README.md

How to navigate from one view flow into another

Say you want to go through some onboarding flow.

And once complete switch views over to your main app.

Define an ObservableObject called AppState and pass it down as an EnvironmentObject to all your subviews.

import SwiftUI

// Define your observable
class AppState: ObservableObject {
    @Published var hasOnboarded: Bool

    init(hasOnboarded: Bool) {
        self.hasOnboarded = hasOnboarded
    }
}

// Load it into your app
@main
struct DemoApp: App {
    @StateObject var appState = AppState(hasOnboarded: false)
    
    var body: some Scene {
        WindowGroup {
            if appState.hasOnboarded {
                MainFlowView()
                    .environmentObject(appState)
            } else {
                OnboardingFlowView()
                    .environmentObject(appState)
            }
        }
    }
}

struct OnboardingFlowView: View {
    @EnvironmentObject var appState: AppState
    
    var body: some View {
        TabView {
            Text("First")
            Text("Second")
            Text("Third")
            Button("Done") {
                appState.hasOnboarded = true // change
            }
        }
        .tabViewStyle(.page)
        .indexViewStyle(.page(backgroundDisplayMode: .always))
    }
}

struct MainFlowView: View {
    @EnvironmentObject var appState: AppState
    
    var body: some View {
        VStack {
            Text("Main")
            Button("Reset") {
                appState.hasOnboarded = false // change
            }
        }
    }
}