Natalia Panferova
@natpanferova.bsky.social
Software Engineer | iOS | macOS | Swift | SwiftUI | Previously SwiftUI at Apple | Author of books for Swift developers: https://books.nilcoalescing.com
Use the AttributedString API to build a reusable Text initializer in SwiftUI that applies a distinct font to the unit component of a formatted measurement: nilcoalescing.com/blog/Styling... #iOSDev #SwiftUI
Styling measurement unit fonts in SwiftUI
Use the AttributedString API to build a reusable Text initializer that applies a distinct font to the unit component of a formatted measurement.
nilcoalescing.com
Alignment guides are a powerful but often underused part of SwiftUI's layout system. They let us describe relationships between views using meaningful points in their content, without frame measurements or fixed offsets. I wrote a post explaining them in detail: nilcoalescing.com/blog/Alignme...
Alignment guides in SwiftUI
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.
nilcoalescing.com
SwiftUI's @State changes from a property wrapper to a macro in Xcode 27, gaining lazy evaluation of the initial value and fixing unnecessary @Observable model initialization on view recreation: nilcoalescing.com/blog/Initial... #iOSDev #SwiftUI
Initializing @Observable classes with the @State macro in Xcode 27
SwiftUI's @State changes from a property wrapper to a macro in Xcode 27, gaining lazy evaluation of the initial value and fixing unnecessary @Observable model initialization on view recreation.
nilcoalescing.com
🎨 𝑇ℎ𝑒 ℎ𝑖𝑑𝑑𝑒𝑛 𝑐𝑜𝑠𝑡 𝑜𝑓 𝑢𝑛𝑠𝑡𝑎𝑏𝑙𝑒 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 𝑒𝑛𝑣𝑖𝑟𝑜𝑛𝑚𝑒𝑛𝑡 𝑑𝑒𝑓𝑎𝑢𝑙𝑡𝑠 by Natalia Panferova (@natpanferova.bsky.social) A tiny SwiftUI default value can accidentally become a little invalidation machine, quietly re-rendering more than it should. #iOSDev #SwiftUI #Performance nilcoalescing.com/blog/Unstabl...
The hidden cost of unstable SwiftUI environment defaults
Learn why Xcode 27 shows a warning when an @Entry declaration creates a new class instance for every fallback access, how unstable environment defaults can cause unnecessary SwiftUI view updates, and…
nilcoalescing.com
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: nilcoalescing.com/blog/NewSwif... #iOSDev #SwiftUI
New SwiftUI APIs for reordering and drag and drop on iOS 27
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.
nilcoalescing.com
📢 𝗜𝘀𝘀𝘂𝗲 𝟭𝟬𝟯 𝗶𝘀 𝗼𝘂𝘁! Featuring: 🔶 𝐴𝑑𝑣𝑎𝑛𝑐𝑒𝑑 𝑆𝑤𝑖𝑓𝑡 📊 𝐵𝑢𝑖𝑙𝑑 𝐴𝑔𝑒𝑛𝑡𝑖𝑐 𝑆𝑤𝑖𝑓𝑡 𝐴𝑝𝑝𝑠 𝐷𝑦𝑛𝑎𝑚𝑖𝑐 𝑃𝑟𝑜𝑓𝑖𝑙𝑒𝑠 📱 𝐹𝑟𝑒𝑒 𝑢𝑝 𝑋𝑐𝑜𝑑𝑒 𝑑𝑖𝑠𝑘 𝑠𝑝𝑎𝑐𝑒 𝑠𝑎𝑓𝑒𝑙𝑦 𝐴𝐼 𝐴𝑔𝑒𝑛𝑡 🎨 𝐻𝑖𝑑𝑑𝑒𝑛 𝑐𝑜𝑠𝑡 𝑢𝑛𝑠𝑡𝑎𝑏𝑙𝑒 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 𝑒𝑛𝑣 𝑑𝑒𝑓𝑎𝑢𝑙𝑡𝑠 🚀 𝑆𝑒𝑚𝑎𝑛𝑡𝑖𝑐 𝐴𝑐𝑐𝑒𝑠𝑠𝑖𝑏𝑖𝑙𝑖𝑡𝑦 💡 𝐴𝑛𝑎𝑡𝑜𝑚𝑦 𝑅𝑒𝑢𝑠𝑎𝑏𝑙𝑒 𝑉𝑖𝑒𝑤 🛠️ 𝑆𝑤𝑖𝑓𝑡𝑆𝑡𝑎𝑠ℎ 🧠 𝑆𝑡𝑎𝑟𝑙𝑖𝑛𝑔 #Swift #iOSDev
iOS Newsletter Issue 103
Hi folks!
ios-newsletter.snappmobile.io
The July issue of the Nil Coalescing newsletter is out! It includes our trip to the /dev/world on tour conference, The SwiftUI Way book update, and a catalog of our recent Swift and SwiftUI blog posts. You can read it online: nilcoalescing.com/newsletter/2...
