I want to tap a push notification to open a specific screen in SwiftUI

Question

I am using SwiftUI.

I want to open a specific screen other than Root View by clicking the push notification. There are several ways to open it using StoryBoard, but not without StoryBoard.

How can I achieve it without using StoryBoard?

I tried this, but I'm a beginner, so I don't know.

class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {
    var window: UIWindow?

    func userNotificationCenter(
        _ center: UNUserNotificationCenter,
        willPresent notification: UNNotification,
        withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions)
        -> Void) {
        completionHandler([.alert, .badge, .sound])
    }

    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: () -> Void) {
        // I want to open a screen other than Root View here.
        completionHandler()
    }
    ... }

Answer 1

The idea is you set a variable when the user is coming from a notification and check that variable when you want to present the UI.

here is a sample:

// assume that AppDelegate is also our UNNotificationCenterDelegate 
// I'm using a bool variable to check if user is coming from the notification
var isFromNotif: Bool = false
extension AppDelegate: UNUserNotificationCenterDelegate {
    
    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
        
        isFromNotif = true
        // ...
    
}

now in my View, I check the flag.

struct ContentView1: View {
    
    var body: some View {
        return Group {
            if isFromNotif {
                Text("coming from notification")
            } else {
                Text("not coming from notification")
            }
        }
    }
    
}

I hope this sample could help you.