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
High-Order Components を使って 再利用性が高いコードを書く
Search
Ryunosuke Watanabe
January 30, 2019
Programming
4
860
High-Order Components を使って 再利用性が高いコードを書く
Reactのコンポーネントを再利用するテクニック「High-Order Components(HOC)」をFlutterで使う方法を簡単な例で説明します。
Ryunosuke Watanabe
January 30, 2019
Tweet
Share
More Decks by Ryunosuke Watanabe
See All by Ryunosuke Watanabe
すぐ試せる Raycastの推しポイント4選🚀 〜Raycast の AI 活用 & オマケ〜
ryunosukeheaven
0
300
Vue でサクッと作る: Studio でのプロトタイピング開発
ryunosukeheaven
1
3k
2023/05/18 STUDIO に GPT 入れてみた
ryunosukeheaven
2
3.8k
20201202_Port_Flutter_Firebase_Architecture
ryunosukeheaven
4
3.3k
Other Decks in Programming
See All in Programming
[Kaigi on Rais 2025] 全問正解率3%: RubyKaigiで出題したやりがちな危険コード5選
power3812
0
130
デミカツ切り抜きで面倒くさいことはPythonにやらせよう
aokswork3
0
230
Catch Up: Go Style Guide Update
andpad
0
220
Android16 Migration Stories ~Building a Pattern for Android OS upgrades~
reoandroider
0
110
CSC305 Lecture 03
javiergs
PRO
0
240
技術的負債の正体を知って向き合う / Facing Technical Debt
irof
0
170
The Past, Present, and Future of Enterprise Java
ivargrimstad
0
340
コードとあなたと私の距離 / The Distance Between Code, You, and I
hiro_y
0
160
Goで実践するドメイン駆動開発 AIと歩み始めた新規プロダクト開発の現在地
imkaoru
4
830
Go言語の特性を活かした公式MCP SDKの設計
hond0413
1
230
Flutterで分数(Fraction)を表示する方法
koukimiura
0
130
Foundation Modelsを実装日本語学習アプリを作ってみた!
hypebeans
0
110
Featured
See All Featured
Rails Girls Zürich Keynote
gr2m
95
14k
YesSQL, Process and Tooling at Scale
rocio
173
14k
Making the Leap to Tech Lead
cromwellryan
135
9.6k
Principles of Awesome APIs and How to Build Them.
keavy
127
17k
Put a Button on it: Removing Barriers to Going Fast.
kastner
60
4k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
252
21k
GraphQLとの向き合い方2022年版
quramy
49
14k
Leading Effective Engineering Teams in the AI Era
addyosmani
3
370
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
234
17k
Why You Should Never Use an ORM
jnunemaker
PRO
59
9.6k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
45
2.5k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
9
980
Transcript
High-Order Components Λͬͯ ࠶ར༻ੑ͕ߴ͍ίʔυΛॻ͘ ᬒ ཾ೭հ @HeavenOSK
ࣗݾհ • ᬒ ཾ೭հʢΘͨͳɹΓΎ͏ͷ͚͢ʣ • Twitter - @HeavenOSK • ༻ݴޠɿDart/Swift/Kotlin
• FlutterΤϯδχΞʢΤψ࣍ݩגࣜձࣾʣ
ຊ
High-Order Components ͬͯԿʁ
High-Order Components(HOC) • Reactʹ͓͚ΔɺίϯϙʔωϯτΛ࠶ར༻͢ΔͨΊͷςΫ χοΫ • https://reactjs.org/docs/higher-order-components.html • ίϯϙʔωϯτΛऔಘͯ͠ɺ৽͍͠ίϯϙʔωϯτΛฦ͢ ؔ
FlutterReactʹӨڹΛड͚͍ͯΔ • FlutterͷઃܭίϯϙʔωϯτࢦͰɺReactʹӨڹΛड ͚͍ͯΔ • https://flutter.io/docs/resources/faq#does-flutter-come-with-a- framework • Reactͷ։ൃςΫχοΫɺFlutterͰద༻Ͱ͖Δ߹͕͋Δ •
