Latest Writing

• SwiftUI Async Rendering Depends on the View Graph Shape

  OpenSwiftUI documents when hosted SwiftUI rendering can move work off the main thread

  2026年4月23日

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  • SwiftUI
  • OpenSwiftUI
  • AsyncRendering
  • ViewGraph
  • UIKit

• Host SwiftUI Views Directly in a CALayer with CAHostingLayer

  SwiftUI has a private CAHostingLayer SPI for embedding views at the CALayer level

  2026年3月21日

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  • SwiftUI
  • CAHostingLayer
  • CALayer
  • SPI
  • UIKit
  • AppKit
  • WebKit

• Debug NSUserActivity in SwiftUI with Hidden Logging Flag

  Enable _defaultSwiftUIActivityEnvironmentLoggingEnabled to debug Handoff, Spotlight, and userActivity issues

  2026年2月1日

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  • SwiftUI
  • NSUserActivity
  • Debugging
  • Handoff
  • Spotlight

• DebugReplaceableView and Swift 6.2's Multiple Type Erasers

  How Swift 6.2 enabled multiple @_typeEraser attributes for SwiftUI's new debug optimization

  2026年1月26日

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  • SwiftUI
  • Swift
  • Compiler
  • iOS26
  • TypeEraser
  • Debug

• static const in header cost: dyld ships with redundant 2KB data copy

  Analysis of how static const variables in header files create duplicated symbols in dyld, leading to unnecessary binary bloat

  2025年10月26日

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  • dyld
  • C++

• SwiftUI Transition Affects onAppear/onDisappear Call Order

  How transition types change the order of appearance callbacks

  2025年10月14日

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  • SwiftUI
  • Transition
  • onAppear
  • onDisappear