Swift 6.2' Approachable Concurrency is here for a while now, but do you fully understand it? If not, you'll be happy with this article from Nikita Vasilev.
Antoine van der SwiftLee
🇳🇱 #iosdev #iOS @wetransfer@mastodon.social
#swift blog: avanderlee.com
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Simulator enhanced: rocketsim.app
A first look at what I’ve been building: RocketTrace.
It turns dense Xcode Instruments traces into ranked, measured evidence, helping you focus your investigation and verify changes with a comparable run.
Private TestFlight invites will go out in small batches:
Maintaining existing Core Data code?
Use my open-source Core Data Expert Agent Skill to give your agent context on modeling, fetch requests, migrations, threading, CloudKit, and tests.
iOS developers: we're working on making your developer tooling even better.
You know RocketSim, you'll love the other two Rocket apps we'll release later.
Stay tuned ⏳
Syncing SwiftData across devices using iCloud sync? This article series by Thorsten Stark will be useful.
SwiftLee Weekly Issue 335 was sent to 31,212 subscribers with content from @johnsundell@mastodon.social, Anton Gubarenko, Mohammad Azam, RocketSim
async/await does not make work run off the main thread by default.
That mistake can still freeze your UI during real app work.
I explain how to avoid it in my free 5-day Swift Concurrency Playbook:
From "OSLog and Unified logging as recommended by Apple":
Create structured logging using OSLog and benefit from Xcode's debugging console using filters and colored logs.
From "Defer in Swift explained with Code Examples":
Learn how defer works in Swift, including execution order, cleanup use cases, and async defer support introduced in Swift 6.4.
https://www.avanderlee.com/swift/defer-usage-swift/?utm_source=mastodon
Use SwiftUI TabView for the main areas of your app, not for every navigation choice.
Tabs work best when they help users switch between primary views without losing the shape of the app.
My Swift Newsletter has a new landing page, what do you think?
If your project still relies on Core Data, give your agent better context before it edits persistence code.
My Core Data Expert Agent Skill is open-source and built for maintaining existing Core Data code.
An inspiring new iOS 27 framework, revealing 2 new app icons, SwiftData syncing and testing.
It's what's in tomorrow's SwiftLee Weekly:
https://swiftlee-weekly.com/tomorrow
I try to avoid teaching my AI agent the same project rules every week.
Agent Skills turn repeated prompts into reusable instructions you can share across tools.
I explain when I prefer skills over AGENTS.md:
Don't move, boss, keep those agents running 🙅♂️ 🐶
Claude, Codex, Cursor, they all have their own way of navigating the Simulator.
Yet, we still believe in a custom CLI + Agent Skill served through RocketSim.
Here's why:
https://www.rocketsim.app/blog/testing-ai-agents-ios-simulator/