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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.
Read the articleLearn 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.
Learn moreAdd this directory to your Agents.md to enrich e.g. Cursor or Codex with iOS 26 specific features.
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!
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.
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!
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.
Last week's Swift proposal state changes. Review-stage proposals are your chance to influence Swift's future.
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!
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