How to share Realm (using swift) in extensions and AppDelegates - swift

Question

I am having some problems with RealmSwift with the Notification Service Extension. I hope everyone can help me or give me some advice. I sincerely thank you all! And my English is not good, let me know if there is something unclear.
First, I used FCM to push the message to my ios device, I need to save my push notification to the ios device (using Realm).
There are only two cases that have a way to save successfully.
1.app running
2.app is killed/background, and click to push banner notifications I hope I can do the app off/background and save it without having to click on the banner notification.
So I used the following method
1.Add Notification Service Extension in the project
2.Enable Background fetch/Remote notifications
3.Project and Notification Service Extension added to app groups
I know that Extension can't share data, so I changed the default path of Realm.
I added the following code to AppDelegates.swift and added the same code in NotificationService.swift.
like this
let sharedDirectory: URL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.myapp")! as URL
let sharedRealmURL = sharedDirectory.appendingPathComponent("db.realm")
Realm.Configuration.defaultConfiguration = Realm.Configuration(fileURL: sharedRealmURL)
After I added these codes, when the app is killed or the background, the push message can be successfully saved to Realm, but not every time, 10 push notifications will only store 5, and most Importantly, the functionality that could have been stored in the app runing or clicking on the banner notification failed.
(But it is stored, because if I cancel the code that changes the default path of Realm, the data that has not been saved will be displayed again)
My Realm class
import Foundation
import RealmSwift
class Order: Object {
#objc dynamic var id = UUID().uuidString
#objc dynamic var name = ""
#objc dynamic var amount = ""
#objc dynamic var createDate = Date()
override static func primaryKey() -> String? {
return "id"
}
}
import UIKit
import RealmSwift
class RealmDao: NSObject {
static let shared = RealmDao()
private var realm: Realm!
private override init() {
self.realm = try! Realm()
}
func getRealmObject() -> Realm {
return self.realm
}
}
Part of my AppDelegate.swift
let realm = try! Realm()
let order: Order = Order()
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
////share Realm
let sharedDirectory: URL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.myapp")! as URL
let sharedRealmURL = sharedDirectory.appendingPathComponent("db.realm")
Realm.Configuration.defaultConfiguration = Realm.Configuration(fileURL: sharedRealmURL)
tainerURL(forSecurityApplicationGroupIdentifier: "group.myapp")
FirebaseApp.configure()
if #available(iOS 10.0, *) {
UNUserNotificationCenter.current().delegate = self
Messaging.messaging().delegate = self // For iOS 10 data message (sent via FCM)
UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge], completionHandler: { granted, error in
if granted {
print("ok...")
} else {
print("no...")
}
})
} else {
let settings: UIUserNotificationSettings =
UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
application.registerUserNotificationSettings(settings)
}
application.registerForRemoteNotifications()
return true
}
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
let sharedDirectory: URL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.myapp")! as URL
let sharedRealmURL = sharedDirectory.appendingPathComponent("db.realm")
Realm.Configuration.defaultConfiguration = Realm.Configuration(fileURL: sharedRealmURL)
let userInfo = notification.request.content.userInfo
print("userInfo: \(userInfo)")
guard
let aps = userInfo[AnyHashable("aps")] as? NSDictionary,
let alert = aps["alert"] as? NSDictionary,
let body = alert["body"] as? String,
let title = alert["title"] as? String
else {
// handle any error here
return
}
print("Title: \(title) \nBody:\(body)")
order.name = title
order.amount = body
try! realm.write {
realm.add(order)
}
completionHandler([.badge, .sound, .alert])
}
All my NotificationService.swift
import UserNotifications
import Firebase
import UIKit
import RealmSwift
import Realm
class NotificationService: UNNotificationServiceExtension {
let realm = try! Realm()
let order: Order = Order()
var contentHandler: ((UNNotificationContent) -> Void)?
var bestAttemptContent: UNMutableNotificationContent?
override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: #escaping (UNNotificationContent) -> Void) {
let sharedDirectory: URL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.myapp")! as URL
let sharedRealmURL = sharedDirectory.appendingPathComponent("db.realm")
Realm.Configuration.defaultConfiguration = Realm.Configuration(fileURL: sharedRealmURL)
self.contentHandler = contentHandler
bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)
let message = request.content.userInfo
print("userInfo: \(message)")
guard
let aps = message[AnyHashable("aps")] as? NSDictionary,
let alert = aps["alert"] as? NSDictionary,
let title = alert["body"] as? String,
let body = alert["title"] as? String
else {
// handle any error here
return
}
print("Title: \(title) \nBody:\(body)")
order.name = title
order.amount = body
try! realm.write {
realm.add(order)
}
if let bestAttemptContent = bestAttemptContent {
// Modify the notification content here...
bestAttemptContent.body = "\(bestAttemptContent.body) [fortest]"
contentHandler(bestAttemptContent)
}
}
override func serviceExtensionTimeWillExpire() {
if let contentHandler = contentHandler, let bestAttemptContent = bestAttemptContent {
contentHandler(bestAttemptContent)
}
}
}
I think my problem seems to be a problem with the default path change, because when I change the path, the push notification in the execution is saved, but the code that must delete the change path will be displayed! Is it what I missed that causes the original path to still exist (so the push notification in the app running will be stored in another data table?)