT&YBNQMF struct Foo { @UserDefault("IS_LOGGED_IN", defaultValue: false) static
var isLoggedIn: Bool } Foo.isLoggedIn = true // UserDefaults.standard.object(forKey: "IS_LOGGED_IN") -> 1 Foo.isLoggedIn = false // UserDefaults.standard.object(forKey: "IS_LOGGED_IN") -> 0
6TFS%FGBVMUT&YBNQMF
4UBUF&YBNQMF struct LandmarkList: View { @State var showFavoriteOnly
= true var body: some View { NavigationView { List { Toggle(isOn: $showFavoriteOnly) { Text("Favorite Only") } … } … }
4UBUF&YBNQMF @propertyWrapper public struct State<Value> : DynamicProperty, BindingConvertible
{ …… /// The current state value. public var wrappedValue: Value { get nonmutating set } …… /// Produces the binding referencing this state value public var projectedValue: Binding<Value> { get } }
7BMJEBUJPO&YBNQMF @propertyWrapper struct Validate<Value> { var wrappedValue: Value?
var isValid: Bool { guard let value = wrappedValue else { return false } return validateion(value) } private let validateion: (Value) -> Bool private let messageClosure: (Value) -> String init(_ validation: @escaping (Value) -> Bool, message messageClosure: @escaping (Value) -> String) { self.validateion = validation self.messageClosure = messageClosure } }
7BMJEBUJPO&YBNQMF enum StringValidationType { case email case phoneNumber
var regex: String { switch self { case .email: return #"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za- z]{2,64}"# case .phoneNumber: return "^[0-9]{6,14}$" } } }
7BMJEBUJPO&YBNQMF extension Validate where Value == String {
init(_ type: StringValidationType) { self.init({ $0.range(of: type.regex, options: .regularExpression) != nil }, message: { "Error:\($0) does not match email" }) } }
7BMJEBUJPO&YBNQMF struct Foo { @Validate(.email) var email: String?
@Validate(.phoneNumber) var phoneNumber: String? var isValidAll: Bool { _email.isValid && _phoneNumber.isValid } } var foo = Foo() foo.email = "
[email protected]
" foo.phoneNumber = "09012341234" foo.isValidAll // -> "true"
நԽ
நԽ w ܧঝ w 1SPUPDPM w &YUFOTJPOT w
1SPQFSUZ8SBQQFST
நԽ 1SPQFSZ8SBQQFST ࣮ίετ ந 1SPUPDPM &YUFOTJPOT ܧঝ
ల ΞʔΩςΫνϟ ϑϨʔϜϫʔΫ σβΠϯύλʔϯ 044ϥΠϒϥϦ
·ͱΊ
·ͱΊ 1SPQFSUZ8SBQQFST w ΑΓநతʹػೳΛϓϩύςΟͷΈʹఏڙͰ͖Δ w ϘΠϥʔϓϨʔτͷলུʹͳΔ w !YYY@YYYYYYͱ͍ͬͨಠࣗͷγϯλοΫε
4XJGU&WPMVUJPO1SPQPTBM IUUQTHJUIVCDPNBQQMFTXJGUFWPMVUJPOCMPCNBTUFSQSPQPTBMTQSPQFSUZXSBQQFSTNE
5IBOLZPV