App lifecycle handling in SwiftUI

App.swift

import SwiftUI

@main
struct Swift2TestApp: App {
  @Environment(\.scenePhase) private var scenePhase

  var body: some Scene {
    WindowGroup {
      ContentView()
    }.onChange(of: scenePhase, perform: { scenePhase in
      switch scenePhase {
      case .background:
        print("Background")

      case .inactive:
        print("Inavtive")

      case .active:
        print("Active")

      @unknown default:
        print("Unknown")
      }
    })
  }
}