# SwiftUI

> WWDC2019에서 발표한 선언적/리액티브 UI 프레임워크. macOS, iOS, iPadOS, watchOS 코드를 동일한 방식으로 작성할 수 있다.

WWDC2019에서 발표한 선언적/리액티브 UI 프레임워크. <macOS>, [iOS](https://wiki.g15e.com/pages/iOS.txt), <iPadOS>, <watchOS> 코드를 동일한 방식으로 작성할 수 있다.

> Declare the user interface and behavior for your app on every platform.

https://developer.apple.com/documentation/SwiftUI

## 특징

- <single source of truth>
- declaration of intention and roles
- (mostly) one way data flow

큰 틀에서 <Svelte>, [React](https://wiki.g15e.com/pages/React.txt), <Elm> 등 주요 웹 프론트엔트 프레임워크와 유사하다. 다만 "Declaration of intention and roles" 부분이 뛰어난데, 웹의 경우 테일윈드 광풍 등으로 인해 이 부분이 크게 훼손되어 있다.

## Articles and videos

- [Introducing SwiftUI: Building Your First App (WWDC2019)](https://developer.apple.com/videos/play/wwdc2019/204): SwiftUI를 처음 소개한 영상
- [Introduction to SwiftUI (WWDC2020)](https://developer.apple.com/videos/play/wwdc2020/10119): 위 영상과 거의 완전히 동일한데 회의실 앱 대신 샌드위치 앱
  - 그 밖에도 Widget, Complication (<watchOS>) 등이 추가됨
- [Data essentials in SwiftUI (WWDC2020)](https://developer.apple.com/videos/play/wwdc2020/10040)
- [Discover concurrency in SwiftUI (WWDC2021)](https://developer.apple.com/videos/play/wwdc2021/10019/)
- [Demystify SwiftUI (WWDC2021)](https://developer.apple.com/videos/play/wwdc2021/10022/)
  - Identity, lifecycle, dependency graph 등을 자세히 설명
- [SwiftUI essentials (WWDC2024)](https://developer.apple.com/videos/play/wwdc2024/10150/)

## Changes

- [Introducing SwiftUI: Building Your First App (WWDC2019)](https://developer.apple.com/videos/play/wwdc2019/204): SwiftUI를 처음 소개한 영상
- [What's new in SwiftUI (WWDC2020)](https://developer.apple.com/videos/play/wwdc2020/10041)
  - Scene API를 추가하여 (어지간하면) 전체 앱을 SwiftUI만으로 만들 수 있게 함
  - 그 밖에도 Widget, Complication (<watchOS>) 등이 추가됨
- [What's new in SwiftUI (WWDC2021)](https://developer.apple.com/videos/play/wwdc2021/10018/)
  - 2019년이 Declarative UI, 2020년이 100% SwiftUI Apps라면, 2021년의 주제는 "Deeper adoption"이라고 말함.
  - [Swift](https://wiki.g15e.com/pages/Swift%20(progrmaming%20language.txt))에 새로 추가된 `await`을 활용한 비동기 API들이 추가됨.
- [What's new in SwiftUI (WWDC2022)](https://developer.apple.com/videos/play/wwdc2022/10052/)
  - Swift Charts 추가 (Observable Plots와 유사.)
  - Data-driven navigation API 추가
  - MenuBar API 추가
  - Custom Layout API 추가
- [What's new in SwiftUI (WWDC2023)](https://developer.apple.com/videos/play/wwdc2023/10148/)
  - ImmersiveSpace scene 등 visionOS 관련 API 추가
  - MapKit, Swift Charts 등 개선
  - ObservableObject 대신 Observable macro 도입. 참고: [Discover Observation in SwiftUI (WWDC2023)](https://developer.apple.com/videos/play/wwdc2023/10149/)
  - [SwiftData](https://wiki.g15e.com/pages/SwiftData.txt) 추가
- [What's new in SwiftUI (WWDC2024)](https://developer.apple.com/videos/play/wwdc2024/10144/)
  - ControlWidget 지원 추가
  - MeshGradient 지원
  - New symbol effects
  - Custom containers

## See also

- [SwiftData](https://wiki.g15e.com/pages/SwiftData.txt)