SwiftUIT-5 (Important questions)

Questions:
1. I want to change value throughout the application, how to achieve it in swiftUI?

2. Key Difference Between @Environment and @EnvironmentObject

Q1. I want to change value throughout the application, how to achieve it in swiftUI?

The recommended approach for shared data across the app is to use a @StateObject in a parent view and inject it as an @EnvironmentObject for child views.

Steps:

1. Create a Data Model:

import SwiftUI

class AppState: ObservableObject {
    @Published var sharedValue: String = "Default Value"
}

2. Provide the AppState to the Environment:

@main
struct MyApp: App {
    @StateObject private var appState = AppState()

    var body: some Scene {
        WindowGroup {
            ContentView()
                .environmentObject(appState)
        }
    }
}

3. Access and Modify the Value in Views:

• Parent View:

struct ContentView: View {
    @EnvironmentObject var appState: AppState

    var body: some View {
        VStack {
            Text("Shared Value: \(appState.sharedValue)")
            Button("Change Value") {
                appState.sharedValue = "Updated Value"
            }
            ChildView() // Pass the environment to child views
        }
    }
}

• Child View:

struct ChildView…