🚦data flow

SwiftUI ⟩ Data Flow ⟩

🔴 主題

• ＠State

• ＠Binding

• @StateObject

• ObservableObject

• Preferences

• @Environment

⭐️ 重點

// value type    : ■ internal, □ external
// reference type: ● internal, ○ external

@State private var isOn = true                // ■
@Binding var isOn: Bool                       // □

@StateObject private var user = User()        // ●
@ObservedObject var user: User                // ○
@EnvironmentObject var modelData: ModelData   // ○

📗 參考

• Sarun ⟩

  • What is @Environment in SwiftUI #todo

  • Data in SwiftUI ⟩ Part 1, Part 2, Part 3

• Hacking with Swift ⟩

  • All SwiftUI property wrappers explained and compared

  • What is @StateObject?, @ObservedObject?

• matteomanferdini ⟩ The Strategic SwiftUI Data Flow Guide ⭐️

• Majid ⟩ The difference between @StateObject, @EnvironmentObject, and @ObservedObject in SwiftUI #todo

• FIVE STAR ⟩ Every SwiftUI Environment Value explained #todo

• Sundell ⟩ A guide to SwiftUI’s state management system

• SwiftUI ⟩ Lab Safely Updating The View State

📘 手冊

• WWDC2019 ⟩ Data Flow Through SwiftUI

📙 書籍

• Working with Data in SwiftUI #todo