Swift

Swift

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Last Update	09/17/2026
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Section 1: Getting Started

3Lessons ·
- 1: Setting Up Xcode and Swift Playgrounds
  
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- 2: Anatomy of a Swift Program
  
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- 3: Swift Package Manager Basics
  
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Section 2: Core Syntax

6Lessons ·
- 4: Variables and Constants
  
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- 5: Basic Types and Type Inference
  
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- 6: Control Flow Statements
  
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- 7: Functions and Closures
  
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- 8: Tuples in Swift
  
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- 9: String Interpolation and Manipulation
  
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Section 3: Optionals

5Lessons ·
- 10: Understanding Optionals
  
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- 11: Optional Binding and Unwrapping
  
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- 12: Guard Statements
  
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- 13: Optional Chaining
  
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- 14: Nil Coalescing Operator
  
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Section 4: Object-Oriented and Value Types

7Lessons ·
- 15: Structs vs Classes
  
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- 16: Properties and Methods
  
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- 17: Computed Properties and Property Observers
  
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- 18: Inheritance and Polymorphism
  
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- 19: Protocols and Protocol Extensions
  
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- 20: Enums with Associated Values
  
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- 21: Extensions in Swift
  
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Section 5: Memory Management

4Lessons ·
- 22: Automatic Reference Counting Explained
  
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- 23: Strong, Weak, and Unowned References
  
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- 24: Avoiding Retain Cycles
  
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- 25: Value Semantics and Copy-on-Write
  
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Section 6: Generics and Error Handling

5Lessons ·
- 26: Generic Functions and Types
  
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- 27: Generic Constraints
  
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- 28: Error Handling with throws and try
  
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- 29: Result Type
  
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- 30: Custom Error Types
  
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Section 7: Concurrency

4Lessons ·
- 31: Grand Central Dispatch Basics
  
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- 32: async/await in Swift
  
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- 33: Actors and Data Race Safety
  
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- 34: Task Groups and Structured Concurrency
  
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Section 8: Working with Collections

3Lessons ·
- 35: Arrays, Sets, and Dictionaries
  
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- 36: Higher-Order Functions: map, filter, reduce
  
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- 37: Sequence and Collection Protocols
  
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Section 9: Codable and Data Handling

5Lessons ·
- 38: Encoding and Decoding with Codable
  
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- 39: Custom Coding Keys and Strategies
  
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- 40: Working with JSON in Swift
  
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- 41: Property Wrappers Explained
  
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- 42: Building a Custom Property Wrapper
  
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Section 10: Protocol-Oriented Programming

4Lessons ·
- 43: Protocol-Oriented Design Philosophy
  
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- 44: Protocol Composition
  
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- 45: Associated Types in Protocols
  
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- 46: Conditional Conformance
  
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Section 11: Testing and Tooling

4Lessons ·
- 47: Unit Testing with XCTest
  
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- 48: UI Testing Basics
  
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- 49: Swift Package Manager for Libraries
  
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- 50: Documentation Comments and DocC
  
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Section 12: Practical Projects

5Lessons ·
- 51: Building a Command-Line Tool in Swift
  
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- 52: Building a Simple Networking Layer
  
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- 53: Building a Small Data Model with Codable
  
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- 54: Building a Local Persistence Layer
  
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- 55: Building a Simple Server-Side Swift API with Vapor
  
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Section 13: Interview Practice

2Lessons ·
- 56: Common Swift Interview Questions on Value Semantics
  
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- 57: Common Swift Interview Questions on ARC and Memory
  
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Section 14: More Practice Exercises

4Lessons ·
- 58: Practice Exercise: Building a Command-Line Contact Manager
  
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- 59: Practice Exercise: Building a Simple Weather Data Model with Codable
  
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- 60: Practice Exercise: Building a Generic Result-Based Networking Layer
  
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- 61: Practice Exercise: Refactoring Class-Based Code into Value Types
  
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Section 15: More Standard Library

4Lessons ·
- 62: Working with Strings in Depth
  
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- 63: Working with Ranges
  
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- 64: The Sequence and IteratorProtocol
  
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- 65: Sorting and Custom Comparators
  
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Section 16: Advanced Concurrency

3Lessons ·
- 66: Sendable and Data Race Safety
  
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- 67: AsyncSequence and AsyncStream
  
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- 68: Continuations for Bridging Callback APIs
  
