Swift
Apple's modern language for iOS, macOS, and other Apple platforms.
CurrentintermediateGuide only -- no course yet
Overview
Swift is Apple's statically-typed, memory-safe language, replacing Objective-C as the primary language for iOS/macOS development. It emphasizes safety (optionals instead of null pointers) and modern syntax while compiling to fast native code.
- What it is
- A statically-typed, compiled language used primarily for Apple platform (iOS, macOS) development.
- Why it's used
- It's Apple's officially recommended language for new iOS/macOS apps, with strong safety guarantees and first-class tooling (Xcode).
- Where it fits
- The starting point for native iOS development, typically paired with SwiftUI or UIKit.
Core concepts
- Optionals (safe handling of absent values)
- Structs vs. classes
- Protocols
- SwiftUI's declarative UI model
Example
String? is an optional -- a value that might be nil -- and guard let safely unwraps it; Swift's compiler forces you to handle the absent case explicitly, preventing an entire class of crashes.
func greet(name: String?) -> String {
guard let name = name else { return "Hello!" }
return "Hello, \(name)!"
}Common use cases
- Native iOS apps
- Native macOS apps
Project ideas
- A simple SwiftUI view with a button that updates displayed text