Review Your Learning
Test yourself
As you progress learning Swift it's a good idea to stop and double-check everything is sinking in, so here you can find questions and answers about a range of Swift language and iOS development topics. Don't worry if you make mistakes: your answers aren't stored online, and you can always revisit topics as needed.
Swift in Sixty Seconds
| Simple Types |
|---|
| Variables |
| Strings and integers |
| Multi-line strings |
| Doubles and booleans |
| String interpolation |
| Constants |
| Type annotations |
| Simple types: Summary |
| Complex Types |
|---|
| Arrays |
| Sets |
| Tuples |
| Arrays vs sets vs tuples |
| Dictionaries |
| Dictionary default values |
| Creating empty collections |
| Enumerations |
| Enum associated values |
| Enum raw values |
| Complex types: Summary |
| Operators and conditions |
|---|
| Arithmetic operators |
| Operator overloading |
| Compound assignment operators |
| Comparison operators |
| Conditions |
| Combining conditions |
| The ternary operator |
| Switch statements |
| Range operators |
| Operators and conditions: Summary |
| Looping |
|---|
| For loops |
| While loops |
| Repeat loops |
| Exiting loops |
| Exiting multiple loops |
| Skipping items |
| Infinite loops |
| Looping: Summary |
| Functions |
|---|
| Writing functions |
| Accepting parameters |
| Returning values |
| Parameter labels |
| Omitting parameter labels |
| Default parameters |
| Variadic functions |
| Writing throwing functions |
| Running throwing functions |
| inout parameters |
| Functions: Summary |
| Closures |
|---|
| Creating basic closures |
| Accepting parameters in a closure |
| Returning values from a closure |
| Closures as parameters |
| Trailing closure syntax |
| Using closures as parameters when they accept parameters |
| Using closures as parameters when they return values |
| Shorthand parameter names |
| Closures with multiple parameters |
| Returning closures from functions |
| Capturing values |
| Closures: Summary |
| Structs |
|---|
| Creating your own structs |
| Computed properties |
| Property observers |
| Methods |
| Mutating methods |
| Properties and methods of strings |
| Properties and methods of arrays |
| Initializers |
| Referring to the current instance |
| Lazy properties |
| Static properties and methods |
| Access control |
| Structs: Summary |
| Classes |
|---|
| Creating your own classes |
| Class inheritance |
| Overriding methods |
| Final classes |
| Copying objects |
| Deinitializers |
| Mutability |
| Classes: Summary |
| Protocols |
|---|
| Protocols |
| Protocol inheritance |
| Extensions |
| Protocol extensions |
| Protocol-oriented programming |
| Protocols and extensions: Summary |
| Optionals |
|---|
| Handling missing data |
| Unwrapping optionals |
| Unwrapping with guard |
| Force unwrapping |
| Implicitly unwrapped optionals |
| Nil coalescing |
| Optional chaining |
| Optional try |
| Failable initializers |
| Typecasting |
| Optionals: Summary |
Hacking with Swift
| Project 1: Storm Viewer |
| Project 2: Guess the Flag |
| Project 3: Social media |
| Project 4: Easy Browser |
| Project 5: Word Scramble |
| Project 6: Auto Layout |
| Project 7: Whitehouse Petitions |
| Project 8: 7 Swifty Words |
| Project 9: Grand Central Dispatch |
| Project 10: Names to Faces |
| Project 11: Pachinko |
| Project 12: UserDefaults |
| Project 13: Instafilter |
| Project 14: Whack-a-Penguin |
| Project 15: Animation |
| Project 16: Capital Cities |
| Project 17: Space Race |
| Project 18: Debugging |
| Project 19: JavaScript Injection |
| Project 20: Fireworks Night |
| Project 21: Local Notifications |
| Project 22: Detect-a-Beacon |
| Project 23: Swifty Ninja |
| Project 24: Swift Strings |
| Project 25: Selfie Share |
| Project 26: Marble Maze |
| Project 27: Core Graphics |
| Project 28: Secret Swift |
| Project 29: Exploding Monkeys |
| Project 30: Instruments |
Hacking with iOS – SwiftUI Edition
| WeSplit |
| Guess the Flag |
| Views and Modifiers |
| BetterRest |
| Word Scramble |
| Animation |
| iExpense |
| Moonshot |
| Navigation |
| Cupcake Corner |
| Bookworm |
| SwiftData |
| Instafilter |
| Bucket List |
| Accessibility |
| Hot Prospects |
| Flashzilla |
| Layout and geometry |
| SnowSeeker |
| Drawing |
| Core Data |
FAQ
Q: Where are my scores stored?
A: Your scores are stored using your web browser's local storage, so no one else can see them – they are just there so you can monitor your progress.
Q: What do I get if I complete all the reviews?
A: You get the warm glow of knowing you've mastered the fundamentals of Swift – good job!
Q: Where can I go to learn more?
A: Each of the review sections are designed to follow my Swift in Sixty Seconds and Hacking with Swift series, which are free online. If you complete all these and want to push your Swift skills further, you should read my book Pro Swift.
Q: What's stopping me from cheating?
A: I'm sure you could look up the correct answers as you go, but you're only cheating yourself – your scores aren't public.
Q: Where can I report mistakes?
A: If you spot mistakes in the questions, please either email me at paul@hackingwithswift.com or tweet me @twostraws.
