NCMB Study #9「iOS13」で発表したスライドです。
Qiitaで記事にもしています
(https://qiita.com/hirothings/items/4834481d170332e173f5)
参考資料:
WWDC video
https://developer.apple.com/videos/play/wwdc2019/214/
Human Interface Guidelines
https://developer.apple.com/design/human-interface-guidelines/ios/visual-design/dark-mode/
sample code
https://developer.apple.com/documentation/uikit/appearance_customization/adopting_ios_dark_mode