New in SwiftUI
In iOS 26, we can finally make buttons expand to fill the available width of their container using buttonSizing().
In iOS 26, we can finally make buttons expand to fill the available width of their container using buttonSizing().
Logging Privacy Shenanigans
This article explains why macOS unified logging redacts runtime values as <private> and why sudo can’t recover them (redaction happens at write time).
It shows a practical fix - drop a plist with Enable-Private-Data=true into /Library/Preferences/Logging/Subsystems/ (or use a configuration profile) and, for production, explicitly mark safe fields with privacy: .public.
This article explains why macOS unified logging redacts runtime values as <private> and why sudo can’t recover them (redaction happens at write time).
It shows a practical fix - drop a plist with Enable-Private-Data=true into /Library/Preferences/Logging/Subsystems/ (or use a configuration profile) and, for production, explicitly mark safe fields with privacy: .public.
Check out these iOS (on-site or hybrid) openings:
1. TymeX (Ho Chi Minh, Vietnam, hybrid)
TymeX is part of Tyme Group, a multi-country digital banking group focused on emerging markets, providing innovative and low-cost financial services to empower customers.
iOS Developer (Swift) 3+
2. inventYOU (Athens, Thessaloniki - Greece, hybrid)
inventYOU is a Sweden-based IT consulting firm founded in 2017, offering senior IT services and nearshoring solutions from Greece with expertise across various technology stacks.
Junior iOS Developer (Swift) 1+
3. Fam (Bengalur, on-site)
Fam, founded in 2019 by IIT Roorkee alumni, is India’s first payments app for users above 11, offering UPI, FamCard, and FamX Spending Accounts to promote early financial inclusion, backed by investors like Y Combinator, Sequoia India, and Elevation Capital. https://www.famapp.in
Mobile Architect
4. GetYourGuide (Zurich, Berlin, hybrid)
GetYourGuide is a global online marketplace founded in 2009, offering tours, attractions, and unique travel experiences in over 12,000 cities, with 150 million tickets sold through 30,000 partners.
- Zurich - Senior iOS Engineer
- Zurich - Senior Engineer (iOS), Payments
- Berlin - Senior iOS Engineer
5. Ryanair (Madrid, Spain)
Ryanair Holdings plc is Europe’s largest airline group, comprising Ryanair DAC, Lauda, Buzz, and Ryanair UK, carrying over 160 million passengers annually on 3,000+ daily flights across 225 airports, with plans to reach 225 million passengers by 2026.
iOS Developer
6. emmersion - Performance & Brand Experience Agency (Melbourne, Australia, on-site)
emmersion is a Melbourne-born performance and brand experience agency with offices in Sydney, LA, and Shanghai, specializing in creative, measurable advertising and growth partnerships for global brands.
Senior Mobile Engineer (iOS / Android) 7+
7. Yettel (Sofia, Bulgaria)
Yettel, part of e&PPF Telecom Group, is a leading Bulgarian telecom operator with 1,800+ employees and 180+ stores, known for pioneering 4G, VoLTE, and 5G in the country and covering over 99% of the population.
iOS Software Developer
8. Nugget. ai (Mississauga, ON, hybrid)
Nugget.ai, founded in 2018 in Toronto, Canada, is an AI company providing a talent management platform that supports hiring, training, and workforce development through advanced AI and scientific methods. https://www.nugget.ai
Native iOS Developer
9. baz (Tlalpan, Mexico, on-site)
baz is Mexico’s first super app, designed to drive financial inclusion, support entrepreneurs, and transform digital business and lifestyle experiences.
