Learn SWIFT with Real Code Examples
Updated Nov 21, 2025
Installation Setup
Install Xcode on macOS for development
Command-line tools available for Swift via swift.org
Use Swift Package Manager (SPM) for dependencies
Optional IDEs: AppCode or Visual Studio Code with Swift extensions
Run code via Xcode simulator or real devices
Environment Setup
Xcode installed on macOS
Swift compiler from swift.org
Simulator or physical device for testing
Swift Package Manager for dependencies
Playgrounds for experimentation
Config Files
Package.swift - Swift Package Manager
Info.plist - app configuration
Podfile - CocoaPods dependencies
Cartfile - Carthage dependencies
project.xcodeproj / .xcworkspace - Xcode project files
Cli Commands
swift run - execute Swift program
swift build - compile Swift project
swift test - run tests
swift package init - initialize SPM package
xcodebuild - build Xcode project from CLI
Internationalization
Use NSLocalizedString for localization
Localize UI elements and resources
Support multiple locales
Adapt date, time, and number formats
SwiftGen can automate resource handling
Accessibility
Add accessibility labels and hints
Support VoiceOver navigation
Dynamic type for font sizes
High contrast and colorblind support
Test accessibility in Xcode simulator
Ui Styling
SwiftUI modifiers for declarative styling
UIKit: storyboard and programmatic UI
Dark mode support with Color and Assets
Animations with SwiftUI transitions or UIKit animations
Responsive layouts using GeometryReader or AutoLayout
State Management
SwiftUI: @State, @Binding, @ObservedObject, @EnvironmentObject
Combine for reactive streams
UserDefaults or Core Data for persistence
Protocols for delegation
Structs and classes for local state
Data Management
Use Codable for JSON serialization
Core Data for local database
Combine publishers for reactive updates
Networking with URLSession or third-party libraries
Cache data efficiently for offline support