Latest articles on Swift, SwiftUI and Apple platform engineering from the iOS Dev India community.https://www.iosdev.inhttps://www.iosdev.in/articles/iphone-duo-runtime-hinge-statehttps://www.iosdev.in/articles/iphone-duo-runtime-hinge-stateMaster the iPhone Duo developer challenge of hinge state as continuous runtime dimension: debounce bursts, scope geometry to UIScene.Wed, 07 Oct 2026 00:00:00 GMThttps://www.iosdev.in/articles/fm-serve-production-routinghttps://www.iosdev.in/articles/fm-serve-production-routingfm serve production routing decisions: on-device model vs Private Cloud Compute, keyed on task class and token budget, with instrumentation on both paths.Tue, 06 Oct 2026 00:00:00 GMThttps://www.iosdev.in/articles/swiftpm-sbomhttps://www.iosdev.in/articles/swiftpm-sbomSwiftPM SBOM generation (SE-0509) turns dependency auditing into a deterministic CycloneDX/SPDX build artifact — wire it into CI now.Mon, 05 Oct 2026 00:00:00 GMThttps://www.iosdev.in/articles/dsym-module-trackinghttps://www.iosdev.in/articles/dsym-module-trackingDeduplicated Swift debug info: module tracking drops per-module type metadata from dSYMs, shrinking uploads and crash symbolication pipelines.Sun, 04 Oct 2026 00:00:00 GMThttps://www.iosdev.in/articles/replay-network-tests-swift-testinghttps://www.iosdev.in/articles/replay-network-tests-swift-testingReplay Swift Testing records real HTTP traffic to HAR fixtures and replays it deterministically, replacing live backends and drifting stubs in iOS tests.Sat, 03 Oct 2026 00:00:00 GMThttps://www.iosdev.in/articles/swiftdata-sqlitedata-core-datahttps://www.iosdev.in/articles/swiftdata-sqlitedata-core-dataSwiftData vs Core Data in 2026: which to choose for iOS persistence 2026 — migration control, Core Data predicate reach, and when SQLiteData's direct SQL wins.Fri, 02 Oct 2026 00:00:00 GMThttps://www.iosdev.in/articles/ios-27-1-developer-changeshttps://www.iosdev.in/articles/ios-27-1-developer-changesiOS 27.1 developer changes live in release notes, not marketing. Checkpoint the SDK bump with concurrency diagnostics and Liquid Glass fixes.Thu, 01 Oct 2026 00:00:00 GMThttps://www.iosdev.in/articles/swift-span-hot-pathshttps://www.iosdev.in/articles/swift-span-hot-pathsSwift Span delivers bounds-checked, non-owning views that retire UnsafeBufferPointer from hot-path parsers; unsafe pointers remain only at FFI boundaries.Wed, 30 Sep 2026 00:00:00 GMThttps://www.iosdev.in/articles/weak-capture-nested-closureshttps://www.iosdev.in/articles/weak-capture-nested-closuresSwift's weak self nested closure warning exposes a silent retain cycle: inner [weak self] becomes a strong outer capture. Fix it without over-weakening.Tue, 29 Sep 2026 00:00:00 GMThttps://www.iosdev.in/articles/isolated-any-function-typeshttps://www.iosdev.in/articles/isolated-any-function-typesHow @isolated(any) function types carry the caller's isolation, replacing speculative Task hops in Swift delegate and callback APIs.Mon, 28 Sep 2026 00:00:00 GMThttps://www.iosdev.in/articles/swift-module-selectorshttps://www.iosdev.in/articles/swift-module-selectorsSwift module selectors (SE-0491) write the owning module into type references, replacing import aliases and typealiases for ambiguous types across modules.Sun, 27 Sep 2026 00:00:00 GMThttps://www.iosdev.in/articles/with-task-cancellation-shieldhttps://www.iosdev.in/articles/with-task-cancellation-shieldwithTaskCancellationShield (SE-0504) hides cancellation from cleanup scopes. Use it only for short, bounded critical sections; never network calls.Sat, 26 Sep 2026 00:00:00 GMThttps://www.iosdev.in/articles/iphone-17-multi-windowhttps://www.iosdev.in/articles/iphone-17-multi-windowMigrate an existing iOS app to iPhone 17 multi-window. Move global state to scene scope, derive geometry from the scene, and fix launch-only resize defects.Fri, 25 Sep 2026 00:00:00 GMThttps://www.iosdev.in/articles/liquid-glass-ui-migrationhttps://www.iosdev.in/articles/liquid-glass-ui-migrationMigrate custom controls to the iOS 27 Liquid Glass material system. Treat the material as a compositing contract, not a background color, and measure GPU cost.Thu, 24 Sep 2026 00:00:00 GMThttps://www.iosdev.in/articles/xcode-27-upgrade-errorshttps://www.iosdev.in/articles/xcode-27-upgrade-errorsTriage Xcode 27 build errors by layer: toolchain, package resolution, SDK, and strict concurrency. Land the Swift 6.4 migration without a repo-wide rewrite.Wed, 23 Sep 2026 00:00:00 GMThttps://www.iosdev.in/articles/app-intents-not-in-sirihttps://www.iosdev.in/articles/app-intents-not-in-siriA staged diagnostic for App Intents not appearing in Siri. Separate schema capability, Spotlight indexing, and relevance donations before changing code.Tue, 22 Sep 2026 00:00:00 GMThttps://www.iosdev.in/articles/ios-27-widget-not-updatinghttps://www.iosdev.in/articles/ios-27-widget-not-updatingA systematic diagnostic for the iOS 27 widget not updating problem. Separate budget exhaustion from coalescing, configuration staleness, and provider bugs.Mon, 21 Sep 2026 00:00:00 GMThttps://www.iosdev.in/articles/core-ai-quantization-metricshttps://www.iosdev.in/articles/core-ai-quantization-metricsHow to use coreai-opt tools to perform per-layer weight quantization and measure accuracy degradation on Apple Silicon Neural Engines.Tue, 25 Aug 2026 00:00:00 GMThttps://www.iosdev.in/articles/swiftui-grid-layout-transitionshttps://www.iosdev.in/articles/swiftui-grid-layout-transitionsHow to use AnyLayout and standard animations to seamlessly transition view hierarchies between grids and lists.Mon, 24 Aug 2026 00:00:00 GMThttps://www.iosdev.in/articles/socket-memory-pinning-swifthttps://www.iosdev.in/articles/socket-memory-pinning-swiftHow to pin raw memory buffers and bypass virtual page migrations in high-frequency Swift network programming.Sun, 23 Aug 2026 00:00:00 GMT