Nil Coalescing - Nil Coalescing Newsletter – July 2026
We've been putting this year's WWDC announcements into practice and preparing our apps for iOS 27 after a busy start to July at /dev/world on tour in Sydney. I've also released a substantial update to...
nilcoalescing.com
SwiftLee Weekly Issue 334 was sent to 31,214 subscribers with content from @natpanferova.bsky.social, @rocketsim.app, Anton Gubarenko, Jacob Rakidzich swiftlee-weekly.com/issues/334/
🎨 𝐺𝑒𝑜𝑚𝑒𝑡𝑟𝑦, 𝐶𝑜𝑚𝑝𝑜𝑠𝑖𝑡𝑖𝑛𝑔 𝑎𝑛𝑑 𝐷𝑟𝑎𝑤𝑖𝑛𝑔 𝐺𝑟𝑜𝑢𝑝𝑠 𝑖𝑛 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 by Natalia Panferova (@natpanferova.bsky.social) Ever wondered why your SwiftUI animation looks like it's falling apart? It's usually a geometry or compositing boundary issue. #iOSDev #SwiftUI nilcoalescing.com/blog/Geometr...
Geometry, compositing and drawing groups in SwiftUI
Learn how SwiftUI's similarly named geometryGroup(), compositingGroup() and drawingGroup() modifiers affect distinct stages of animation and rendering, and when each is appropriate.
nilcoalescing.com
To keep pan, zoom and rotation responsive in @exstoapp.bsky.social, we reproject the latest GPU result while Metal renders an updated canvas. I wrote about the process: nilcoalescing.com/blog/Keeping... #iOSDev #Metal
Keeping canvas interactions responsive with frame reprojection
Keep a complex Metal-rendered canvas responsive during pan, zoom and rotation gestures by reprojecting rendered states with CAMetalLayer.
nilcoalescing.com
Explore every SwiftUI blend mode through focused visuals and practical use cases, and learn how to control which views participate in each operation: nilcoalescing.com/blog/BlendMo... #iOSDev #SwiftUI
Blend modes in SwiftUI
Explore every SwiftUI blend mode through focused visuals and practical use cases, and learn how to control which views participate in each operation.
nilcoalescing.com
📢 𝗜𝘀𝘀𝘂𝗲 𝟭𝟬𝟮 𝗶𝘀 𝗼𝘂𝘁! Featuring: 🔶 𝑇𝑦𝑝𝑒𝑎𝑙𝑖𝑎𝑠 𝑈𝑠𝑎𝑔𝑒 𝑆𝑤𝑖𝑓𝑡 📊 𝐴𝑝𝑝𝑙𝑒'𝑠 30% 𝐿𝑎𝑢𝑛𝑐ℎ 𝐵𝑜𝑜𝑠𝑡 🧩 𝑀𝑎𝑠𝑡𝑒𝑟𝑖𝑛𝑔 𝑀𝑜𝑑𝑒𝑙 𝐿𝑎𝑦𝑒𝑟 🎨 𝐺𝑒𝑜𝑚𝑒𝑡𝑟𝑦, 𝐶𝑜𝑚𝑝𝑜𝑠𝑖𝑡𝑖𝑛𝑔 𝐷𝑟𝑎𝑤𝑖𝑛𝑔 📱 𝐵𝑢𝑖𝑙𝑑𝑖𝑛𝑔 𝐴𝑑𝑎𝑝𝑡𝑖𝑣𝑒 𝑁𝑜𝑛-𝑀𝑜𝑑𝑎𝑙 🚀 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 𝑂𝑛𝑒 𝐺𝑟𝑎𝑝ℎ, 💡 𝑆𝑦𝑛𝑐𝑖𝑛𝑔 𝑆𝑤𝑖𝑓𝑡𝐷𝑎𝑡𝑎 𝐶𝑢𝑠𝑡𝑜𝑚 🛠️ 𝑇𝑟𝑎𝑛𝑠𝑐𝑟𝑖𝑏𝑒.𝑐𝑝𝑝 #Swift #iOSDev ios-newsletter.snappmobile.io/issues/2026-...
iOS Newsletter Issue 102
Hi again!
