Hi, I’m Ole. I’m a developer from Berlin and co-author of Advanced Swift. Here, I mainly write about Swift and app development on Apple platforms. More about me.

1. Building with nightly Swift toolchains on macOS

   An overview of the various options you have for selecting the Swift toolchain you want to build with, and two caveats to be aware of. More >

   March 5, 2024

2. How the Swift compiler knows that DispatchQueue.main implies @MainActor

   I found the place in the compiler’s source code where it applies a special attribute to DispatchQueue.main.async closures. Plus, a rant about how Xcode presents Swift concurrency context to the programmer. More >

   February 29, 2024

3. How the relative size modifier interacts with stack views

   The relative sizing modifier interacts in an interesting way with stack views and other containers that distribute the available space among their children. Understanding why can teach us a lot about SwiftUI’s layout algorithm. More >

   March 24, 2023

4. Working with percentages in SwiftUI layout

   A SwiftUI layout and view modifier for relative sizing. “Make this view 50 % of the width of its container”. More >

   March 23, 2023

5. Keyboard shortcuts for Export Unmodified Original in Photos for Mac

   A shell script that assigns a keyboard shortcut to the Unmodified Originals menu command in Photos on the Mac. More >

   March 21, 2023