Redux…΄͔ • High-Order Components - HOCɺFlutterͰద༻Ͱ͖Δ
HOCΛͲ͏͍͍͑Μ ͩΖ͏
ը໘ͷྫΛݟͳ͕Βߟ͑ͯΈ ·͢
ը໘༷ • ઃఆը໘ • Ϧετܗࣜ • ϦετΞΠςϜҰͭʹର ͯ͠ɺҰͭͷઃఆ߲
ը໘༷ʢৄࡉʣ • શମColumn͔ListView • ֤ߦ • ࠨଆTextʢڞ௨ͷελΠ ϧʣ • ӈଆ৭ʑ
• ButtonɺSwitchɺText
HOCΛΘͣʹ࣮ͨ͠ ίʔυΛݟͯΈ·͢ https://github.com/HeavenOSK/flutter_high_order_components/ commit/d3a8f61617e87f3a81accc2b9fa414f3e0f0c3cf
1.όʔδϣϯ൪߸ͷߦ Widget _buildVersionNumberRow() { return Container( height: 70.0, child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween, children: <Widget>[ Text( 'όʔδϣϯ', style: _LabelTextStyle, ), Text( '1.0.0', style: _InformationTextStyle, ), ], ), padding: EdgeInsets.symmetric(horizontal: 12.0), decoration: BoxDecoration( border: Border( bottom: BorderSide( width: 1.0, color: _BorderColor, ), ), ), ); }
2.ΞϓϦ࿈ܞͷߦ Widget _buildApplicationConnectionRow() { return Container( height: 70.0, child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween, children: <Widget>[ Text( 'ΞϓϦ࿈ܞ', style: _LabelTextStyle, ), Switch( value: false, onChanged: (currentValue) {}, ), ], ), padding: EdgeInsets.symmetric(horizontal: 12.0), decoration: BoxDecoration( border: Border( bottom: BorderSide( width: 1.0, color: _BorderColor, ), ), ), ); } Մม
Մม෦͚ͩ
HOCͰڞ௨Խͯ͠ΈΔ https://github.com/HeavenOSK/flutter_high_order_components
• Container, Row, Textڞ௨ • ӈଆͷ෦͚͕ͩՄมͰʮԿ͔ͷWidgetʯ͕ೖΔ • FlutterͰʮ͕ͯ͢Widgetʯ • ͭ·ΓӈଆʹʮWidgetΫϥεͷԿ͔ʯ͕ೖΔ
• (WidgetΛδΣωϦοΫͳίϯϙʔωϯτͷܕͱߟ͑Δ) ϙΠϯτ
֤ߦΛग़ྗ͢ΔHOC Widget _buildSettingsListItem(String label, {Widget rightSideWidget}) { final children =
List<Widget>(); children.add( Text(label, style: _LabelTextStyle), ); if (rightSideWidget != null) { children.add(rightSideWidget); } return Container( height: 70.0, child: Row( mainAxisAlignment: MainAxisAlignment.spaceBetween, children: children, ), padding: EdgeInsets.symmetric(horizontal: 12.0), decoration: BoxDecoration( border: Border( bottom: BorderSide( width: 1.0, color: _BorderColor, ), ), ), ); }
ݺͼग़͠ଆͷίʔυ _buildSettingsList() { return ListView( children: <Widget>[ _buildSettingsListItem( 'ΞϓϦ࿈ܞ', rightSideWidget:
Switch( value: false, onChanged: (currentValue) {}, ), ), _buildSettingsListItem( 'όʔδϣϯ', rightSideWidget: Text( '1.0.0', style: _InformationTextStyle, ), ), ], ); }
HOCʹͨ݁͠Ռ • ίʔυͷ΄ͱΜͲͷ෦Λڞ௨ԽͰ͖ͨ • ίʔυ͕ಡΈ͘͢ͳͬͨ • Ͳͷ෦͕ڞ௨෦͔ɺՄม෦͔ҰͰ͔Δ • →ίʔυͷϝϯςφϯε͕͍͢͠
·ͱΊ • Flutterʹ͓͚ΔHOCʮWidgetΛऔಘͯ͠ɺ৽͍͠WidgetΛ ฦؔ͢ʯ • Flutterͷඪ४ϥΠϒϥϦͰɺHOCΑ͘ΘΕ͍ͯΔ • ContainerColumnͳͲͷίϯετϥΫλɺchild/ childrenҾͰWidgetΛऔಘͯ͠ɺ৽ͨͳWidgetΛฦ͢ HOC
• ϥΠϒϥϦ࣮͚ͩͰͳ͘ɺΞϓϦͷϓϩάϥϜͰͬͯ ͍͖͍ͨ
͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝ ·ͨ͠ ᬒ ཾ೭հ @HeavenOSK