profile

SwiftLee Weekly by Antoine van der Lee

SwiftLee Weekly - Issue 291

Published about 1 month ago • 4 min read

This week's SwiftLee Weekly covers:

  • Next-level Xcode Simulator recordings
  • Additional iOS 26 documentation for Agents.md
  • Swift Package Manager traits

Enjoy this week's SwiftLee Weekly!

THIS WEEK'S BLOG POST

​Derived Data: 5 Things iOS Developers Do Wrong​

It's one of the most important directories when it comes down to development with Xcode: The Derived Data folder. Some of you might know all about it, some will hear about it for the first time in this newsletter. I've explored it quite a bit during my career and while developing RocketSim, so it's time to prevent you from the most common mistakes.

SPONSORED

​Product for Engineers newsletter​

Learn to build better products, not just better code. Learn how to talk to users, build features they love, and find product market fit. Subscribe for free for lessons (and mistakes) from building PostHog and other top startups.

CURATED FROM THE COMMUNITY

​Xcode 26’s Additional Documentation for Agents​

Add this directory to your Agents.md to enrich e.g. Cursor or Codex with iOS 26 specific features.
​x.com​

​Structuring universal links in iOS​

I always find it an interesting challenge to parse and handle deeplinks/universal links well. In this article, Natascha Fadeeva shares her way of managing these. Make sure to use this tool to test them!
​tanaschita.com​

​Accessing Swift Package Manager dependency versions at runtime​

What if you want to show the exact version of a 3rd party dependency you’re using? The technique described in this article can help.
​annema.me​

​All about Swift Package Manager Traits​

Swift Package Manager traits are new since Swift 6.1 and allow you to turn package features on and off. This can be useful to conditionally enable features, something I’ve at least been looking for in the past!
​theswiftdev.com​

​How to hide a view in a screenshot​

What if someone creates a screenshot while your app is active, showing sensitive data? Vincent Pradeilles shares an API that allows you to hide views on screenshots.
​swiftwithvincent.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

Next-level Xcode Simulator Recordings

Xcode's Simulator allows you to create recordings, but it still lacks quite a few features that you would expect:

  • No way to add device bezels
  • Audio is not recorded
  • It's always a squared output, without a beautiful background
  • Touches are never displayed on recordings
  • The output resolution does not look great on socials

For years, RocketSim improved this experience. Yet, this week, I'm pushing the boundaries to another level.

​Check the demo video on LinkedIn → (You'll love Touch Attention Mode)

Oh, and while you're there, make sure to give my LinkedIn profile a follow: linkedin.com/in/ajvanderlee/​

I'm ramping up the content that I share on LinkedIn, including rich content like this.

Either way, RocketSim's next release is being reviewed, so make sure to download it from the App Store so you'll get these advanced recording capabilities later this week!

​

EARN ROCKETSIM LIFETIME

Share and Earn RocketSim Lifetime & free Swift Concurrency Course access

Apple has recognized RocketSim as an Essential Developer Tool in the Mac App Store, and now you can get lifetime Pro access by sharing your unique referral link!
​​
How to get started:

​[RH_REFLINK GOES HERE]
​​
Rewards:

Several subscribers have already helped me reach more developers and gained free access to RocketSim Pro and my Swift Concurrency Course — will you be next?

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

Antoine

Thanks for being a SwiftLee subscriber!
​
All my content is available to you for free. Like what I do and want to support me?
​Buy me a coffee or try RocketSim, an Essential Developer Tool as recommended by Apple.

This newsletter is built with Kit.
Need my experience? Book a 1:1 with me.

​

You're receiving this because you signed up for SwiftLee Weekly. If you'd prefer not to hear from me, you can manage your preferences here.

SwiftLee Weekly by Antoine van der Lee

Join 27K+ iOS Developers who get weekly updates on Swift & SwiftUI.

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

Read more from SwiftLee Weekly by Antoine van der Lee

This week's SwiftLee Weekly covers: Simulator Camera Testing A goodbye to a long running conference Optimize the performance of your SwiftUI app Enjoy this week's SwiftLee Weekly! EARLY BLACK FRIDAY ACCESS Your exclusive SwiftLee discount ends tonight As a SwiftLee Weekly reader, you’re getting early access to Black Friday discounts—before anyone else. Don’t miss your chance to grab your favorite at a special price. Early access bundles: The Courses Bundle ($228, now $112)Going Indie + Swift...

3 days ago • 5 min read

This week's SwiftLee Weekly covers: Xcode Build Performance Analysis Swift for Android WWDC APIs timeline But also: an early exclusive Black Friday discount for you as a SwiftLee Weekly subscriber. Enjoy this week's SwiftLee Weekly! THIS WEEK'S BLOG POST Build performance analysis for speeding up Xcode builds Build performance—is it still a thing to look at nowadays? Yes, Xcode build times improve every year at WWDC, but my experience is that builds still become slower over time. Especially...

10 days ago • 6 min read

This week's SwiftLee Weekly covers: Glass Views & Animations Singletons & Swift Concurrency Structured experiments Enjoy this week's SwiftLee Weekly! THIS WEEK'S BLOG POST SwiftUI Architecture: Structure Views for Reusability and Clarity I often find myself restructuring views after time happened and ContentView became too large. The techniques I've learned over the years are explained in this week's blog post. For those that are more visually oriented, I've also published a video for this...

17 days ago • 5 min read