Welcome to your first step toward becoming an iOS developer! Whether you’re new to programming or have tried and failed before, the 100 Days of Swift is designed to guide you, motivate you, and get you building real-world apps — all in just 100 days.

Crafted by Paul Hudson and hosted on Hacking with Swift, this free, beginner-focused curriculum mixes daily Swift tutorials, iOS projects, tests, and review sessions. It’s your structured path to building confidence and skill in Swift programming and UIKit app development.

💡 Want to learn SwiftUI instead? Consider the newer 100 Days of SwiftUI for a modern take on Swift app building.

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📜 Course Philosophy: Learn by Doing, Every Single Day

The formula for success is simple:

• 1 hour of Swift learning every day – read, code, or watch videos.
• Share your journey daily – tweet, blog, post, or document your progress publicly.

This consistency fuels momentum and builds a habit of learning. The rest? Taken care of for you.

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✅ Success Tips from Paul Hudson

Here’s how to maximize your learning throughout the course:

• 🐢 Pace yourself: Don’t sprint. Build strong fundamentals.
• 💸 Avoid shiny object syndrome: No need to jump into paid courses.
• 🧑‍🤝‍🧑 Stay connected: Ask for help! Tweet @twostraws with questions.
• 🧠 Use consolidation days: These let you review, reinforce, and reflect.
• 📚 Bookmark the Swift Glossary: It’s a goldmine of definitions.
• 📲 Download Unwrap App: Learn on iPhone or iPad with quizzes and exercises.

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🗓️ The 100-Day Roadmap

Each segment focuses on hands-on projects, punctuated by review milestones to solidify your skills. Let’s break it down:

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📘 Days 1–12: Swift Fundamentals

Start with the building blocks of Swift using quick videos and quizzes.

Day	Topics
1	Variables, strings
2	Arrays, dictionaries, sets
3	Operators, conditions
4	Loops
5	Functions, parameters, errors
6–7	Closures
8	Structs, methods
9	Access control, static properties
10	Classes, inheritance
11	Protocols, extensions
12	Optionals, typecasting

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🔁 Days 13–15: Swift Consolidation I

Refine your understanding and revisit tricky parts.

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📱 Days 16–22: Your First iOS Apps

Build simple apps using UIKit and your new Swift knowledge.

Project	Focus
1	Basic app layout
2	Interactive app
3	Data and logic integration

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🔁 Day 23: iOS Milestone I

Review Projects 1–3. Debug, reflect, and polish.

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🌐 Days 24–31: Web Views, Auto Layout, and Input

Dive deeper with three new apps that explore:

• WebKit
• Alerts
• User input forms
• Auto Layout

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🔁 Day 32: Milestone II

Projects 4–6 wrapped and reviewed.

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📡 Days 33–40: Networking & Multithreading

Explore:

• Codable for decoding JSON
• DispatchQueue and GCD
• Asynchronous code

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🔁 Day 41: Milestone III

Time to reflect on Projects 7–9.

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🎮 Days 42–49: Games & Grids

New interfaces and game logic using:

• UICollectionView
• SpriteKit
• Saving user data

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🔁 Days 50–51: Milestone IV + Expansion

Review Projects 10–12 and get introduced to new ideas.

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🎨 Days 52–58: Animations & Core Image

Learn:

• Image manipulation
• Animation
• UIKit dynamics

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🔁 Day 59: Milestone V

Projects 13–15 in review.

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🗺️ Days 60–65: Maps and Debugging

Master:

• MapKit
• Breakpoints and LLDB
• Debugging strategies

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🔁 Day 66: Milestone VI

Reflect on Projects 16–18.

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💪 Days 67–73: Advanced Challenges

Build powerful tools and handle complexity like a pro.

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🔁 Day 74: Milestone VII

Review Projects 19–21.

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🛰️ Days 75–81: Beacons and UI Effects

Dig into:

• iBeacons
• CoreLocation
• Bezier paths and animation

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🔁 Day 82: Milestone VIII

Projects 22–24 review.

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🔌 Days 83–89: Multipeer and Motion

Explore peer-to-peer connectivity and motion sensors.

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🔁 Days 90–91: Milestone IX + Redux

Recap Projects 25–27, and reinforce Core Graphics.

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🧠 Days 92–98: Performance, Face ID, and Mixing Frameworks

Advanced topics:

• Face ID authentication
• SpriteKit + UIKit integration
• Instruments for performance tuning

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🔁 Day 99: Final Milestone

Review Projects 28–30, then prep for your final challenge.

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🎓 Day 100: Final Exam + Epilogue

The ultimate test of your skills! Take the final exam and reflect on your journey. You’re now ready to explore the next frontier of iOS development.

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🧭 Where to Go From Here?

Now that you’ve completed the challenge, here are some paths forward:

• 🔄 100 Days of SwiftUI
• 💻 Build your portfolio with advanced UIKit
• 👨‍🏫 Contribute to open-source Swift projects

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See also

• 📱 Swift Language Guide — Apple’s official reference
• 🧩 UIKit Documentation — Apple’s legacy framework for building UI
• 🧪 Swift Playgrounds — Learn Swift interactively on iPad or Mac

You may also enjoy

• 🎮 Make Your First iOS Game
• 🧠 Design Patterns in Swift
• 💼 iOS Developer Interview Prep