🗃️FileManager

⭐️ 重點

document directory vs. bundle resources

• document directory: user contents, read/write.

• bundle resources: app files, readonly.

• Apps on iOS are constrained to a sandbox, they’ve got no access to system files.

• Files on iOS have a path, but you usually only work with a URL object that contains that path.

all iOS apps are sandboxed, which means they run in their own container with a hard to guess directory name. As a result, we can’t (and shouldn’t try to) guess the directory where our app is installed, and instead need to rely on Apple’s API for finding our app’s documents directory.

👉 Paul ⟩ Writing data to the documents directory

🖥️ 影片

iOS Academy ⟩ FileManager Swift 5 Tutorial

Swiftful Thinking ⟩ How to Use FileManager in Swift

Pursuit Core iOS ⟩ FileManager and Documents Directory, Part 1

圖解

📗 參考： File System Programming Guide

read: 👁️ , write: ➕(new), ➖(delete), 📝(edit), 📁(new subfolder)

---------------------------------------------------------------------
directory          👁️➕➖📝 📁        description
---------------------------------------------------------------------
<AppName>.app      ✅❌❌❌ ❌    app’s bundle (app's files & resources)
Documents          ✅✅✅✅ ✅    user files
  └ Inbox          ✅❌✅❌ ❌    files app was asked to open
Library            ✅✅✅✅ ✅    any non-user files
  ├ Caches                      data used to improve performance
  └ Application Support         files app uses to run
tmp                ✅✅✅✅ ✅    temporary files
---------------------------------------------------------------------

An iOS app operating within its own sandbox directory

📘 手冊

• Foundation ⟩ File System ⟩ FileManager ⟩

  • default
  • urls(for:in:) - locate common directories.

📗 參考

• Apple Archive ⟩

  • File System Programming Guide ⭐️
  • File System Advanced Programming Topics
• Swift Playgrounds ⟩ Image Gallery (Data Model: Gathering Image URLs)
• AppyPie ⟩ Working with Files on iOS with Swift ⭐️
• Sundell ⟩ Working with files and folders in Swift
• Pursuit Core iOS ⟩ Persisting Custom Objects to Documents Directory

🗣 討論

• In iOS apps , what's the difference between the main bundle and the documents directory?
• The file couldn’t be opened because you don’t have permission

👥 相關

• app resources are stored in Bundle.

• File System