Modern iOS development with Swift as modern language and SwiftUI for declarative interfaces. MVVM architecture with Combine for reactive programming, state management with property wrappers (@State, @Binding) and full Apple ecosystem integration.
Modern Swift with optionals, closures, async/await and actors
SwiftUI for declarative UI with @State, @Binding, @ObservedObject
UIKit interoperability for existing applications
Combine Framework for reactive programming and data flow
Core Data for persistence with relationships and migrations
URLSession with Codable for networking and JSON parsing
Modern navigation (NavigationStack, sheets, programmatic)
MVVM architecture with property wrappers and protocols
Comprehensive testing (XCTest, UI Testing, mocking, TDD)
Performance with Instruments, memory management (ARC), SwiftUI optimization
The most important concepts to understand this technology and ace your interviews
Swift: optionals, closures, protocols, extensions, generics, property wrappers
Swift concurrency: async/await, actors, structured concurrency, Task
UIKit: UIViewController lifecycle, Auto Layout, UITableView, UICollectionView
SwiftUI: Composables, State (@State, @Binding, @StateObject), Recomposition
Navigation: NavigationStack, NavigationLink, sheets, alerts, programmatic
Architecture: MVVM, protocol-oriented programming, dependency injection
Combine: Publishers, Subscribers, Operators, data flow, @Published
Core Data: entities, relationships, NSFetchedResultsController, migrations
Networking: URLSession, Codable, async/await, error handling, caching
Persistence: UserDefaults, Keychain, FileManager, app-specific storage
Memory management: ARC, weak/strong references, retain cycles
Testing: XCTest, UI Testing, mocking, test doubles, TDD practices
Performance: Instruments, memory leaks, view hierarchy, lazy loading
App lifecycle, scenes, push notifications, background tasks
Swift Package Manager, Xcode, CI/CD, App Store distribution
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