Learning Time : 1h 15min

My Github : Bucket List Source Code

My Note index link

KeyWords

• MVVM
  • ViewModel
  • ObservableObject
  • @MainActor
• documentDirectory
  • load data、save data
• LocalAuthentication
  • Permissions
  • Task & @MainActor
  • Simulator test

Introducing MVVM into your SwiftUI project

• MVVM (Model View View-Model) architecture, a design pattern essential for structuring SwiftUI projects effectively.
• MVVM allows you to separate your data management and logic from your user interface, enhancing maintainability and testability.

Create ViewModel Class

• Create a new Swift file called ContentView-ViewModel.swift.
• Place the **ViewModel** class inside an **extension** on ContentView.
• Define a class conforming to the ObservableObject protocol.
• Add the **@MainActor** attribute to the ViewModel class, ensuring all code within the class runs on the main actor. This is essential for safe UI updates.