UNLocationNotificationTrigger 未在 SwiftUI 中通知用户

如何解决UNLocationNotificationTrigger 未在 SwiftUI 中通知用户

我正在创建一个程序，当用户进入指定位置时通知他们。该代码对我来说看起来正确，但我无法让它实际显示通知。当我将触发器更改为 UNTimeIntervalNotificationTrigger 时它确实有效，但这只会根据指定的时间限制而不是位置通知用户。下面是我的代码，我希望有人可以为我提供指导或指向其他可以解释为什么会出现此问题的资源。

我对 iOS 编程很陌生，所以非常感谢！ :)

import SwiftUI
import UserNotifications
import CoreLocation
struct ContentView: View {
    
    private let locationManager = CLLocationManager()
    
    var body: some View {
        vstack {
            Button(action: {
                       self.locationManager.requestAlwaysAuthorization()
                      
                   }) {
                       Text("Request authorization")
                   }
            Button("Request Permission") {
                UNUserNotificationCenter.current().requestAuthorization(options: [.alert,.badge,.sound]) { success,error in
                    if success {
                        print("All set!")
                    } else if let error = error {
                        print(error.localizedDescription)
                    }
                }
            }

            Button("Notify when arrived at location") {
               
                let content = UNMutableNotificationContent()
                content.title = "Feed the cat"
                content.subtitle = "It looks hungry"
                content.sound = UNNotificationSound.default
                
               //sets geofence
                let center = CLLocationCoordinate2D(latitude: 37.7861353,longitude: -122.4532538)
                
                let region = CLCircularRegion(center: center,radius: 2000.0,identifier: "Headquarters")
                region.notifyOnEntry = true //notify user when they enter
                region.notifyOnExit = false //do not notify when they exit
                
                //when user enters,trigger notification
                let trigger = UNLocationNotificationTrigger(region: region,repeats: false)

               //  choose a random identifier
                let request = UNNotificationRequest(identifier: UUID().uuidString,content: content,trigger: trigger)
                
               print("waiting to enter location")

                // add our notification request
                UNUserNotificationCenter.current().add(request)

            }
        }
    }
}