iiinova — where your digital self keeps evolving

Vincent Pradeilles @v-pradeilles.bsky.social · 55m

It's truly impressive how coding agents can now build quite complex iOS features pretty much autonomously! Last month I had to create several prototypes at work, so I've made a video to show you what I was able to achieve using Astra and Codex. www.youtube.com/watch?v=FXK...

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Vincent Pradeilles @v-pradeilles.bsky.social · 12/10/2026

New in Xcode 27.1: If you hold the Option ⌥ key, you'll reveal a slider that lets you precisely control the hinge angle of the iPhone Duo

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Vincent Pradeilles @v-pradeilles.bsky.social · 09/10/2026

Corner radius can be asymmetric on the iPhone Duo, the Concentricity APIs introduced in iOS 26 allows you to manage that 😌

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Vincent Pradeilles @v-pradeilles.bsky.social · 08/10/2026

Don't update the ID of a model every time a View is evaluated 🙅🏽‍♀️🙅🏻‍♂️ This an official bad practice written by Apple in Xcode 27 coding skills

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Vincent Pradeilles @v-pradeilles.bsky.social · 07/10/2026

Safe areas are now asymmetric on the iPhone Duo, so be careful if your app has code that assumes symmetry 🫣

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Vincent Pradeilles @v-pradeilles.bsky.social · 02/10/2026

New in Xcode 27.1: there's a new Simulator that lets you test how your app behaves on the iPhone Duo in all the new layout configurations

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Vincent Pradeilles @v-pradeilles.bsky.social · 01/10/2026

If you're using Claude Code, Codex or Cursor to prototype for the iPhone Duo, make sure to run this command, with the argument underlined in red Because Xcode 27.1 ships with updated coding skills that specifically detail how to handle app resistibility for the iPhone Duo

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Vincent Pradeilles @v-pradeilles.bsky.social · 01/10/2026

Don't directly observe a property or an element of a large data structure 🙅🏽‍♀️🙅🏻‍♂️ This an official bad practice written by Apple in Xcode 27 coding skills

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Vincent Pradeilles @v-pradeilles.bsky.social · 30/09/2026

New in iOS 27.1: the .onHingeChange() API lets you implement effects that are synchronized with the current state of an iPhone Duo's hinge

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Vincent Pradeilles @v-pradeilles.bsky.social · 30/09/2026

New in Xcode 27.1: there's an updated coding skill to help automate adapting your app for the iPhone Duo

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Vincent Pradeilles @v-pradeilles.bsky.social · 29/09/2026

Each time you use a ForEach inside a lazy container, there's a chance that your code is written in a way that prevents SwiftUI from optimizing it. Fortunately, Xcode makes it quite easy to diagnose and fix the issue! Here's what you need to know 😌

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

Xcode 27.1 comes with an updated coding skill to help automate adapting your app for the Duo

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

If you want to build your own bars, the new ReservedRegion API lets you avoid areas like the cameras or the status indicator

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

Safe areas are now asymmetric, so be careful if you have code that assumes symmetry

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

If needed, you can opt-in a TabView to display as a sidebar when unfolded

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

TabView will automatically move its controls to the side, to maximize screen real estate available for your content

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

NavigationSplitView will automatically collapse the navigation stack when folded and expand it when unfolded

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

Setting UIRequiresFullScreen might result in a weird look when the user starts multi tasking

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

Corner radius can be asymmetric on the Duo, the Concentricity APIs introduced in iOS 26 allow you to manage that

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

The easiest way to adapt your app to the Duo is to rely on size classes

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

Xcode 27.1 comes with a new Simulator that lets you test how your app behaves in all the new layout configurations.

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

And once you build against the new iOS 27.1 SDK, your app will look fully at home on the Duo

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

However, building against the iOS 27 SDK dramatically improves things

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

Apps built against SDKs that predate iOS 27 will look really bad on the Duo

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Vincent Pradeilles @v-pradeilles.bsky.social · 28/09/2026

I've watched the Apple session "Prepare your app for iPhone Duo", here's what you need to know 🧵

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Vincent Pradeilles @v-pradeilles.bsky.social · 19/08/2026

Xcode 27 ships with updated coding skill in each new beta. So if you use these skills outside of Xcode, make sure to re-export them, with the option `--replace-existing` 😌

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Vincent Pradeilles @v-pradeilles.bsky.social · 18/08/2026

Don't store rapidly changing values in the Environment 🙅🏽‍♀️🙅🏻‍♂️ This an official bad practice written by Apple in Xcode 27 coding skills

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Vincent Pradeilles @v-pradeilles.bsky.social · 17/08/2026

New in Swift: Thanks to the alignment of OS version numbers, there's now a blanket statement to refer to all of them at once.

