### FlowStacks Migration: Previous API Example

Source: https://github.com/johnpatrickmorgan/flowstacks/blob/main/Docs/Migration/Migrating to 1.0.md

Demonstrates the structure of an application using the previous API of FlowStacks, where the Router handled both state management and view building, and the root screen was included in the routes array.

```swift
enum Screen {
  case home
  case numberList
  case numberDetail(Int)
}

struct AppCoordinator: View {
  @State var routes: Routes<Screen> = [.root(.home)]
    
  var body: some View {
    Router($routes, embedInNavigationView: true) { screen, _ in
      switch screen {
      case .home:
        HomeView()
      case .numberList:
        NumberListView()
      case .numberDetail(let number):
        NumberDetailView(number: number)
      }
    }
  }
}
```

--------------------------------

### FlowStacks SwiftUI Navigation Example

Source: https://github.com/johnpatrickmorgan/flowstacks/blob/main/README.md

Demonstrates the usage of FlowStacks for navigation, including push, sheet presentations, and navigating back to the root. It showcases FlowStack, FlowLink, and flowDestination modifiers.

```Swift
import FlowStacks
import SwiftUI

struct ContentView: View {
  @State var path = FlowPath()
  @State var isShowingWelcome = false

  var body: some View {
    FlowStack($path, withNavigation: true) {
      HomeView()
        .flowDestination(for: Int.self, destination: { number in
          NumberView(number: number)
        })
        .flowDestination(for: String.self, destination: { text in
          Text(text)
        })
        .flowDestination(isPresented: $isShowingWelcome, style: .sheet) {
          Text("Welcome to FlowStacks!")
        }
    }
  }
}

struct HomeView: View {
  @EnvironmentObject var navigator: FlowPathNavigator
  
  var body: some View {
    List {
      ForEach(0 ..< 10, id: \.self) {
        FlowLink(value: number, style: .sheet(withNavigation: true), label: { Text("Show \(number)") })
      }
      Button("Show 'hello'") {
        navigator.push("Hello")
      }
    }
    .navigationTitle("Home")
  }
}

struct NumberView: View {
  @EnvironmentObject var navigator: FlowPathNavigator
  let number: Int

  var body: some View {
    VStack(spacing: 8) {
      Text("\(number)")
      FlowLink(
        value: number + 1,
        style: .push,
        label: { Text("Show next number") }
      )
      Button("Go back to root") {
        navigator.goBackToRoot()
      }
    }
    .navigationTitle("\(number)")
  }
}
```

--------------------------------

### FlowStacks Migration: New API Example

Source: https://github.com/johnpatrickmorgan/flowstacks/blob/main/Docs/Migration/Migrating to 1.0.md

Illustrates the updated structure for applications using the new FlowStacks 1.0 API. It shows the decoupling of view building into flowDestination and the exclusion of the root screen from the routes array.

```swift
enum Screen: Hashable {
  case numberList
  case numberDetail(Int)
}

struct AppCoordinator: View {
  @State var routes: [Route<Screen>] = []
    
  var body: some View {
    FlowStack($routes, withNavigation: true) { 
      HomeView()
        .flowDestination(for: Screen.self) { screen in
          switch screen {
          case .numberList:
            NumberListView()
          case .numberDetail(let number):
            NumberDetailView(number: number)
        }
    }
  }
}
```

--------------------------------

### FlowStack Initialization Options

Source: https://github.com/johnpatrickmorgan/flowstacks/blob/main/Docs/Nesting FlowStacks.md

Describes the different ways a FlowStack can be initialized, affecting how it manages navigation state. This includes using a FlowPath, a typed routes array, or no binding.

```swift
1. a binding to a `FlowPath`, which can support any `Hashable` data,
1. a binding to a typed routes array, e.g. `[Route<MyScreen>]`,
1. no binding at all.
```

--------------------------------

### Composable FlowStacks

Source: https://github.com/johnpatrickmorgan/flowstacks/blob/main/README.md

FlowStacks are designed for composability, allowing multiple flow coordinators, each with its own FlowStack, to be presented or pushed from a parent coordinator. Refer to Nesting FlowStacks documentation for more details.

```APIDOC
Child flow coordinators: FlowStacks are composable, enabling parent coordinators to present or push child coordinators, each managing its own FlowStack. See Nesting FlowStacks for details.
```