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Section 17: Foundation Framework Deep Dive

11Lessons ·
- 69: Data and Its String/Array Conversions
  
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- 70: DateFormatter and ISO8601DateFormatter
  
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- 71: NumberFormatter and MeasurementFormatter
  
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- 72: FileManager for File System Access
  
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- 73: NotificationCenter for Event Broadcasting
  
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- 74: UserDefaults for Simple Persistence
  
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- 75: Calendar and DateComponents
  
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- 76: NSRegularExpression vs Swift Regex
  
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- 77: NSPredicate for Filtering
  
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- 78: Scanner for Parsing Text
  
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- 79: NSCache for In-Memory Caching
  
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Section 18: URLSession and Networking Deep Dive

5Lessons ·
- 80: URLSession Configuration Types
  
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- 81: Data Tasks, Download Tasks, Upload Tasks
  
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- 82: URLSessionDelegate for Advanced Control
  
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- 83: Combine Publishers from URLSession
  
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- 84: async/await with URLSession
  
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Section 19: Combine Framework

5Lessons ·
- 85: Publishers and Subscribers Explained
  
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- 86: Operators: map, filter, combineLatest
  
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- 87: Subjects: PassthroughSubject and CurrentValueSubject
  
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- 88: Error Handling in Combine Pipelines
  
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- 89: Combine vs async/await: When to Use Which
  
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Section 20: SwiftUI Fundamentals for Swift Developers

5Lessons ·
- 90: Declarative UI Concepts in SwiftUI
  
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- 91: State and Binding Property Wrappers
  
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- 92: ObservableObject and @Published
  
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- 93: NavigationStack Basics
  
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- 94: List and ForEach in SwiftUI
  
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Section 21: Server-Side Swift with Vapor

4Lessons ·
- 95: Vapor Routing Basics
  
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- 96: Fluent ORM for Vapor
  
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- 97: Middleware in Vapor
  
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- 98: Authentication in Vapor Applications
  
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Section 22: Swift Package Manager Deep Dive

4Lessons ·
- 99: Package.swift Manifest In Depth
  
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- 100: Creating a Multi-Target Swift Package
  
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- 101: Binary Targets and XCFrameworks
  
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- 102: Publishing a Swift Package
  
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Section 23: Swift Concurrency Deep Dive

5Lessons ·
- 103: Actors and Reentrancy
  
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- 104: Global Actors and @MainActor
  
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- 105: AsyncSequence and AsyncStream Revisited
  
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- 106: Task Groups Revisited with Cancellation Handling
  
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- 107: Data Race Safety with Sendable Types
  
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Section 24: More Language Features

5Lessons ·
- 108: Subscripts in Swift
  
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- 109: Operator Overloading and Custom Operators
  
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- 110: Access Control Levels In Depth
  
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- 111: where Clauses in Generic Constraints
  
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- 112: Type Erasure with AnyObject and any
  
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Section 25: Error Handling Deep Dive

4Lessons ·
- 113: Typed Throws (Swift 6)
  
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- 114: Result Type In Depth
  
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- 115: Recovering from Errors Gracefully
  
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- 116: Defer Statements for Cleanup
  
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Section 26: Testing Deep Dive

4Lessons ·
- 117: The Swift Testing Framework
  
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- 118: Async Testing Patterns
  
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- 119: Mocking with Protocols
  
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- 120: Snapshot Testing for UI
  
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Section 27: Data Structures and Algorithms in Swift

5Lessons ·
- 121: Implementing a Linked List in Swift
  
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- 122: Implementing a Binary Search Tree in Swift
  
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- 123: Implementing a Hash Table in Swift
  
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- 124: Implementing Common Sorting Algorithms
  
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- 125: Big-O Notation with Swift Examples
  
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Section 28: More Practice Exercises

4Lessons ·
- 126: Practice Exercise: Building a Weather App with Combine
  
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- 127: Practice Exercise: Building an Offline-First Data Sync Layer
  
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- 128: Practice Exercise: Building a Custom Result Builder (DSL)
  
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- 129: Practice Exercise: Building a Type-Safe Networking Layer with async/await
  
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Section 29: More Interview Practice

4Lessons ·
- 130: Common Swift Interview Questions on Protocol-Oriented Design
  
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- 131: Common Swift Interview Questions on Concurrency
  
