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SwiftLee Weekly by Antoine van der Lee

SwiftLee Weekly - Issue 337

Published about 2 months ago • 4 min read

This week's SwiftLee Weekly covers:

  • ContentBuilder in SwiftUI
  • Headless Xcode 27 MCP
  • iOS 26' DataDetector

Enjoy this week's SwiftLee Weekly!

THIS WEEK'S BLOG POST

​Swift Testing explained with code examples​

Are you yet using Swift Testing? Apple continued to improve the framework and I barely touch XCTest anymore. Here's an update on all the latest.
​avanderlee.com​

SPONSORED

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Are you tired of Ruby and Fastlane installation issues? There's got to be a better way! Discover Codemagic open source CLI tools. It is not a drop-in replacement for all of what Fastlane does (screenshots for example), but we use it at Codemagic to build and publish iOS and Android apps, also versioning and device provisioning. View on GitHub.

CURATED FROM THE COMMUNITY

​iOS 26: DataDetector​

NSDataDetector, we've been friends in the past! It's so nice to see a modern replacement for this and Anton Gubarenkoshares all the details.
​antongubarenko.substack.com​

​Unit Testing Navigation Logic In Swiftui​

Unit testing navigation logic is always challenging, even more so in SwiftUI. Mohammad Azam explains how you can make use of a router to make navigation testable.
​azamsharp.com​

​Headless Xcode: From Prompt to Simulator with MCP​

Big news for iOS devs in one of the latest Xcode 27 beta releases. Artem Novichkov explains what headless Xcode MCP server access means for you when working with agents.
​artemnovichkov.com​

​Creating multi-step animations with PhaseAnimator in SwiftUI​

A simple SwiftUI animation might be doable, but what if you want a sequence of steps? This technique by Natalia Panferova works for that.
​nilcoalescing.com​

​ContentBuilder Explained - The Secret Behind SwiftUI's Type-Checking Speedup​

New in SwiftUI: ContentBuilder. Or well, it's actually not: it's just a typealias. But it's still a powerful change?! I know, this sounds confusing, but Fatbobman explains why there is a big reason to consider using it.
​fatbobman.com​

SWIFT EVOLUTION

An overview of last week's Swift Proposal state changes. Check them out when they're in review, as it's your opportunity to influence the direction of Swift's future.

WHAT I'M WORKING ON

Inviting the first beta users to RocketTrace

Last week, RocketTrace finally got approved. It turned out that my TestFlight build had a unique combination of entitlements that blocked it from going through. It uses an XPC-standalone companion app and other living-on-the-edge features to let you run Xcode Instruments directly on a physical device.

Getting unblocked on TestFlight also means I can finally onboard the first beta users. I’m doing this in waves, so I can pay full attention to any new users and fix issues along the way. Last week’s beta approval allowed me to invite several friends, who already provided great feedback.

Rolling out new apps is exciting, and you want to make sure they work ‘in the wild’ before rolling them out to your biggest audience. You might only get one chance to convince a user, so it better be good. Hence why I’m rolling it out in waves.

f you haven’t yet, make sure to sign up for the beta waitlist. And if you’re curious, here’s what recording in RocketTrace on a physical device looks like:

video preview​

UNTIL NEXT TIME

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Thank you so much for your support, and until next Tuesday,

Antoine

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Swift Evolution updates, 5 top community articles covering Swift development topics.

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