Give your simulator superpowers

RocketSim: An Essential Developer Tool
as recommended by Apple

Issue 277
Jun 24, 2025

This week's SwiftLee Weekly covers:

  • ​Reverse-Engineering Xcode's Coding Intelligence prompt​
  • Speed up iOS Launch with fault ordering
  • Running the camera in Xcode's Simulator

Enjoy this week's SwiftLee Weekly!

THIS WEEK'S BLOG POST

​#Playground Macro: Running Code Snippets in Xcode’s canvas​

Xcode 26 introduces an integrated playground experience using the new #Playground macro. It's an absolute joy to experiment with your code right inside the editor. I've not been using Swift Playgrounds a lot, but I will use this new macro much more often!

SPONSORED

​Paywalls Made Easy – Superwall​

Huge apps like PhotoRoom, Mojo & Citizen use Superwall to build paywalls without shipping app updates. Learn how.

CURATED FROM THE COMMUNITY

​Why I’ve Filed Over 1,000 Apple Feedbacks — And Why You Should Too​

The weeks following WWDC are the best time to file feedback, but not the only time. I spoke with Eric at WWDC and asked him to write this article based on his experience of filing over 1,000 (!!) feedbacks. You’ll discover what attracts attention and which structure works best to ensure your feedback is valued effectively.
​linkedin.com​

​Adding Icon Composer icons to Xcode​

You’ve probably learned about the new Icon Composer app, but do you know how to use these app icons inside Xcode? It turned out not to be explained in the WWDC sessions, so this article is helpful!
​useyourloaf.com​

​Reverse-Engineering Xcode's Coding Intelligence prompt​

If you’re curious how Xcode 26 prompts AI, this article by Peter Friese is one you want to read!
​peterfriese.dev​

​Exploring a new visual language: Liquid Glass​

We have new APIs to explore, but also a new visual language to learn! This article by Create with Swift is an excellent overview, shares design principles, and even includes a Figma design file.
​createwithswift.com​

​FaultOrdering - Open source tool to speed up iOS app launch​

Emerge Tools is now part of Sentry, and the best outcome possible is happening now: they’re open-sourcing one of their tools. Companies like Airbnb and Spotify use this one to speed up their iOS app launch times.
​blog.sentry.io​

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.

CODE SNIPPET OF THE WEEK

New SwiftUI Modifier: Configuring a navigation subtitle

You can find this post on Twitter/X, LinkedIn, or Bluesky.

WHAT I'm WORKING ON

The beta release of Simulator Camera

Launched darkly, the latest version of RocketSim now supports simulating the camera inside Xcode's Simulator.

Ever since I started iOS development, I was surprised to not being able to test the camera on the Simulator. With RocketSim, I always dreamed to find a way to solve this for the community. Last month, I had a breakthrough and last week, I released the first version of this: Simulator Camera support!

You can read all about it inside the documentation or try it out yourself after downloading RocketSim from the Mac App Store.

Jay has been one of the first users to give it a try and posted about it on socials. If you're developing a camera app, this is a game changer for productivity.

This week, my focus is on integrating Sparkle to support out-of-the-App-Store distribution. This is requested by many large companies that don't allow installing RocketSim via the Mac App Store. Sounds easy, but quite the challenge with some edge-case implementations I have with RocketSim, ha!

Challenging week ahead!

​

{% if subscriber.rh_reflink != blank %}EARN ROCKETSIM LIFETIME

Share and Earn RocketSim Lifetime & a 1-on-1 coaching session

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:

​{{subscriber.rh_reflink}}
​​
Rewards:

  • Earn your first reward after just 3 sign-ups!
  • Check your progress anytime using your referral dashboard.
  • The grand prize? A personalized 1-on-1 career coaching session!

Several subscribers have already claimed their rewards—will you be next?{% endif %}

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

Antoine

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