ios-newsletter.snappmobile.io
Configure a SwiftUI app to schedule and handle a background fetch task using the Background Tasks framework and the backgroundTask(_:action:) SwiftUI modifier: nilcoalescing.com/blog/Schedul... #iOSDev #SwiftUI
Scheduling and handling background app refresh in SwiftUI
Configure a SwiftUI app to schedule and handle a background fetch task using the Background Tasks framework and the backgroundTask(_:action:) SwiftUI modifier.
nilcoalescing.com
I’ve been wanting to explore and document SwiftUI’s blend modes for a while. I finally worked through all 21 of them, with visuals and practical examples showing how each one works and when it can be useful: nilcoalescing.com/blog/BlendMo... #iOSDev #SwiftUI
Blend modes in SwiftUI
Explore every SwiftUI blend mode through focused visuals and practical use cases, and learn how to control which views participate in each operation.
nilcoalescing.com
Learn how to build a non-modal, detent-based sheet API in SwiftUI that adapts from a bottom panel in portrait to an edge-aligned panel in landscape: nilcoalescing.com/blog/Buildin... #iOSDev #SwiftUI
Building adaptive non-modal panels in SwiftUI
Learn how to build a non-modal, detent-based sheet API in SwiftUI that adapts from a bottom panel in portrait to an edge-aligned panel in landscape.
nilcoalescing.com
Learn how SwiftUI's similarly named geometryGroup(), compositingGroup() and drawingGroup() modifiers affect distinct stages of animation and rendering, and when each is appropriate: nilcoalescing.com/blog/Geometr... #iOSDev #SwiftUI
Geometry, compositing and drawing groups in SwiftUI
Learn how SwiftUI's similarly named geometryGroup(), compositingGroup() and drawingGroup() modifiers affect distinct stages of animation and rendering, and when each is appropriate.
nilcoalescing.com
Fatbobman’s Swift Weekly #145 is now available! When Inspiration Outruns the Results 🔭 Geometry, Compositing and Drawing Groups 🧷 Swift 6 LLM Benchmark ⚡ Public Asset Symbol 🔍 Previews and MCP 📈 What's an Icon in 2026? more... weekly.fatbobman.com/p/fatbobman...
Fatbobman's Swift Weekly #145
When Inspiration Outruns the Results
weekly.fatbobman.com
To prepare Strolly for app resizability in iOS 27, we wanted its non-modal detent sheets to adapt into side panels on wider displays. SwiftUI sheets don’t support that presentation, so we built our own panel API: nilcoalescing.com/blog/Buildin... #SwiftUI #iOSDev
Building adaptive non-modal panels in SwiftUI
Learn how to build a non-modal, detent-based sheet API in SwiftUI that adapts from a bottom panel in portrait to an edge-aligned panel in landscape.
nilcoalescing.com
📢 𝗜𝘀𝘀𝘂𝗲 𝟭𝟬𝟭 𝗶𝘀 𝗼𝘂𝘁! Featuring: 🔒 𝑇𝑎𝑠𝑘 𝑎𝑙𝑖𝑣𝑒 𝑑𝑢𝑟𝑎𝑡𝑖𝑜𝑛 🔍 𝑈𝑠𝑒𝑟 𝐷𝑖𝑎𝑔𝑛𝑜𝑠𝑡𝑖𝑐𝑠 𝑅𝑒𝑝𝑜𝑟𝑡𝑠 📱 𝑆ℎ𝑖𝑝𝑝𝑖𝑛𝑔 𝑤𝑖𝑡ℎ𝑜𝑢𝑡 𝑋𝑐𝑜𝑑𝑒 🛠️ 𝑆𝑝𝑒𝑐 𝐾𝑖𝑡 🎨 𝑊𝑊𝐷𝐶 26 𝑈𝑝𝑑𝑎𝑡𝑒 🚀 𝑃𝑜𝑤𝑒𝑟 𝑜𝑓 𝑃𝑟𝑒𝑣𝑖𝑒𝑤𝑠 💡 𝑅𝑜𝑡𝑎𝑡𝑖𝑛𝑔 𝐿𝑖𝑞𝑢𝑖𝑑 𝐺𝑙𝑎𝑠𝑠 ⚡ 𝐸𝑞𝑢𝑎𝑡𝑎𝑏𝑙𝑒 𝑝𝑟𝑜𝑝𝑒𝑟𝑡𝑖𝑒𝑠 @𝑂𝑏𝑠𝑒𝑟𝑣𝑎𝑏𝑙𝑒 #Swift #iOSDev ios-newsletter.snappmobile.io/issues/2026-...
