Chen's blog
Swift, SwiftUI, tooling, app architecture, and the small product details that make software feel considered.
The problem While building a diagnostics tool, we shipped it as a single Pod containing only pure Swift code. The Swift code needed to call into a few system C library features — specifically, resolv.h from the …
Apple offers several persistence options, and UserDefaults and Keychain are the two you reach for most often in day-to-day app development. From past …
Drag the link below onto your Favorites Bar. The default click behaviour simulates navigation on the current page, and the destination URL is whatever you …
I’ve been tightening up my reading workflow lately, so here’s an update. The tools involved: DEVONThink Pro PDFExpert MarginNote (1) is the …
Original: Testing Swift code that uses system singletons in 3 easy steps Original author @johnsundell Most apps built on Apple platforms lean on …
Original: Avoiding singletons in Swift Original author & Copyright @johnsundell “I know singletons are bad, but…” — you hear it all the …
Original: Different flavors of dependency injection in Swift Original author & copyright: @johnsundell In previous posts we’ve looked at several …
A running list of the Mac apps I reach for. Every time I reinstall macOS, I forget to grab one or two of these and only notice once I actually need them (I …
What is LLVM? The secret behind Swift, Rust, Clang, and more Understanding how a compiler emits native machine code makes it dramatically easier to invent …
If your app ships on the App Store, in-app purchase (IAP) is something you can’t really avoid. Last year’s spat between WeChat tipping and …