Desarrollador de iOS
10. WaveLynx (Broomfield, CO)
- $115,000 - $125,000
WaveLynx, founded in 2013, is a security technology company that simplifies authentication with flexible, scalable solutions for credentials, key management, and mobile wallet access across global platforms.
iOS Engineer
_______________________
Daily REMOTE iOS job updates + iOS interview prep materials on the private Patreon page
“iOS (Swift) Jobs” → https://patreon.com/iOSjobs
Join for just €2(+VAT)/ month - about the price of a coffee ☕️
1. TymeX (Ho Chi Minh, Vietnam, hybrid)
TymeX is part of Tyme Group, a multi-country digital banking group focused on emerging markets, providing innovative and low-cost financial services to empower customers.
iOS Developer (Swift) 3+
2. inventYOU (Athens, Thessaloniki - Greece, hybrid)
inventYOU is a Sweden-based IT consulting firm founded in 2017, offering senior IT services and nearshoring solutions from Greece with expertise across various technology stacks.
Junior iOS Developer (Swift) 1+
3. Fam (Bengalur, on-site)
Fam, founded in 2019 by IIT Roorkee alumni, is India’s first payments app for users above 11, offering UPI, FamCard, and FamX Spending Accounts to promote early financial inclusion, backed by investors like Y Combinator, Sequoia India, and Elevation Capital. https://www.famapp.in
Mobile Architect
4. GetYourGuide (Zurich, Berlin, hybrid)
GetYourGuide is a global online marketplace founded in 2009, offering tours, attractions, and unique travel experiences in over 12,000 cities, with 150 million tickets sold through 30,000 partners.
- Zurich - Senior iOS Engineer
- Zurich - Senior Engineer (iOS), Payments
- Berlin - Senior iOS Engineer
5. Ryanair (Madrid, Spain)
Ryanair Holdings plc is Europe’s largest airline group, comprising Ryanair DAC, Lauda, Buzz, and Ryanair UK, carrying over 160 million passengers annually on 3,000+ daily flights across 225 airports, with plans to reach 225 million passengers by 2026.
iOS Developer
6. emmersion - Performance & Brand Experience Agency (Melbourne, Australia, on-site)
emmersion is a Melbourne-born performance and brand experience agency with offices in Sydney, LA, and Shanghai, specializing in creative, measurable advertising and growth partnerships for global brands.
Senior Mobile Engineer (iOS / Android) 7+
7. Yettel (Sofia, Bulgaria)
Yettel, part of e&PPF Telecom Group, is a leading Bulgarian telecom operator with 1,800+ employees and 180+ stores, known for pioneering 4G, VoLTE, and 5G in the country and covering over 99% of the population.
iOS Software Developer
8. Nugget. ai (Mississauga, ON, hybrid)
Nugget.ai, founded in 2018 in Toronto, Canada, is an AI company providing a talent management platform that supports hiring, training, and workforce development through advanced AI and scientific methods. https://www.nugget.ai
Native iOS Developer
9. baz (Tlalpan, Mexico, on-site)
baz is Mexico’s first super app, designed to drive financial inclusion, support entrepreneurs, and transform digital business and lifestyle experiences.
Desarrollador de iOS
10. WaveLynx (Broomfield, CO)
- $115,000 - $125,000
WaveLynx, founded in 2013, is a security technology company that simplifies authentication with flexible, scalable solutions for credentials, key management, and mobile wallet access across global platforms.
iOS Engineer
_______________________
Daily REMOTE iOS job updates + iOS interview prep materials on the private Patreon page
“iOS (Swift) Jobs” → https://patreon.com/iOSjobs
Join for just €2(+VAT)/ month - about the price of a coffee ☕️
SwiftUI Tip
In iOS 26, use scrollEdgeEffectStyle() to control the blur level at the edges of a scroll view.
In iOS 26, use scrollEdgeEffectStyle() to control the blur level at the edges of a scroll view.
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How to write a good design document
This short article explains what a design document is and how to make it persuasive: organize ideas so every sentence flows, model the reader’s mind, and preempt objections like a mathematical proof.
It stresses ruthless editing, lots of practice (AWS-style culture), and tips such as one idea per short paragraph, appendices for details, and a worked edit example.
The summary:
- Define the system, constraints, and trade-offs; aim to prove the design is optimal for the situation.
- Organize like clean code: one idea per paragraph, smooth logical flow, no “spaghetti prose.”
