在SwiftUI中将Firebase数据库显示到列表中时出现问题

Question

我是SwiftUi的新手。我正在尝试从Firebase实时数据库中读取数据并显示在列表中。

但是数据加载并保存到数组中，但是当我将其集成到列表中时。列表显示错误。

这是源代码

struct NotificationView: View {
    @State private
    var notificationArray = []
    var body: some View {

        // Here is the issue in list
        List(self.notificationArray) {
            noti in
                Text(noti.title)
        }.onAppear {
            self.loadNotification()
        }
    }
}
func loadNotification() {
    //For Admin
    let rootRef = Database.database().reference().child("Admin").child("PushNotification")
    rootRef.observeSingleEvent( of: .value, with: {
        snapshot in

        for rest in snapshot.children.allObjects as![DataSnapshot] {

            guard
            let restDict = rest.value as ? [String: Any]
            else {
                continue
            }
            let title = restDict["title"] as ? String
            let description = restDict["description"] as ? String
            self.notificationArray.append(PushNotification(title: title!, descripiton: description!))
        }
    })
}
}

struct NotificationView_Previews: PreviewProvider {
    static
    var previews: some View {
        NotificationView()
    }
}
struct PushNotification: Identifiable {
    var id = UUID()
    var title: String
    var descripiton: String
}