[SwiftUI] View 백그라운드/포그라운드 이벤트 체크

swiftui 프로젝트 생성시 아래 4개의 이벤트를 사용하고 싶은데 어떻게 설정하는지 몰라 찾아 봤음.

willResignActiveNotification

willEnterForegroundNotification

didBecomeActiveNotification

didEnterBackgroundNotification

 

@main
struct SwiftUIComponemtApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
            // MARK: 백그라운드/포그라운드
                .onReceive(NotificationCenter.default.publisher(for: UIApplication.willResignActiveNotification)) { _ in
                    log(direction: .ETC, ofType: self, datas: "willResignActiveNotification")
                }
                .onReceive(NotificationCenter.default.publisher(for: UIApplication.willEnterForegroundNotification)) { _ in
                    log(direction: .ETC, ofType: self, datas: "willEnterForegroundNotification")
                }
                .onReceive(NotificationCenter.default.publisher(for: UIApplication.didBecomeActiveNotification)) { _ in
                    log(direction: .ETC, ofType: self, datas: "didBecomeActiveNotification")
                }
                .onReceive(NotificationCenter.default.publisher(for: UIApplication.didEnterBackgroundNotification)) { _ in
                    log(direction: .ETC, ofType: self, datas: "didEnterBackgroundNotification")
                }
        }
    }
}

 

또는

struct ContentView: View {
    @Environment(\.scenePhase) private var scenePhase
    
    var body: some View {
        Text("Live Main View!!!")
            .onChange(of: scenePhase) { newPhase in
                switch newPhase {
                case .background:
                    print("SchenePhase: Background from \(newPhase)")
                case .inactive:
                    print("SchenePhase: Inactive from \(newPhase)")
                case .active:
                    print("SchenePhase: Active/Foreground from \(newPhase)")
                @unknown default:
                    print("SchenePhase: Unknown scene phase \(newPhase)")
                }
            }
    }
}

 

 

두가지 방법중에 먼저 호출되는건 첫번째 방법이고 더 익숙한 방법임.