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- 132: Whiteboard Practice: Implementing a Linked List in Swift
  
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- 133: Timed Mock Assessment on Core Swift
  
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Section 30: Swift Macros (Swift 5.9+)

4Lessons ·
- 134: Introduction to Swift Macros
  
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- 135: Writing a Freestanding Macro
  
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- 136: Writing an Attached Macro
  
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- 137: Debugging Macro Expansion
  
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Section 31: Property Wrappers Ecosystem

3Lessons ·
- 138: Building a Custom @Clamped Property Wrapper
  
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- 139: Composing Multiple Property Wrappers
  
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- 140: Property Wrappers with Projected Values
  
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Section 32: Swift Interop Deep Dive

3Lessons ·
- 141: Objective-C Interop Bridging Rules
  
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- 142: C Interop in Swift
  
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- 143: Swift/C++ Interop (Experimental)
  
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Section 33: iOS App Architecture Patterns

4Lessons ·
- 144: MVVM in Swift Applications
  
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- 145: Coordinator Pattern for Navigation
  
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- 146: The Composable Architecture Overview
  
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- 147: Clean Architecture Layering in iOS Apps
  
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Section 34: Performance and Debugging

4Lessons ·
- 148: Instruments for Performance Profiling
  
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- 149: Memory Graph Debugging
  
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- 150: Reducing App Launch Time
  
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- 151: Diagnosing Retain Cycles with Memory Graph
  
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Section 35: App Distribution and CI/CD

4Lessons ·
- 152: Code Signing and Provisioning Explained
  
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- 153: Fastlane for iOS Automation
  
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- 154: TestFlight Distribution Workflow
  
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- 155: App Thinning and Bitcode
  
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Section 36: More Practical Projects

4Lessons ·
- 156: Building a Local-First Notes App with SwiftData
  
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- 157: Building a Simple Widget Extension
  
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- 158: Building a Command-Line Package with Swift Argument Parser
  
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- 159: Building a Watch Complication with WidgetKit
  
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Section 37: SwiftData and Persistence

4Lessons ·
- 160: SwiftData Model Definitions
  
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- 161: Querying with SwiftData Predicates
  
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- 162: Migrating from Core Data to SwiftData
  
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- 163: CloudKit Sync Basics
  
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Section 38: More Design Patterns

4Lessons ·
- 164: The Singleton Pattern in Swift
  
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- 165: The Factory Pattern in Swift
  
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- 166: The Delegate Pattern In Depth
  
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- 167: The Strategy Pattern with Protocols
  
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Section 39: More Review and Practice

4Lessons ·
- 168: Practice Exercise: Building a Type-Safe Analytics Event Logger
  
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- 169: Practice Exercise: Building a Feature Flag System
  
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- 170: Code Review Checklist for Idiomatic Swift
  
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- 171: Interview Practice: System Design Basics for iOS Roles
  
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Section 40: More Foundation Deep Dive

6Lessons ·
- 172: IndexPath and Range Types
  
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- 173: URL and URLComponents In Depth
  
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- 174: ProcessInfo for Environment Access
  
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- 175: Bundle for Resource Access
  
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- 176: OperationQueue vs DispatchQueue
  
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- 177: Timer for Scheduled Execution
  
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Section 41: Advanced Collections in Swift

4Lessons ·
- 178: Custom Collection Conformance
  
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- 179: Lazy Collections in Swift
  
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- 180: OrderedSet and OrderedDictionary (Swift Collections Package)
  
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- 181: Deque from Swift Collections Package
  
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Section 42: Advanced Generics Practice

5Lessons ·
- 182: Generic Subscripts
  
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- 183: Recursive Generic Constraints
  
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- 184: Opaque Types with some Keyword
  
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- 185: Existential Types with any Keyword Revisited
  
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- 186: Primary Associated Types
  
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Section 43: UIKit for Legacy and Hybrid Apps

4Lessons ·
- 187: UIViewController Lifecycle Revisited
  
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- 188: Auto Layout Programmatically
  
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- 189: UIKit and SwiftUI Interop with UIViewRepresentable
  
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- 190: Table View and Collection View Diffable Data Sources
  
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Section 44: watchOS and visionOS Development Basics

4Lessons ·
- 191: Building a Simple watchOS App
  
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- 192: Building a Simple visionOS App
  
