Mastodawn

Also worth noting — OpenSwiftUI provides this API too. If you're using OpenSwiftUI, you can use CAHostingLayer directly via _spi import OpenSwiftUI without the extra swiftinterface workaround.
See #831 and #832 for more detail.

Kyle 2d ago

SwiftUI has a hidden CAHostingLayer API — host your SwiftUI views directly in a CALayer.
Currently used internally by UIKit/AppKit and WebKit. Available since iOS 18 / macOS 15.
I wrote a guide on how to access it without Apple's internal SDK 👇
https://gist.github.com/Kyle-Ye/8a7f12487a4ce2ca6ac9e087b09d4a20

Show thread

Kyle Aug 19, 2025

Here’s a sneak peek at the TOC I’m drafting for the article 👇

Kyle Aug 19, 2025

Anyone interested in how to quickly dive into and debug the internals of SwiftUI?
I’m planning to publish an article later this month about how I debug and fixed this issue
https://github.com/OpenSwiftUIProject/OpenSwiftUI/issues/461
Stay tuned—and let me know in the comments which parts you’d be most curious about!

Kyle Jul 29, 2025

If you can fully understand what the code in the screenshot is doing, I guess you can then call yourself as a truly SwiftUI engineer instead of SwiftUI developer. 👀

Kyle Jan 16, 2025

Looking for recommended resources (blog article/tutorial video/code snippet etc.) on kdebug for internal SwiftUI tracing research.

My current references: /usr/share/misc/trace.codes and xnu/bsd/sys/kdebug.h.

Suggestions appreciated!

Kyle May 5, 2024

Digging and fixing another OG crash case when implementing ViewModifier.
withUnsafePointer(x) will create a copy of x while withUnsafePointer(&x) will not.
Since &x is just an invalid pointer here, the former will crash.
https://github.com/OpenSwiftUIProject/OpenGraph/pull/71

Fix PointerOffset.offset implementation by Kyle-Ye · Pull Request #71 · OpenSwiftUIProject/OpenGraph

Close #70

GitHub

Kyle Apr 15, 2024

Joined as an intern on 2021, and today is my last day at ByteDance.
It’s been a pleasure working with so many creative engineers and designers.
And working with one of the largest mobile app codebase is definitely a challenge for me.
But I think I'll start my new life tomorrow.

Kyle Apr 7, 2024

Fun fact about APSL

What’s the point of $50 here?

> Thought it was an April Fool's joke at first glance.

https://opensource.apple.com/apsl/

License - APSL

Kyle Apr 7, 2024

Useless knowledge:
Learned how to demangle Swift symbol manually today.

> There is a tool named swift-demangle shipping with the toolchain. But sometimes it will be quicker if you master the basic skill :)