🔰Access Control

⭐️ 重點

存取控制最重要的兩個分野為 module 和 source file：

• module：一個 bundle ID 下的 app 或一個 framework。

• source file：就是每一個 .swift 檔案。

分 5 個層級，最高到最低依次為：

• open / public / internal / file-private / private

fileprivate

The only reason you would use fileprivate is when you want to access your code within the same file from different classes or structs. 👉 SwfitLee

// fileprivate setter
fileprivate(set) var a = 1

private

extensions have to be defined within the same file, private declarations are not visible outside the file.

📘 手冊

• Swift ⟩ Access Control

📗 參考

• Jerry Wang ⟩ Access Control 教學

• SwiftLee ⟩ fileprivate vs private in Swift: The differences explained

🗣 討論

• What's the difference of private and fileprivate class in the same file in Swift?