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- 193: Spatial Computing Concepts in visionOS
  
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- 194: Hand Tracking and Gestures in visionOS
  
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Section 45: More Networking Patterns

4Lessons ·
- 195: Building a Type-Safe API Client Layer
  
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- 196: Handling Pagination in Network Requests
  
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- 197: Certificate Pinning in URLSession
  
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- 198: WebSocket Communication in Swift
  
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Section 46: More Testing Practice

4Lessons ·
- 199: UI Testing with XCUITest In Depth
  
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- 200: Test Plans and Test Configurations
  
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- 201: Code Coverage Analysis in Xcode
  
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- 202: Continuous Integration for iOS with Xcode Cloud
  
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Section 47: Accessibility in Swift Apps

5Lessons ·
- 203: VoiceOver Support in SwiftUI
  
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- 204: Dynamic Type Support
  
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- 205: Accessibility Identifiers for Testing
  
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- 206: Reduce Motion and Accessibility Settings
  
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- 207: Accessibility Auditing with Xcode Accessibility Inspector
  
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Section 48: Localization

4Lessons ·
- 208: String Catalogs for Localization
  
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- 209: Pluralization Rules with Localization
  
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- 210: Right-to-Left Layout Support
  
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- 211: Testing Localized Apps with Different Locales
  
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Section 49: More Practical Projects Round 2

5Lessons ·
- 212: Building a Habit Tracker with SwiftData and Charts
  
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- 213: Building a Recipe App with Async Image Loading
  
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- 214: Building a Simple Journaling App with CloudKit Sync
  
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- 215: Building a Multiplayer Game Lobby with GameKit
  
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- 216: Building a Split-View Master-Detail App for iPad
  
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Section 50: Swift Charts Framework

4Lessons ·
- 217: Building Bar and Line Charts with Swift Charts
  
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- 218: Customizing Chart Marks and Axes
  
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- 219: Interactive Charts with Gestures
  
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- 220: Real-Time Data Updates in Swift Charts
  
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Section 51: More Interview and Algorithm Practice

5Lessons ·
- 221: Solving Array and String Problems in Swift
  
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- 222: Solving Tree and Graph Problems in Swift
  
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- 223: Common Swift Interview Questions on Value Semantics Revisited
  
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- 224: Common Swift Interview Questions on Generics
  
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- 225: Mock Coding Interview Walkthrough in Swift
  
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Section 52: Final Practice and Mastery

8Lessons ·
- 226: Practice Exercise: Building a Custom Animation with SwiftUI
  
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- 227: Practice Exercise: Building a Drag-and-Drop Interface in SwiftUI
  
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- 228: Practice Exercise: Building a Custom ViewModifier
  
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- 229: Practice Exercise: Building a Reusable Design System Component Library
  
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- 230: Practice Exercise: Building a Custom PreferenceKey for View Communication
  
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- 231: Practice Exercise: Building a Type-Safe Deep Linking System
  
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- 232: Practice Exercise: Building a Custom Layout with the Layout Protocol
  
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- 233: Practice Exercise: Building an Offline Queue for Failed Network Requests
  
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Section 53: Swift Compiler and Build System

5Lessons ·
- 234: Understanding Swift's Compilation Model
  
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- 235: Whole Module Optimization
  
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- 236: Build Time Optimization Techniques
  
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- 237: Swift Build (Experimental Build System)
  
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- 238: Reducing Binary Size for iOS Apps
  
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Section 54: More Concurrency Practice

4Lessons ·
- 239: Practice Exercise: Building a Concurrent Image Downloader with Caching
  
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- 240: Practice Exercise: Building an Actor-Based Rate Limiter
  
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- 241: Isolation Regions and Sendable Checking
  
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- 242: Debugging Data Races with Thread Sanitizer
  
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Section 55: App Store Guidelines and Review

4Lessons ·
- 243: Common App Store Review Rejection Reasons
  
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- 244: Privacy Manifest Requirements
  
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- 245: In-App Purchase Compliance Checklist
  
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- 246: App Tracking Transparency Implementation
  
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Section 56: More Design and Architecture

4Lessons ·
- 247: Modularizing a Large Swift App with Swift Packages
  
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- 248: Dependency Injection Patterns in Swift
  
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- 249: Feature Modules and Micro-App Architecture
  
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- 250: Interview Practice: System Design for a Social Media iOS App
  
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