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SwiftLee Weekly by Antoine van der Lee

SwiftLee Weekly - Issue 250

Published 29 days ago • 5 min read

This week's SwiftLee Weekly covers:

  • Noncopyable types in Swift
  • Exploring MLX Swift
  • Xcode Library Customization

Enjoy this week's SwiftLee Weekly!

THIS WEEK'S BLOG POST

​SwiftUI Button: Custom Styles, Variants, and Best Practices​

SwiftUI provides different APIs to style buttons. You can use system styling using view modifiers or custom button styles. While writing this article, I learned about PrimitiveButtonStyle, which allows you to define both custom interactions and styling.

New: Code for this week's article can be found on GitHub. I've started this repository to invite you to contribute new article ideas or feedback on existing articles.

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CURATED FROM THE COMMUNITY

​Noncopyable types in Swift​

While I haven’t run into a situation of needing noncopyable types myself, there are cases where this Swift feature can be essential to prevent invalid states or conflicts. Well explained by Natalia Panferova.
​nilcoalescing.com​

​Finding unused code with Periphery​

Unused code is tech-debt you need to maintain while it’s wasted time. “it’s difficult to prune old unused code while keeping up the velocity of new features”, well said by Adam Wulf. The tool described in this article can help you clean up your codebase.
​adamwulf.me​

​Exploring MLX Swift: Adding On-Device Inference to your App​

Do you know what MLX stands for? It’s a machine learning framework by Apple specifically designed for Apple Silicon. Read this article by Rudrank if this sparks your interest.
​rudrank.com​

​Xcode Library customization with SPM plugin​

While many of us only use SPM to link packages, you can do much more. This article describes creating an SPM plugin that generates library content. Oh, and this article also reminds us of the LibraryContentProvider protocol, which is very interesting!
​artemnovichkov.com​

​Understanding opaque types in Swift​

I wrote about Opaque types before and even gave a few talks since it’s complex for many. This concise article by Natascha Fadeeva might help you better understand this topic.
​tanaschita.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.

There have not been any state changes in the past 7 days.

QUESTION OF THE WEEK

“
What objectives might a Principal Engineer's role be asked to endorse?
— Robin

Before I went indie in March this year, I had been a Staff iOS Engineer for 7+ years at WeTransfer. While the Principal level follows after, there's one thing both levels had in common: confusion about responsibilities.

I've seen senior developers struggling to be promoted to Staff, switching jobs, and getting hired as Principal Engineer. One company might qualify you as a Principal, while others feel like you're just starting.

I'd love to reference staffeng.com in this answer as it helped me to qualify the different Staff engineers we've had at WeTransfer. While it does not answer the question, it does inform you of the various types of Staff Engineers that exist at these levels.

A principal engineer typically operates at a strategic level, influencing technical direction, mentoring teams, and ensuring alignment between business goals and engineering solutions. This is a continuation of a Staff Engineer's responsibilities, and there are often just a few Principal Engineers who are divided by discipline and aim to work together.

If you’re aiming for a Principal Engineer position, start by familiarizing yourself with the role. Review job postings from various companies to understand what they value and expect from candidates in this position.

Want to have your question answered next week? Ask your question via this form (anonymously) or reply to this email with your question.

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

Antoine

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