Roadmap / Swift
Master Swift — Apple's modern, safe, and expressive language for iOS, macOS, and server-side development — from Xcode setup to App Store deployment.
Step 1 • setup
Install Xcode, explore Swift Playgrounds for quick experimentation, and understand how Swift Package Manager manages dependencies.
Step 2 • fundamentals
Learn Swift's type system, constants vs variables, string interpolation, enums, tuples, and all control flow constructs including pattern matching in switch.
Step 3 • fundamentals
Understand Swift's optional type, the difference between if let and guard let, optional chaining (?.), forced unwrapping risks, and the nil coalescing operator.
Step 4 • fundamentals
Master Swift closure syntax, capturing semantics, trailing closure shorthand, @escaping vs non-escaping, and using closures with collection higher-order functions.
Step 5 • fundamentals
Learn Swift's protocol-oriented programming paradigm, the difference between value types (struct) and reference types (class), protocol conformance, and default protocol implementations via extensions.
Step 6 • intermediate
Master Swift's Protocol-Oriented Programming paradigm — the dominant Swift design philosophy. Define protocols with method and property requirements. Use protocol extensions to provide default implementations. Apply protocol composition (SomeProtocol & AnotherProtocol) and conditional conformance. Understand Equatable, Hashable, Comparable, Codable, and Identifiable. Use Opaque Types (some Protocol) and Existentials (any Protocol) introduced in Swift 5.7.
Step 7 • intermediate
Write reusable generic functions and types, use type constraints with where clauses, and understand associated types in protocols — the foundation for understanding the Swift standard library.
Step 8 • intermediate
Model errors with typed enums conforming to Error, use do-try-catch for recoverable errors, and leverage the Result type for async callbacks and functional error propagation.
Step 9 • intermediate
Use Swift's modern concurrency system: async/await, Task groups for parallel work, actors for safe state isolation, @MainActor for UI updates, and AsyncSequence for streaming data.
Step 10 • intermediate
Understand Automatic Reference Counting, detect and fix retain cycles with weak/unowned references, use capture lists in closures, and profile memory with Instruments Leaks and Allocations.
Step 11 • advanced
Build declarative UIs with SwiftUI: views, modifiers, layouts (HStack/VStack/Grid), state management (@State, @Binding, @Observable macro), NavigationStack, and List/ForEach.
Step 12 • advanced
Persist app data with SwiftData (Swift 5.9+): define @Model classes, query with @Query in SwiftUI views, handle migrations, and use UserDefaults for lightweight key-value storage. Understand when to fall back to CoreData.
Step 13 • advanced
Fetch and decode JSON APIs using URLSession with async/await, define Codable models with custom CodingKeys, handle HTTP errors, and build a reusable NetworkService layer.
Step 14 • advanced
Structure production iOS apps with MVVM (ViewModel drives SwiftUI views), Clean Architecture layers (Domain/Data/Presentation), protocol-based dependency injection for testability, and the Coordinator pattern for navigation.
Step 15 • advanced
Write unit and integration tests using XCTest and the new Swift Testing framework (@Test, @Suite, #expect), mock dependencies via protocol injection, and test async code with async test methods.
Step 16 • advanced
Configure App Store Connect, set up automatic signing, archive and upload builds, distribute via TestFlight for beta testing, and submit for App Store review with metadata and screenshots.
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