- Write for the reader’s starting mindset; anticipate and preempt objections.
- Edit hard: remove every unnecessary word—first drafts can usually shrink ~30%.
- Offload details to an appendix (e.g., simulations, long calcs).
- Practice a lot; feedback culture (Amazon-style 1–6 page docs) accelerates skill.
This short article explains what a design document is and how to make it persuasive: organize ideas so every sentence flows, model the reader’s mind, and preempt objections like a mathematical proof.
It stresses ruthless editing, lots of practice (AWS-style culture), and tips such as one idea per short paragraph, appendices for details, and a worked edit example.
The summary:
- Define the system, constraints, and trade-offs; aim to prove the design is optimal for the situation.
- Organize like clean code: one idea per paragraph, smooth logical flow, no “spaghetti prose.”
- Write for the reader’s starting mindset; anticipate and preempt objections.
- Edit hard: remove every unnecessary word—first drafts can usually shrink ~30%.
- Offload details to an appendix (e.g., simulations, long calcs).
- Practice a lot; feedback culture (Amazon-style 1–6 page docs) accelerates skill.
☃1
SwiftUI Tip
In iOS 26, the glassEffect() modifier lets you choose between .identity, .regular, and .clear to control how much background shows through.
In iOS 26, the glassEffect() modifier lets you choose between .identity, .regular, and .clear to control how much background shows through.
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Check out these iOS hybrid openings:
Starling Bank (UK, hybrid)
- London, Manchester, Cardiff, Southampton
Starling Bank is the UK’s first fully licensed digital bank, employing over 3,000 people across London, Southampton, Cardiff, and Manchester, combining fintech innovation with a mission to make banking fairer, simpler, and more transparent.
iOS Engineer
Senior iOS Engineer
_______________________
Daily REMOTE iOS job updates + iOS interview prep materials on the private Patreon page
“iOS (Swift) Jobs” → https://patreon.com/iOSjobs
Join for just €2(+VAT)/ month - about the price of a coffee ☕️
Starling Bank (UK, hybrid)
- London, Manchester, Cardiff, Southampton
Starling Bank is the UK’s first fully licensed digital bank, employing over 3,000 people across London, Southampton, Cardiff, and Manchester, combining fintech innovation with a mission to make banking fairer, simpler, and more transparent.
iOS Engineer
Senior iOS Engineer
_______________________
Daily REMOTE iOS job updates + iOS interview prep materials on the private Patreon page
“iOS (Swift) Jobs” → https://patreon.com/iOSjobs
Join for just €2(+VAT)/ month - about the price of a coffee ☕️
A cheat-sheet repo on Architecture Decision Records (ADRs): how to capture what you decided, why, in what context, and with what consequences.
It explains why ADRs matter, how to name and store them (often in git), and how to write them well, plus popular templates, real-world examples, and team practices for lifecycle and governance.
Goal: make the rationale for your architecture explicit, shareable, and durable.
It explains why ADRs matter, how to name and store them (often in git), and how to write them well, plus popular templates, real-world examples, and team practices for lifecycle and governance.
Goal: make the rationale for your architecture explicit, shareable, and durable.
iBeacon: Bluetooth Low Energy Beacons for iOS Apps
What iBeacon is: Bluetooth Low Energy beacons that tell an iOS device “I’m nearby.” Used for indoor navigation and proximity triggers (museum, stadium, retail).
For apps. Via Core Location you can:
- determine proximity (immediate / near / far)
- range beacons (Ranging for Beacons sample)
- show a Pass on the Lock Screen when approaching
- turn an iPhone/iPad into a beacon
Developer resources:
- “Getting Started” guides, session videos, discussion forum
Hardware & branding. Requirements for iBeacon-compatible hardware and licensing.
After acceptance you get:
- Works with Apple iBeacon badges and usage guidelines
- the Proximity Beacon Specification (technical spec)
- artwork files for device labeling
Bottom line: a beacon is a silent marker; the phone detects proximity and triggers the right scenario in the app.
