Douglas Hill’s recent posts

22 October 2025

That’s some long overdue cleanup. Ask your parents about Default-568h@2x.png.

Screenshot of a GitHub pull request. Title: Remove Default-568h@2x.png. Commits: 1. Files changed: 4. Comment: You used to have to add these files to support the iPhone 5. Remember that? »

16 October 2025

We’ve released an early preview of our new AI Assistant, which uses Apple Intelligence to answer questions about PDF documents. This is using Apple’s Foundation Models, so documents and questions are processed on the device without being sent anywhere. Try it on TestFlight (iPad/iPhone only). »

8 October 2025

SwiftLeeds day 2

Photo of Adam on stage at the conference with some guy sketchnoting on screen behind.

Photo of Sash on stage at the conference.

Photo of Oksana on stage at the conference. Slide says “But at workæ 10 year old project, VIPER, Storyboards”.

Photo of Ekaterina on stage at the conference. Title is “I am not here by mistake”. »

7 October 2025

SwiftLeeds day 1

Photo of Adam on stage at the conference.

Photo of Daniel on stage at the conference. Slide says “Be here”.

Photo of Adam introducing Chris on stage at the conference.

Photo of Cyril on stage at the conference sitting using lldb in a demo. »

5 October 2025

Now I’m in Paris catching up with some Swift Connection people but confusingly not attending this conference, because I’ll take the train onwards to the UK tomorrow for SwiftLeeds. Both are quite nice conferences. »

I was lucky to be in Tirol for the ski season opening on Friday!

Photo of snow on mountains with ski runs and lifts. Rocky ground not covered with snow in places. Blue sky above. »

2 October 2025

The schedule for Pragma conference just went up. Looks fabulous. Looking forward to it! (I’ll be taking the train down through the French Alps. The Paris-Milan route reopened this year after a landslide in 2023.) »

1 October 2025

We’re hosting an NSLondon pub evening tomorrow in conjunction with the Server-Side Swift Conference. Sign up on Meetup or just turn up. (I’m away but back in the UK next week for SwiftLeeds.) »

12 September 2025

Our PDF Viewer update for iOS 26 and macOS 26 is out on Apple’s app store. It’s glass time. »

11 September 2025

Update of our PDF SDK ready for the new design on iOS 26 is out. Hard designing for Liquid Glass without having many examples of other apps yet. It was an amazing team effort getting this out during our company retreat! Read more in the Nutrient iOS SDK 26 release notes. »

23 August 2025

On iOS 26, I don’t understand how having every toolbar button jiggle when navigating between screens helps “bring focus to the underlying content”. »

22 August 2025

Excited about this new book. The sequel to my favourite book of last year.

Photo of spines of two books: Dinner by Meera Sodha on top of East by Meera Sodha »

We’re running another NSLondon coffee and code morning tomorrow. Meet at 11 at WatchHouse Marble Arch by Hyde Park. I’ll be there. »

21 August 2025

For some reason, Xcode 26 beta is reverting our swiftpm/Package.resolved file from the version 3 format to version 1. I guess it‘s fine, just annoying diff noise as the whole file changes. I’m concerned it‘s going to want to go back to version 3 next week. »

We released Nutrient iOS SDK 14.12 (formerly PSPDFKit). The release notes aren’t really about this release, but instead about what’s happening next month. Apple’s big UI update needs navigating carefully, as using the wrong version of Xcode will lead to trouble. »

Trying to use dictation more at work to give my wrists a break, but end up with nonsense like “Revenue cat five switches to stalk it too”. (It’s about this.) »

20 August 2025

I wrote a detailed article reviewing the range of NotificationCenter APIs (selector, closure, Combine, async sequence), leading up to MainActorMessage and AsyncMessage. Also covers some API design considerations and bridging between messages and notifications. »

We have a new blog post from Shadrach going deep with new App Intents API in iOS 26 for interactive snippets, which can used to add steps in Shortcuts that dynamically receive input from the user. »

19 August 2025

Had to look up a thing in a project in CLAUDE.md because it was more comprehensive than README.md. Humans usability is now a secondary concern. »

7 August 2025

Today’s lesson: With Foundation Models, use the same beta of Xcode and iOS. Any use of tool calling using Xcode 26 beta 4 running on iOS 26 beta 5 crashes at launch with dyld: Symbol not found: _$s16FoundationModels16GeneratedContentV10propertiesACs13KeyValuePairsVySSAA013ConvertibleTocD0_pG_tcfC. »