iOS Newsletter Issue 101
Hi folks,
ios-newsletter.snappmobile.io
Strolly (@strollyapp.bsky.social) got an update! You can now indicate the areas you prefer to walk in and the areas you'd like to avoid, and future generated walks will take your preferences into account. Thank you @hishnash.bsky.social for working on it! apps.apple.com/us/app/strol... #IndieDev
"The SwiftUI Way" book by @natpanferova.bsky.social has been updated with expanded guidance on SwiftUI data flow, view updates, and performance, including changes introduced in Xcode 27: nilcoalescing.com/blog/TheSwif... #iOSDev #SwiftUI
"The SwiftUI Way" book update: expanded guidance on data flow and performance
'The SwiftUI Way' has been updated with expanded guidance on SwiftUI data flow, view updates, and performance, including changes introduced in Xcode 27.
nilcoalescing.com
Strolly 1.6 is here! Show Strolly the areas you enjoy and the places you would rather avoid, helping it find better walks for you. New Home and Lock Screen widgets keep today’s route close at hand. Get it on the App Store: apps.apple.com/app/apple-st... #Walking #IndieDev
SwiftUI has three similarly named grouping modifiers: geometryGroup(), compositingGroup() and drawingGroup(). If, like me, you sometimes forget which one does what, I’ve just published a guide explaining how they differ and when to use each one: nilcoalescing.com/blog/Geometr... #iOSDev #SwiftUI
Geometry, compositing and drawing groups in SwiftUI
Learn how SwiftUI's similarly named geometryGroup(), compositingGroup() and drawingGroup() modifiers affect distinct stages of animation and rendering, and when each is appropriate.
nilcoalescing.com
One of my favorite features in Tintly is the ability to easily reorganize colors for quick experimentation when designing a gradient. In v1.1, it's also possible to select multiple points on the canvas and swap or shuffle their colors for a more controlled change: apps.apple.com/us/app/tintl...
Prevent unnecessary SwiftUI view updates by making custom types stored in @Observable properties conform to Equatable: nilcoalescing.com/blog/Equatab... #iOSDev #SwiftUI
Equatable properties in @Observable classes
Prevent unnecessary SwiftUI view updates by making custom types stored in @Observable properties conform to Equatable.
nilcoalescing.com
I've released an update to my book "The SwiftUI Way"! It expands the coverage of SwiftUI data flow, view updates, and performance, and includes new guidance for changes introduced in Xcode 27: books.nilcoalescing.com/the-swiftui-... #iOSDev #SwiftUI
The SwiftUI Way
A field guide to SwiftUI patterns and anti-patterns
books.nilcoalescing.com
One of my favorite features in Tintly is the ability to easily reorganize colors for quick experimentation when designing a gradient. In v1.1, it's also possible to select multiple points on the canvas and swap or shuffle their colors for a more controlled change: apps.apple.com/us/app/tintl...
I've released an update to my book "The SwiftUI Way"! It expands the coverage of SwiftUI data flow, view updates, and performance, and includes new guidance for changes introduced in Xcode 27: books.nilcoalescing.com/the-swiftui-... #iOSDev #SwiftUI
The SwiftUI Way
A field guide to SwiftUI patterns and anti-patterns
books.nilcoalescing.com
Learn why Xcode 27 shows a warning when an @Entry declaration creates a new class instance for every fallback access, how unstable environment defaults can cause unnecessary SwiftUI view updates, and how to make them stable: nilcoalescing.com/blog/Unstabl... #iOSDev #SwiftUI
The hidden cost of unstable SwiftUI environment defaults
Learn why Xcode 27 shows a warning when an @Entry declaration creates a new class instance for every fallback access, how unstable environment defaults can cause unnecessary SwiftUI view updates, and ...
nilcoalescing.com
🎨 𝐶𝑢𝑠𝑡𝑜𝑚 𝑏𝑖𝑛𝑑𝑖𝑛𝑔𝑠 𝑖𝑛 𝑆𝑤𝑖𝑓𝑡𝑈𝐼: 𝑐𝑙𝑜𝑠𝑢𝑟𝑒𝑠 𝑣𝑠 𝑠𝑢𝑏𝑠𝑐𝑟𝑖𝑝𝑡𝑠 by Natalia Panferova (@natpanferova.bsky.social) We've all used 𝐵𝑖𝑛𝑑𝑖𝑛𝑔(𝑔𝑒𝑡:𝑠𝑒𝑡:) and wondered why our views are re-rendering for no reason. Turns out, creating these closures in the body is a performance trap. #iOSDev #SwiftUI #Performance
Custom bindings in SwiftUI: closures vs subscripts
Learn how closure-based bindings can affect SwiftUI view updates, and how labeled subscripts give the framework a more stable way to track changes.
nilcoalescing.com