What iBeacon is: Bluetooth Low Energy beacons that tell an iOS device “I’m nearby.” Used for indoor navigation and proximity triggers (museum, stadium, retail).
For apps. Via Core Location you can:
- determine proximity (immediate / near / far)
- range beacons (Ranging for Beacons sample)
- show a Pass on the Lock Screen when approaching
- turn an iPhone/iPad into a beacon
Developer resources:
- “Getting Started” guides, session videos, discussion forum
Hardware & branding. Requirements for iBeacon-compatible hardware and licensing.
After acceptance you get:
- Works with Apple iBeacon badges and usage guidelines
- the Proximity Beacon Specification (technical spec)
- artwork files for device labeling
Bottom line: a beacon is a silent marker; the phone detects proximity and triggers the right scenario in the app.
Managing the on-device foundation model’s context window
Learn how to budget for the context window limit of Apple’s on-device foundation model and handle the error when reaching the limit.
This new technote explains how to budget and manage the 4096-token context window for Apple’s on-device foundation model, profile token use with Instruments, and handle the exceededContextWindowSize error.
It recommends splitting work across sessions, writing shorter prompts, optimizing Generable types and tool calls, using RAG, and rebuilding context from transcripts when limits are hit.
Learn how to budget for the context window limit of Apple’s on-device foundation model and handle the error when reaching the limit.
This new technote explains how to budget and manage the 4096-token context window for Apple’s on-device foundation model, profile token use with Instruments, and handle the exceededContextWindowSize error.
It recommends splitting work across sessions, writing shorter prompts, optimizing Generable types and tool calls, using RAG, and rebuilding context from transcripts when limits are hit.
AppMigrationKit is a new Apple framework for a one-time migration of your app’s on-device data between iOS/iPadOS and a device on another platform (e.g., Android).
- You create an app extension that implements AppMigrationExtension and its subprotocols - this determines whether your app can export, import, or do both.
- It transfers on-device local data. Any cloud data (iCloud, your own backend, etc.) should be fetched after the migration completes, on both platforms.
- Works only for cross-platform migration (Apple ↔︎ non-Apple). It isn’t used for transfers between iOS/iPadOS devices.
- No functionality in iOS apps running in visionOS, in macOS on Apple silicon, and calls from Mac Catalyst apps
- Version requirements: iOS 26.1+ / iPadOS 26.1+ (currently in Beta).
- You create an app extension that implements AppMigrationExtension and its subprotocols - this determines whether your app can export, import, or do both.
- It transfers on-device local data. Any cloud data (iCloud, your own backend, etc.) should be fetched after the migration completes, on both platforms.
- Works only for cross-platform migration (Apple ↔︎ non-Apple). It isn’t used for transfers between iOS/iPadOS devices.
- No functionality in iOS apps running in visionOS, in macOS on Apple silicon, and calls from Mac Catalyst apps
- Version requirements: iOS 26.1+ / iPadOS 26.1+ (currently in Beta).
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Check out these iOS openings:
1. Spline (Wrocław, Poland)
Spline is a Polish consultancy founded to provide global design, IT technology, and engineering services, delivering innovative and high-quality solutions that drive business growth.
Senior Developer iOS Mobile Apps 4+
2. LinkedIn (Mountain View, CA)
- iOS Software Engineer
$102,000 to $167,000
- Sr. iOS Software Engineer
$125,000 to $206,000
3. Grammarly (Seattle, hybrid)
Software Engineer, macOS/iOS, 4+
4. Duolingo
- NY - Senior iOS Engineer, App Builds, 6+
- NY - Senior iOS Software Engineer, Short Form Experience Team
- Pittsburgh - Senior iOS Software Engineer, Short Form Experience Team
- Beijing, China - Software Engineer, iOS, 1+, Growth Pillar
_______________________
Daily REMOTE iOS job updates + iOS interview prep materials on the private Patreon page
“iOS (Swift) Jobs” → https://patreon.com/iOSjobs
Join for just €2(+VAT)/ month - about the price of a coffee ☕️
1. Spline (Wrocław, Poland)
Spline is a Polish consultancy founded to provide global design, IT technology, and engineering services, delivering innovative and high-quality solutions that drive business growth.
