Swift ✉️ Memos

How to use AI to improve your iOS skills

Hi 👋

In this email, I want to show you a clever trick to discover new useful iOS coding patterns with the help of AI.

(spoiler alert: this approach did make me discover an interesting pattern that I had never seen before!)

But first, I have a big thank you to the developer tool who's the sponsor of this email: Alex Sidebar

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So what's the setup?

I've downloaded the codebase of Signal, a popular open-source iOS app.

Then I've opened the project inside Cursor, which is an IDE integrated with Claude and ChatGPT.

Cursor has a really nice feature: it allows you to chat with your codebase.

So I'm going to use this feature to ask the AI to find in the codebase something that would help an iOS developer improve their skills:

The first answer wasn't amazing: the AI mentioned how views and view controllers can be initialised programmatically.

It's perfectly correct, but it's also very likely that an iOS developer with a bit of experience will already be aware of it:

But don't let that first answer stop you!

Asking the AI for another example might yield a much better result.

On a second try, the AI showed me how to use the property observer didSet to make sure that the cornerRadius of a CircleView always gets updated when either its frame or bounds changes:

And on the third try, the AI even showed me a pattern that I had never seen before: using the property observer willSet to trigger a runtime error during development when an inherited property is mistakenly set:

(notice how the AI incorrectly uses the term property wrapper, even though it's actually a property observer that's being used here!)

I hope that you've enjoyed discovering this clever usage of AI!

If you want to give it a try for yourself, you can find lists of open-source iOS apps here and here.

And if you want to see it in action, I've also made a video:

That's all for this email, thanks for reading it!

If you've enjoyed it, feel free to forward it
to your friends and colleagues 🙌

I wish you an amazing week!

❤️