无法将信息从 AppDelegate 中的本地通知传递到 SwiftUI 中的视图

Question

我有一个有效的预定通知，我正在尝试从该通知中获取信息以打开另一个视图，但现在我无法在代码的

onReceive

部分中将该信息传递到我的主视图中。

我可以在代码的

AppDelegate

部分看到信息。

我觉得我在某处遗漏了一小步。

tl;dr：尝试将通知信息从

AppDelegate

传递到

MainView

@main
struct UntitledNewsApp: App {
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
    @StateObject var notificationData = NotificationData()
    
    
    var body: some Scene {
        WindowGroup {
            MainView()
                .environmentObject(notificationData)
        }
    }
}

class AppDelegate: NSObject, UIApplicationDelegate, UNUserNotificationCenterDelegate {
    var notificationData = NotificationData()
    
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
        UNUserNotificationCenter.current().delegate = self
        return true
    }
    
    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
        // Handle the received notification and navigate to the desired view
        if response.actionIdentifier == UNNotificationDefaultActionIdentifier {
            let articleResponse = response.notification.request.content
            
            notificationData.notificationTitle = articleResponse.title
            
            DispatchQueue.main.async {
                if let appDelegate = UIApplication.shared.delegate as? AppDelegate {
                    appDelegate.notificationData.notificationTitle = articleResponse.title
                }
            }
            // Notification tapped, navigate to the desired view
            NotificationCenter.default.post(name: NSNotification.Name("NotificationTapped"), object: nil)
        }
        
        completionHandler()
    }
}

class NotificationData: ObservableObject {
    @Published var notificationTitle: String = ""
}

struct MainView: View {
  @EnvironmentObject var notificationData: NotificationData
    ...
   var body: some View {
Text("Never Give You Up")
        .onReceive(NotificationCenter.default.publisher(for: NSNotification.Name("NotificationTapped"))) { notification in
            print("onReceive in blank: \(notificationData.notificationTitle)")
        }
    }
}

Answer 1

每次调用

NotificationData()

时，您都会创建一个不同的实例，其中一个实例不知道另一个实例。

您可以更改注射方式进行连接。

.environmentObject(appDelegate.notificationData)

您不需要

@StateObject

，

AppDelegate

将管理生命周期。