Senior Developer iOS Mobile Apps 4+
2. LinkedIn (Mountain View, CA)
- iOS Software Engineer
$102,000 to $167,000
- Sr. iOS Software Engineer
$125,000 to $206,000
3. Grammarly (Seattle, hybrid)
Software Engineer, macOS/iOS, 4+
4. Duolingo
- NY - Senior iOS Engineer, App Builds, 6+
- NY - Senior iOS Software Engineer, Short Form Experience Team
- Pittsburgh - Senior iOS Software Engineer, Short Form Experience Team
- Beijing, China - Software Engineer, iOS, 1+, Growth Pillar
_______________________
Daily REMOTE iOS job updates + iOS interview prep materials on the private Patreon page
“iOS (Swift) Jobs” → https://patreon.com/iOSjobs
Join for just €2(+VAT)/ month - about the price of a coffee ☕️
Apple Hello Developer, October 2025
1. Code along with the Foundation Models framework
An Apple Developer code-along session where Shashank from Apple shows how to build generative AI features in Xcode using the new Foundation Models framework. It teaches developers to access Apple’s on-device LLM for text generation, structured data output, streaming responses, and tool calling - all running privately and offline on macOS/iOS 26.
2. Secure your app with Memory Integrity Enforcement
This video introduces Memory Integrity Enforcement (MIE), where hardware memory tagging, the OS, and the compiler block exploits like buffer overflows and use-after-free by aborting invalid memory access. It shows how to enable Enhanced Security in Xcode, use diagnostics and Soft Mode to find and fix bugs, and highlights caveats like tag bits in pointers and pointer hashing.
3. Create games for Apple devices
Apple’s “Games” developer page showcases tools and resources for building and porting games across iOS, macOS, tvOS, visionOS, and more. It highlights Game Porting Toolkit, Metal, Game Center, the Apple Games app, learning pathways, developer stories, and links to events and downloads.
4. Improved submission experience in App Store Connect
Now you can send additional items to App Review independent of an existing submission, giving you greater flexibility when submitting your apps and games. For example, if you have a custom product page under review, you can now submit an app version separately to address a critical bug.
5. How Paku on Apple Watch helps people breathe easy
A developer story about Kyle Bashour and his indie app Paku, which delivers hyperlocal air-quality data on iPhone, iPad, Mac, and Apple Watch. He built it mainly with SwiftUI plus WidgetKit, MapKit, Swift Charts, App Intents, and uses Swift Actors and server-side Swift for safe caching and real-time updates. It also covers his watchOS 10 redesign and solo-dev workflow.
6. New documentations
- Enhancing your app with machine learning-based video effects
Add powerful effects to your videos using the VideoToolbox VTFrameProcessor API
- Adopting smart framing in your camera app
Capture the optimal shot by providing automatic framing recommendations
- Explore HIG updates to Materials, Motion, and Layout
- TN3191: IMAP extensions supported by Mail for iOS, iPadOS, and visionOS
Learn which extensions to the RFC 3501 IMAP protocol are supported by Mail for iOS, iPadOS, and visionOS
- TN3134: Network Extension provider deployment
Explore the platforms, packaging, OS versions, and device configurations for Network Extension provider deployment
- TN3111: iOS Wi-Fi API overview
Explore the various Wi-Fi APIs available on iOS and their expected use cases
- TN3106: Customizing the appearance of UINavigationBar
Adopt UINavigationBarAppearance for a navigation bar background color that’s consistent on iOS 13 through 18
- TN3151: Choosing the right networking API
Learn which networking API is best for you
1. Code along with the Foundation Models framework
An Apple Developer code-along session where Shashank from Apple shows how to build generative AI features in Xcode using the new Foundation Models framework. It teaches developers to access Apple’s on-device LLM for text generation, structured data output, streaming responses, and tool calling - all running privately and offline on macOS/iOS 26.
