OpenSwiftUI next release preview: A new way to render to your app AppKit backed vs ??

Tip: you can also run RuntimeViewer on iOS or inject the dylib to any app you want to analyze. 🥳 Cheers for such amazing project.

OpenSwiftUI 0.12.0 release: - Add Xcode 26 SDK support - Add EnvManager support in Package.swift - Add Group/RepeatAnimation/View.alignmentGuide API support - Fixed various miscellaneous bug See full release notes in https://t.co/nlAmnpeVch #OSUI

It can have more Instrument data to analyze if you enable kdebug for SwiftUI. See detail on

See detail on

_renderForTest on HostingView lets us precisely control SwiftUI animations for testing. It’s already powering OSUI’s UI tests — thinking of releasing it as a Swift package if there’s interest. #OSUI

Also to note, if you can't reproduce the issue with a small Swift package. It is probably you forgot to specify platform. It will only cause issue if the target >= (iOS 13/macOS 10.15). By default it use $(arch)-apple-macos10.13 for Xcode 26.

When adapting OSUI for Xcode 26, I just found a lot of symbol conflicted with SUI. It turns out the root cause is OSUICore -> OSUI_SPI (C module) -> AppKit -> SUICore (conflict). Surprised that use #include <AppKit/AppKit.h> in one of my header will cause SUICore get imported.

How the default view style behavior differently on different environment(List/Form/Column)? The secret is StaticIf + StyleContext. By adding style context type information, the SUI engine can made a good decision on which style to use when building the tree before evaluate body.

OSUI 0.11.0 release: - Added ForEach support - Various fixes and improvements Big thanks to @_silgen_name and @dark_existed for their contributions 🙌 Release notes: https://t.co/UWvDglt4Hz

Swift on Android is becoming real! We’ve started working on bringing OpenSwiftUI to Android — contributions are welcome! Check for issues labeled "platform: Android" eg.

Reported to Apple as FB20820097.

Found a subtle C++ issue in dyld that wastes 2KB on the binary. In short, static const in headers = multiple copies of identical data = binary bloat Deep dive into the issue, solutions, and why it matters in this article ⬇️ https://t.co/2KkODCVlJc

https://t.co/ZlmayQxZFS

But such information still exists on the OS's dyld binary. So I maintain a fork to fix the missing versions. See more information on my fork. https://t.co/6WsQuBFdKZ

A sad story is that the latest AvailabilityVersions-155 still does not got its availability.dsl updated. So the open source dyld can't identify the latest OS(<dyld/VersionMap.h> and sVersionMap is outdated). Apple just stops updating the file since iOS 17.3 release somehow.

https://t.co/9bbvVqtaPM https://t.co/MWT1KDxehC

After a week of work, ForEach is now supported in OSUI! It’s been the most complex part so far. I’ve also written some docs — feel free to give it a try if you’re interested. #OSUI

This is by far the fastest turnaround I’ve ever seen for a bug I reported to Apple. Usually, fixes take several releases — or sometimes never got noticed. It’s truly impressive that this one went from report to fix and release in less than a month.

For the fix detail, you can check my updated article for it.