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Vincent Pradeilles @v-pradeilles.bsky.social · 13/08/2026

You probably know that SwiftUI supports Markdown. But did you know that Markdown links are way more powerful than they seem?

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Vincent Pradeilles @v-pradeilles.bsky.social · 11/08/2026

Xcode 27 beta 5 is out and it comes with 3 new coding skills: ✓ app-intents-whats-new-27 ✓ app-intents-specialist ✓ building-document-based-swiftui-applications If you use Codex, Claude Code or Cursor make sure to run `xcrun agent skills export` again to get them

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Vincent Pradeilles @v-pradeilles.bsky.social · 11/08/2026

New in iOS 27: swipe actions are no longer limited to a List and can be used with any view container 👌

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Vincent Pradeilles @v-pradeilles.bsky.social · 05/08/2026

Don't build a Binding using closures 🙅🏽‍♀️🙅🏻‍♂️ This an official bad practice written by Apple in Xcode 27 coding skills

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Vincent Pradeilles @v-pradeilles.bsky.social · 24/07/2026

Don't use a Group when it contains only a single child View 🙅🏽‍♀️🙅🏻‍♂️ This an official bad practice written by Apple in Xcode 27 coding skills

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Vincent Pradeilles @v-pradeilles.bsky.social · 22/07/2026

Xcode: ❌ Build Failed iOS developer:

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Vincent Pradeilles @v-pradeilles.bsky.social · 21/07/2026

These coding skills are crazy because you realize you’ve been doing SwiftUI wrong for years

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Vincent Pradeilles @v-pradeilles.bsky.social · 21/07/2026

Don't store a closure in the Environment 🙅🏽‍♀️🙅🏻‍♂️ This an official bad practice written by Apple in Xcode 27 coding skills

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Vincent Pradeilles @v-pradeilles.bsky.social · 20/07/2026

Apple recommends splitting large SwiftUI views to improve performance. But why is it the case and how does the refactor look like? Here's a breakdown.

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Vincent Pradeilles @v-pradeilles.bsky.social · 16/07/2026

New in AppStore Connect: When a user is about to cancel their subscription, you can now offer them a discounted price.

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Vincent Pradeilles @v-pradeilles.bsky.social · 16/07/2026

Don't use `if/else` at the top level of a row 🙅🏽‍♀️🙅🏻‍♂️ This an official bad practice written by Apple in Xcode 27 coding skills

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Vincent Pradeilles @v-pradeilles.bsky.social · 15/07/2026

New in AppStore Connect: search results can display a custom visual instead of app screenshots. This visual can be customized depending on search keywords.

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Vincent Pradeilles @v-pradeilles.bsky.social · 14/07/2026

My personal tip when watching WWDC sessions: setting the playback speed to 1,5x It makes most sessions fit a 10-minute break 👌

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Vincent Pradeilles @v-pradeilles.bsky.social · 14/07/2026

Don't forget: Xcode 27 comes bundled with coding skills that you can export to Claude Code or Codex by running this command line

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Vincent Pradeilles @v-pradeilles.bsky.social · 13/07/2026

New in AppStore Connect: rich assets can be used with AppStore ads.

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Vincent Pradeilles @v-pradeilles.bsky.social · 13/07/2026

Don't initialize inline a default value when you store a class in the Environment 🙅🏽‍♀️🙅🏻‍♂️ This an official bad practice written by Apple in Xcode 27 coding skills

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Vincent Pradeilles @v-pradeilles.bsky.social · 10/07/2026

Don't use a type that's not Equatable inside an Observable class 🙅🏽‍♀️🙅🏻‍♂️ This an official bad practice written by Apple in Xcode 27 coding skills

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Vincent Pradeilles @v-pradeilles.bsky.social · 09/07/2026

New in Xcode 27: the new Device Hub app lets you dynamically test accessibility settings.

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