2. Secure your app with Memory Integrity Enforcement
This video introduces Memory Integrity Enforcement (MIE), where hardware memory tagging, the OS, and the compiler block exploits like buffer overflows and use-after-free by aborting invalid memory access. It shows how to enable Enhanced Security in Xcode, use diagnostics and Soft Mode to find and fix bugs, and highlights caveats like tag bits in pointers and pointer hashing.
3. Create games for Apple devices
Apple’s “Games” developer page showcases tools and resources for building and porting games across iOS, macOS, tvOS, visionOS, and more. It highlights Game Porting Toolkit, Metal, Game Center, the Apple Games app, learning pathways, developer stories, and links to events and downloads.
4. Improved submission experience in App Store Connect
Now you can send additional items to App Review independent of an existing submission, giving you greater flexibility when submitting your apps and games. For example, if you have a custom product page under review, you can now submit an app version separately to address a critical bug.
5. How Paku on Apple Watch helps people breathe easy
A developer story about Kyle Bashour and his indie app Paku, which delivers hyperlocal air-quality data on iPhone, iPad, Mac, and Apple Watch. He built it mainly with SwiftUI plus WidgetKit, MapKit, Swift Charts, App Intents, and uses Swift Actors and server-side Swift for safe caching and real-time updates. It also covers his watchOS 10 redesign and solo-dev workflow.
6. New documentations
- Enhancing your app with machine learning-based video effects
Add powerful effects to your videos using the VideoToolbox VTFrameProcessor API
- Adopting smart framing in your camera app
Capture the optimal shot by providing automatic framing recommendations
- Explore HIG updates to Materials, Motion, and Layout
- TN3191: IMAP extensions supported by Mail for iOS, iPadOS, and visionOS
Learn which extensions to the RFC 3501 IMAP protocol are supported by Mail for iOS, iPadOS, and visionOS
- TN3134: Network Extension provider deployment
Explore the platforms, packaging, OS versions, and device configurations for Network Extension provider deployment
- TN3111: iOS Wi-Fi API overview
Explore the various Wi-Fi APIs available on iOS and their expected use cases
- TN3106: Customizing the appearance of UINavigationBar
Adopt UINavigationBarAppearance for a navigation bar background color that’s consistent on iOS 13 through 18
- TN3151: Choosing the right networking API
Learn which networking API is best for you
🤪3
SwiftUI Tip
In iOS 26, toolbar items get a glass background by default.
You can remove it with .sharedBackgroundVisibility(.hidden).
In iOS 26, toolbar items get a glass background by default.
You can remove it with .sharedBackgroundVisibility(.hidden).
Updated Apple Developer Program License Agreement now available
Apple revised the Developer Program License Agreement to align with new policies and clarify several sections.
It updates terms on interpreted code, Location Push Service Extension, Xcode Cloud and CloudKit (EU Data Act), Tap to Pay APIs, Promo Codes, and Offer Codes.
Apple revised the Developer Program License Agreement to align with new policies and clarify several sections.
It updates terms on interpreted code, Location Push Service Extension, Xcode Cloud and CloudKit (EU Data Act), Tap to Pay APIs, Promo Codes, and Offer Codes.
New requirements for apps available in Texas
Apple announced changes due to Texas law SB2420, effective January 1, 2026, requiring age verification for all app downloads.
Users under 18 must join Family Sharing, with parental consent needed for all downloads and purchases. Apple will release new APIs, including the Declared Age Range API, to help developers comply while protecting user privacy.
Apple announced changes due to Texas law SB2420, effective January 1, 2026, requiring age verification for all app downloads.
Users under 18 must join Family Sharing, with parental consent needed for all downloads and purchases. Apple will release new APIs, including the Declared Age Range API, to help developers comply while protecting user privacy.
