_VariadicView: Highlighting the Hidden Powers of Containers
summary
The talk examines creating custom SwiftUI container views and why Apple's public APIs (ViewBuilder, TupleView, Group) fall short for intuitive containers. It explains how VStack is implemented using the semi-private _VariadicView API, shows examples from SwiftUI swiftinterface files, discusses production safety, and demonstrates a sample implementation plus how iOS 18 addressed the issue. The talk ends with practical use cases like custom containers for design systems.
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chapters (9)
- 0:00Introduction
- 2:10Custom container problems
- 7:25ViewBuilder and TupleView
- 13:10Hidden SwiftUI APIs
- 17:27VariadicView implementation
- 21:21Data passing in ViewTrade
- 25:01App Store acceptability
- 28:59iOS 18 new features
- 31:25Practical applications
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