Give your simulator superpowers

RocketSim: An Essential Developer Tool
as recommended by Apple

Issue 216
May 10, 2025

This week's SwiftLee Weekly covers:
  • A new SwiftUI content margins modifier
  • A way to incrementally adopt Swift Concurrency
  • Swift 6's access level on module imports
Furthermore, I'd love to create courses for you. Can you vote on either LinkedIn or Twitter, and tell me which of the three courses you would buy first?

Enjoy this week's SwiftLee Weekly!

THIS WEEK'S BLOG POST
While working on the next major release of RocketSim (Xcode Build Insights!), I've been solving a common problem: how to track events from within an isolated package? I developed RocketSim Insights in an isolated Swift Package and wanted to avoid creating a tracking package that I would add to all other packages. This week's article describes my solution using SwiftUI's @Environment property wrapper.

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CURATED FROM THE COMMUNITY
This article is full of little gems. Matt explains static vs. dynamic isolation, shares how you can incrementally adopt Swift Concurrency, while also making you feel better about guilty MainActor.run usages.
While it will still take a few months until Swift 6 arrives, there are already a few features we can try out. One of them are module import access levels.
Today, I learned about a new contentMargins modifier in SwiftUI. Thanks to Mecid!
The reduce operator comes in two variants, and I love picking the inout variant for cleaner code. Pol Piella explains how the operator works and how it can result in more performant code.
Custom fonts can make your app stand out, but you should not forget to add Dynamic Type support.

SWIFT EVOLUTION
An overview of last week's Swift Proposal state changes. Make sure to check them out when they're in review, as it's your opportunity to influence the direction of Swift's future.
Returned For RevisionSE-0430`transferring` isolation regions of parameter and result values
Active ReviewSE-0426BitwiseCopyable
ImplementedSE-0220`count(where:)`

QUESTION OF THE WEEK
This week's question comes from Trupti:

How did you upgrade your skill sets from beginner to intermediate and advanced levels in your career?

Growing from beginner to advanced levels is what many of you are likely doing as we speak. I started as a Junior iOS Engineer in the days of iOS 4.

I looked up to the seniors around me but tried never to feel intimidated.

They were my golden ticket to progression; I could learn a lot, but only if I stood up, asked questions, and actively took responsibility.

3 important, impactful decisions made me grow from Junior to Staff Engineer over the years.

1. Agency work
I was able to build & lead projects solely. After a few months, the project was finished, and I would start a new project.

The new project allowed me to redo what I did wrong previously. Each project allows for iteration and improvements.

2. Product work
WeTransfer’s products required me to work in a team together with other seniors. They leveled me up, increased expectations, and created accountability.

Having skilled people around you will drastically improve your skills.

3. Side projects
Side projects are a great way to safely learn and make mistakes without negatively impacting colleagues or companies. 


Finally: 
  • Try to learn something new every day
  • When bored, seek new challenges
  • Switching jobs when bored is hard, but often the best way to grow

Want to have your question answered next week? Ask your question on LinkedIn or Twitter.