AI, EU, MCP and other acronyms

Dive into how static and dynamic dispatch work in Swift, how they affect performance, and how to control method resolution to write faster, more efficient code.

SwiftUI’s iPhone Duo toolbar story is getting more specific now: vertical bars, item axis behavior, compression priorities, and an escape hatch when the vertical layout makes a screen worse. The useful bit is not “new modifiers exist”, it is the judgment around when to let the system adapt and when to pin an item to horizontal space. `axisBehavior(_:)`, `toolbarVerticalEdge`, and `toolbarVerticalCompressionBehavior(_:)` give us just enough control without turning every toolbar into a custom layout project. I like this because it keeps our apps in the system’s lane, but still lets us say, “no, that slider really should not be crammed into the side bar.”

The Month iPhone Duo Gives Developers

We've released SwiftFairy, our new Mac app that helps coding agents review Swift and SwiftUI code. This month also took us to Wales for iOSDevUK, where Matt presented on interactive Swift Charts and I...

Explore alternatives to rectangular heatmap cells for visualising spatial data along coastlines and irregular boundaries.

SwiftFairy brings our Swift and SwiftUI expertise to your coding agent, running static analysis on your Mac over MCP and returning targeted guidance for each flagged issue.

SwiftFairy brings our Swift and SwiftUI expertise to your coding agent, running static analysis on your Mac over MCP and returning targeted guidance for each flagged issue.

Control how SwiftUI presents toolbar items and tabs on iPhone Duo with the new iOS 27.1 APIs, from arranging custom labels to prioritizing actions when space is limited.

A macOS app that locally reviews your agent's Swift and SwiftUI code and provides guidance to fix issues.

A macOS app that locally reviews your agent's Swift and SwiftUI code and provides guidance to fix issues.

Use the AttributedString API to build a reusable Text initializer that applies a distinct font to the unit component of a formatted measurement.

'The SwiftUI Way' has been updated with expanded guidance on SwiftUI data flow, view updates, and performance, including changes introduced in Xcode 27.

There’s a tiny launch argument here that deserves a spot in every SwiftUI performance debugging checklist: `-LogForEachSlowPath YES`. It catches `ForEach` content inside lazy containers when SwiftUI can’t know the number of views per element without evaluating offscreen rows, which is exactly the kind of invisible work that makes lists feel haunted. The fix is not always “wrap it in a `VStack`”; sometimes we should filter the collection before `ForEach`, and sometimes grouping is the right move because the element still exists. Small detail, big payoff. Our lists are only lazy if we stop making SwiftUI guess.

Build SwiftUI views that update periodically or continuously, without relying on explicit state changes, to create dynamic interfaces and visual effects.

Reorder items within and between custom SwiftUI containers, and build selection-aware multi-item drag and drop interactions with the new APIs in iOS 27.

Control how SwiftUI presents toolbar items and tabs on iPhone Duo with the new iOS 27.1 APIs, from arranging custom labels to prioritizing actions when space is limited.

Learn how to enable SwiftUI's ForEach slow-path diagnostic in Xcode, interpret warnings about variable view counts, and address the reported patterns in List and lazy stacks.

SwiftUI now includes CrossFadeNavigationTransition, a built-in cross-fade navigation transition, and AnyNavigationTransition, a type-erased wrapper that allows transitions to be selected dynamically a...

8 articles: Swift 6.4 Released, [Lambda] : Swift AWS Lambda Runtime 3.0.0 released, How to Export and Use Xcode 27's Agent Skills in Claude Code, and 5 more

iOS 27 gives AsyncImage more control over remote image loading with URLRequest support for custom headers, cache policies, and timeouts, plus the ability to provide a custom URLSession across a SwiftU...

Explore every SwiftUI blend mode through focused visuals and practical use cases, and learn how to control which views participate in each operation.

Learn how to enable SwiftUI's ForEach slow-path diagnostic in Xcode, interpret warnings about variable view counts, and address the reported patterns in List and lazy stacks.

SwiftUI toolbars are getting a vocabulary for the thing we’ve all been faking: what matters when space runs out. `visibilityPriority`, `ToolbarOverflowMenu`, pinned trailing items, and minimization behavior give us knobs instead of hoping the framework guesses our hierarchy of actions correctly. That matters more now with resizable windows, search taking over chrome, and devices that may change shape mid-session. Who doesn’t like deleting a weird custom “more” button and letting the system carry the overflow story properly?

Make your views and controls fit perfectly within their containers using new SwiftUI APIs in iOS 26 such as the ConcentricRectangle shape and the containerShape() view modifier.

A nice little Swift Charts recipe inspired by the iOS Weather UV chart: gradient area, matching line, current-time marker, and a dimming layer over the part of the day that has already passed. The technique is useful because it’s not just prettier data, it tells the user what’s behind them and what’s still ahead at a glance. Our apps often need exactly this kind of visual hint, the small layer that makes a chart feel alive instead of pasted in. Bonus points for keeping accessibility in the conversation when the area and line represent the same data.

Control which SwiftUI toolbar actions stay visible, move commands into overflow, pin an important item and configure navigation bar minimization with the new iOS 27 APIs.

Learn how alignment guides position views in SwiftUI, how to override a built-in guide, and how to define a custom alignment for views in nested containers.

Present grouped data as a multi-level donut chart, where each outer ring reveals a more detailed breakdown and each subgroup aligns with its parent category.

Build an interactive bar chart in Swift Charts that displays detailed annotations when the user is hovering over bar marks.

Present grouped data as a multi-level donut chart, where each outer ring reveals a more detailed breakdown and each subgroup aligns with its parent category.

8 articles: Swift for Wasm August 2026 Updates, Building AI features using Foundation Models. Multimodal input., Teaching Siri to talk about your favorite walks in Walk Mate, and 5 more

Learn how to use matchedGeometryEffect() in SwiftUI to animate a capsule background that highlights the selected option in a custom segmented control.

Present grouped data as a multi-level donut chart, where each outer ring reveals a more detailed breakdown and each subgroup aligns with its parent category.

Aberystwyth • 7th-10th September 2026

Create a chart with the Swift Charts framework to show UV index throughout the day inspired by the iOS Weather app that dims the area up to the current time.