Practical iOS Development Guides

Every iOS app needs structure, storage, security, and a way to talk to the network. The articles here cover the patterns and frameworks Apple provides — from which architecture to choose, through how to persist data, to how to handle authentication and push notifications.

Architecture & Patterns

• iOS Architectural Patterns Deep Dive — MVC, MVVM, TCA, VIPER, Coordinators, and Clean Architecture with diagrams and code.

Persistence

• A Complete Guide to iOS Data Persistence — SwiftData, CoreData, GRDB, UserDefaults, Keychain, File System + Codable compared.
• SwiftData Migrations — Lightweight and complex migrations with SchemaMigrationPlan and testing.
• SwiftData or CoreData in 2026 — When to use each framework with side-by-side code.

Security

• Biometric Authentication Deep Dive — Face ID, Touch ID, LAContext, Keychain integration, SwiftUI patterns, and testing.

Networking & Services

• Push Notifications — Registration, payloads, rich media, Live Activities, and testing.
• Deep Linking — URL schemes, Universal Links, AASA files, and handling incoming links.
• In-App Web Browser — WKWebView, SFSafariViewController, and ASWebAuthenticationSession compared.

In-App Purchases

• In-App Purchases with StoreKit 2 — Products, transactions, SwiftUI store views, testing, and subscriptions.

Dependencies

• iOS Dependency Managers — SwiftPM, CocoaPods, Carthage — which to use in 2026 and how to migrate.
• iOS Dependency Formats — Swift Packages, XCFrameworks, dynamic and static libraries explained.

Concurrency

• Data Race vs Race Condition — The distinction between the two bugs with locks and actors.
• Grand Central Dispatch (GCD) — Queues, QoS, barriers, groups, and dispatch sources.
• Operation Queues — Operation/OperationQueue, dependencies, KVO, and cancellations.

SwiftUI & UIKit

• Modality in iOS — Alerts, popovers, sheets, and action sheets reference.

Tooling

• Xcode Build Configurations (xcconfig) — Managing build settings with .xcconfig files.
• Uninstall Xcode Completely — Clean removal and cache clearing steps.

Interview Prep

• iOS Interview Guide — Process overview, portfolio tips, and common topics.
• Swift Interview Questions — Language fundamentals, concurrency, and advanced features.
• SwiftUI Interview Questions — Views, state management, navigation, and performance.
• UIKit Interview Questions — UIKit fundamentals, responder chain, and layout.