--------------------------------

### FlowNavigator Convenience Methods

Source: https://github.com/johnpatrickmorgan/flowstacks/blob/main/README.md

Provides convenience methods for easier navigation when interacting with a FlowNavigator, FlowPath, or routes array. These methods include push, presentSheet, presentCover, goBack, goBackToRoot, goBackTo, pop, and dismiss.

```APIDOC
push: Pushes a new screen onto the stack.
presentSheet: Presents a new screen as a sheet.†
presentCover: Presents a new screen as a full-screen cover.†
goBack: Goes back one screen in the stack.
goBackToRoot: Goes back to the very first screen in the stack.
goBackTo: Goes back to a specific screen in the stack.
pop: Pops the current screen if it was pushed.
dismiss: Dismisses the most recently presented screen.

† Pass `embedInNavigationView: true` if you want to be able to push screens from the presented screen.
```

--------------------------------

### FlowNavigator Usage in SwiftUI

Source: https://github.com/johnpatrickmorgan/flowstacks/blob/main/README.md

Demonstrates how to use the FlowNavigator environment object to programmatically control navigation within a FlowStacks-enabled application. Includes methods for pushing views, going back to specific routes, and returning to the root.

```Swift
@EnvironmentObject var navigator: FlowPathNavigator

var body: some View {
  VStack {
    Button("View detail") {
      navigator.push(.detail)
    }
    Button("Go back to profile") {
      navigator.goBackTo(.profile)
    }
    Button("Go back to root") {
      navigator.goBackToRoot()
    }
  }
}
```

```Swift
@EnvironmentObject var navigator: FlowNavigator<ScreenType>

var body: some View {
  VStack {
    Button("View detail") {
      navigator.push(.detail)
    }
    Button("Go back to profile") {
      navigator.goBackTo(.profile)
    }
    Button("Go back to root") {
      navigator.goBackToRoot()
    }
  }
}
```

--------------------------------

### FlowStacks Internal Mechanism

Source: https://github.com/johnpatrickmorgan/flowstacks/blob/main/README.md

The library translates the array of routes into a hierarchy of nested NavigationLinks and presentation calls, building upon the technique used in NavigationBackport.

```APIDOC
Internal Mechanism: Translates route arrays into NavigationLinks and presentation calls, expanding on NavigationBackport techniques.
```

--------------------------------

### Deep-linking with FlowStacks

Source: https://github.com/johnpatrickmorgan/flowstacks/blob/main/README.md

FlowStacks handles deep-linking by working around SwiftUI's limitation of pushing only one screen per state update. It breaks down larger updates into smaller, supported updates, with optional delays.

```APIDOC
Deep-linking: FlowStacks enables deep-linking to screens multiple layers deep by translating complex state updates into a series of smaller, supported updates.
```

--------------------------------

### Binding Screen State with FlowStacks

Source: https://github.com/johnpatrickmorgan/flowstacks/blob/main/README.md

Configures the flow destination to work with a binding to its screen state in the routes array. This allows the screen to update its state within the routes array directly. Supports typed arrays of routes using enums and Binding transformations from SwiftUINavigation.

```swift
import SwiftUINavigation

struct BindingExampleCoordinator: View {
  @State var path = FlowPath()
    
  var body: some View {
    FlowStack($path, withNavigation: true) {
      FlowLink(value: 1, style: .push, label: { Text("Push '1'") })
        .flowDestination(for: Int.self) { $number in
          EditNumberScreen(number: $number) // This screen can now change the number stored in the path.
        }
    }
  }
}

import FlowStacks
import SwiftUI
import SwiftUINavigation

enum Screen: Hashable {
  case number(Int)
  case greeting(String)
}

struct BindingExampleCoordinator: View {
  @State var routes: Routes<Screen> = []

  var body: some View {
    FlowStack($routes, withNavigation: true) {
      HomeView()
        .flowDestination(for: Screen.self) { $screen in
          if let number = Binding(unwrapping: $screen, case: /Screen.number) {
            // Here `number` is a `Binding<Int>`, so `EditNumberScreen` can change its
            // value in the routes array.
            EditNumberScreen(number: number)
          } else if case let .greeting(greetingText) = screen {
            // Here `greetingText` is a plain `String`, as a binding is not needed.
            Text(greetingText)
          }
        }
    }
  }
}

struct HomeView: View {
  @EnvironmentObject var navigator: FlowPathNavigator

  var body: some View {
    VStack {
      FlowLink(value: Screen.number(42), style: .push, label: { Text("Show Number") })
      FlowLink(value: Screen.greeting("Hello world"), style: .push, label: { Text("Show Greeting") })
    }
  }
}

struct EditNumberScreen: View {
  @Binding var number: Int

  var body: some View {
    Stepper(
      label: { Text("\(number)") },
      onIncrement: { number += 1 },
      onDecrement: { number -= 1 }
    )
  }
}
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.