Have a look at this function: func f(_ closure: (() -> Void)? = nil).

Would you say that the optional closure is escaping or not?

Last week I’ve told you about the advanced features of breakpoints in Xcode, and this week I want us to stay on the topic of little-know features in Xcode!

This time we’re going to talk about multiple cursors and how they enable us to quickly edit repetitive pieces of our code.

Nobody wants to spend their day adding breakpoints here and there, to try and piece together the reason why something is not working as it should.

So I want to walk you through the advanced features of breakpoints in Xcode: this way the next time a sneaky bug comes along you’ll be well equipped to track it down fast 😌

Memory leaks can cause a lot of damage and they are often very hard to fix 😔

That’s why I want to show you a nice little trick that will let you write tests that can detect memory leaks!

Have you heard of a new feature of Swift called Parameter Packs?

I want to show you a use case where they really shine!

SwiftUI feels like a pretty safe approach to build your app’s UI, doesn’t it?

But did you know that a small syntax error has the potential to completely crash your entire app?

Last week I’ve released a video that I was really excited about, because it focused on a topic that I had never really covered on my channel until then: How to optimize the performance of iOS apps!

The video was received very positively, so I figured that it could be worth it if for this week’s email I wrote an outline of all the tricks!

During the summer, I shared with you my training courses to learn SwiftUI or Combine in a short amount of time.

I felt that the next logical topic to address was Swift Concurrency, because in the two years since its release, it has really become the standard for asynchronous code in iOS apps.

But this time I added a twist to the formula!

Last week I ran a poll on Twitter and LinkedIn.

Out of almost 500 votes, a short majority was thinking that calling the method .removeLast() on an empty Array would return nil.

But of course, I asked that question because there is definitely something more to it than what seems to be the straightforward answer 🙃

That’s it, Xcode 15 Release Candidate has been available since the middle of last week!

This means that we can now start using the new features of Swift 5.9 in production, including Swift Macros 🥳

So here’s a list of 3 Macros from the community that you can start using today!

If you’re like me, you might have been a bit disappointed by the lack of any new AI-based feature that helps developers write code in Xcode 15.

That lack of an AI feature is even more frustrating when you know that it’s been more than 2 years since Microsoft has released Copilot 🥲

But did you know that it’s actually possible to use Copilot with an Xcode project?

You’re probably aware that Apple’s September keynote will be taking place on the 12th.

This means that it is now a matter of days before the official release of Xcode 15, and along with it the release of Swift 5.9!

So how about we prepare for it by going over 3 features that this new version of Swift will add to the language?

WWDC 2023 had a lot of cool announcements, but there’s one I’m sure no one expected: the release of a new iOS framework called TipKit!

So what is TipKit all about?

The goal of TipKit is to make it as easy as possible for developers to display short contextual information that highlights or explains a feature of their app.

Since the end of 2021 I’ve been teaching private SwiftUI training sessions for a few French companies.

Their feedback was pretty positive, so last spring I decided to record this training course through a series of free livestreams on YouTube.

(and if you’re wondering about the price, it’s available entirely for free!)

I’m sure you already know about retain cycles and how they can be broken by capturing a weak reference to an instance.

You might have also heard that, instead of a weak reference, you can also capture an unowned reference.

And you might have even heard that unowned reference are a bit more optimized, but also a bit more risky.

Last June, a French company hired me for a private training session focused on SwiftUI and Combine.

This lead me to prepare some training material on Combine and I figured why not make it available to everyone?

One of the benefits of spending a lot of time on Twitter (or is it X now? 🤔) is that I see a lot of iOS folks share super useful tips!

So I went through my bookmarks and made you a list of the 5 most useful tips I’ve found 🙌

This week we’re talking about tooling 🛠️

The iOS community is known for releasing amazing content and open-source tooling make no exception to that rule!

So let me show you 5 tools that can really help improve your iOS project!

In today’s email, we’re going to talk about a tricky question that iOS developers are bound to ask themselves regularly:

“Should I use [weak self] in this closure?”

To answer this question, we’ll go over a few examples. And as you’ll see, the answer is not always as clear cut as it seems!

I’ve recently stumbled upon an amazing website that basically lists all the tips and tricks you can use to make the most of Xcode 😌

So I really recommend you go check that website! And in the mean time, here’s a list of 5 tips that you can start using today!