How to Work with SwiftData in the Background in Swift 6
It explains how to update SwiftData models safely in the background in Swift 6 using a ModelActor, proxy structs, and PersistentIdentifier.
The author triggers a detached task after save, fetches lightweight data via the actor, writes the result back, and lets SwiftUI refresh via the @Query macro.
It explains how to update SwiftData models safely in the background in Swift 6 using a ModelActor, proxy structs, and PersistentIdentifier.
The author triggers a detached task after save, fetches lightweight data via the actor, writes the result back, and lets SwiftUI refresh via the @Query macro.
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SwiftUI Tip
When applying the Liquid Glass design to your custom views, you can even use custom shapes with the glassEffect() modifier.
When applying the Liquid Glass design to your custom views, you can even use custom shapes with the glassEffect() modifier.
SIXT (Munich, Germany, hybrid)
- hybrid working model with flexible hours
- Part-time
SIXT SE is a global mobility service provider founded in Germany, operating in over 110 countries with around 9,000 employees, €4 billion in revenue, and a fleet of 350,000 vehicles across its ONE platform including SIXT rent, share, ride, and SIXT+.
Working Student iOS (Swift)
_______________________
Daily REMOTE iOS job updates + iOS interview prep materials on the private Patreon page
“iOS (Swift) Jobs” → https://patreon.com/iOSjobs
Join for just €2(+VAT)/ month - about the price of a coffee ☕️
- hybrid working model with flexible hours
- Part-time
SIXT SE is a global mobility service provider founded in Germany, operating in over 110 countries with around 9,000 employees, €4 billion in revenue, and a fleet of 350,000 vehicles across its ONE platform including SIXT rent, share, ride, and SIXT+.
Working Student iOS (Swift)
_______________________
Daily REMOTE iOS job updates + iOS interview prep materials on the private Patreon page
“iOS (Swift) Jobs” → https://patreon.com/iOSjobs
Join for just €2(+VAT)/ month - about the price of a coffee ☕️
Implementing a Refractive Glass Shader in Metal
The article explains how to build a realistic refractive glass shader in Metal for SwiftUI, covering refraction, center-weighted falloff, shadow/occlusion, edge lighting, and subtle chromatic aberration. The author provides code snippets and shows how to wire it with .layerEffect.
What it does, step by step:
- Refraction: Fake light bending by offsetting the background sample in the fragment shader; distortion eases toward the edge.
- Magnification: Same idea can act as a “liquid magnifier” with a crisp rim via clamping.
- SwiftUI integration: Render with .layerEffect(...); increase maxSampleOffset so shadows/refraction aren’t clipped.
- Shadow & occlusion: Add a soft, slightly offset shadow outside the glass (using smoothstep) to ground the object.
- Edge lighting: Rim light based on distance to the boundary; modulate brightness by a fake light direction (dot).
- Chromatic aberration: Sample R and B with slightly different offsets (stronger near the edge); G stays central - works best on light content.
Result: Combined effects give convincing thickness and a glassy feel.
The article explains how to build a realistic refractive glass shader in Metal for SwiftUI, covering refraction, center-weighted falloff, shadow/occlusion, edge lighting, and subtle chromatic aberration. The author provides code snippets and shows how to wire it with .layerEffect.
What it does, step by step:
- Refraction: Fake light bending by offsetting the background sample in the fragment shader; distortion eases toward the edge.
- Magnification: Same idea can act as a “liquid magnifier” with a crisp rim via clamping.
- SwiftUI integration: Render with .layerEffect(...); increase maxSampleOffset so shadows/refraction aren’t clipped.
- Shadow & occlusion: Add a soft, slightly offset shadow outside the glass (using smoothstep) to ground the object.
- Edge lighting: Rim light based on distance to the boundary; modulate brightness by a fake light direction (dot).
- Chromatic aberration: Sample R and B with slightly different offsets (stronger near the edge); G stays central - works best on light content.
Result: Combined effects give convincing thickness and a glassy feel.
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