Hi, I'm Sarun 👋 — an iOS developer.

iOS 27 lets you put a sheet on the leading or trailing side of the screen. See what each placement does on iPhone Duo when it is open, half-open, and closed.

In iOS 26, toolbar items next to each other merge into one Liquid Glass capsule. Learn which items merge, which ones stand alone, and how to split them with ToolbarSpacer.

iOS 27 adds concentricCornerRadii to GeometryProxy. It tells you the corner radii a view needs to match the corners of its container or the screen.

In iOS 26, an inline navigation title is centered only when it fits. Add a few toolbar items, and it jumps to the leading edge, or gets cut short next to a back button.

iOS 27 lets you put a sheet on the leading or trailing side of the screen. See what each placement does on iPhone Duo when it is open, half-open, and closed.

Choosing between the toolbar and tab bar, consolidating overflow, setting visibility priority, and when to turn vertical bars off.

How to opt a custom toolbar view into the vertical bar, change its layout, and read the vertical bar edge.

Why two pieces of data matter on iPhone Duo, how the system picks a representation, and how to override it with axis behavior.

Map, PhotosPicker, and WebView are not in SwiftUI. They live in cross-import overlays, modules that only show up when you import both halves. Here is what that means and how to spot one.

DecodingError and EncodingError now print a clean one-line summary with the coding path, instead of the wall of text we used to skim past.

Swift 6 lets a function declare exactly which error type it throws. Here is the syntax, what it does to catch blocks, and why untyped throws is still the right default.

Swift 6.1 allows a trailing comma in parameter lists, tuples, generic parameters, capture lists, and more. A small change that makes diffs a lot cleaner.

Export Apple's built-in agent skills from Xcode 27 and use them with your preferred coding agent.

Map, PhotosPicker, and WebView are not in SwiftUI. They live in cross-import overlays, modules that only show up when you import both halves. Here is what that means and how to spot one.

If your app takes forever to run on a device and you get this error in the console log. I will share what works for me in this article.

You probably get this error when you try to add a third-party framework to your project. Let's learn one way to fix it.