Value Type vs Reference Type

• struct, enum은 value 타입
• class는 reference 타입

클래스의 추가 기능

• Inheritance enables one class to inherit the characteristics of another.
• Type casting enables you to check and interpret the type of a class instance at runtime.
• Deinitializers enable an instance of a class to free up any resources it has assigned.
• Reference counting allows more than one reference to a class instance.

• 상속
• 타입캐스팅
• 해제
• RC

언제 쓰면 좋은지

• struct를 선호
• 필요할때만 class 사용

링크

https://docs.swift.org/swift-book/LanguageGuide/ClassesAndStructures.html
https://developer.apple.com/documentation/swift/choosing_between_structures_and_classes