在我的AppDelegate中，我添加了一个方法来在我的 上执行获取请求Core Data，在某些情况下，我正在显示一个通知......但我看到有一些不推荐使用的方法。我试图做一些改变，但是：
当我杀死我的应用程序时，后台模式不起作用
当我的应用程序在前台时，后台模式有效，但通知不显示
当我在后台运行我的应用程序时，一切正常
这是我的代码：
我想每次（每分钟）运行的方法：
func notification(){
let appDel: AppDelegate = UIApplication.shared.delegate as! AppDelegate
let context: NSManagedObjectContext = appDel.managedObjectContext
var messageNotif:String? = nil
do {
let request = NSFetchRequest<NSFetchRequestResult>(entityName: "Leads")
let predicate = NSPredicate(format: "statutSendLead=%@ OR statutSendSimulation=%@", "0", "0")
request.predicate = predicate
let results = try context.fetch(request)
if results.count > 0 {
if Reachability.isConnectedToNetwork() == false {
messageNotif = "Votre demande n'a pas été envoyée, merci de vous connecter à internet."
} else {
Reachability.checkUrl(urlString:Configuration.MyVariables.url, finished: { isSuccess in
if isSuccess == false {
messageNotif = "Notre service d'enregistrement des demandes est temporairement indisponible, un renvoi sera effectué ultérieurement."
}
})
}
*/
if (messageNotif != nil) {
let identifier = self.stringWithUUID()
if #available(iOS 10.0, *) {
let center = UNUserNotificationCenter.current()
center.requestAuthorization(options: [.alert, .sound]) { (granted, error) in
let content = UNMutableNotificationContent()
content.body = messageNotif!
content.sound = UNNotificationSound.default()
// Deliver the notification in five seconds.
let trigger = UNTimeIntervalNotificationTrigger.init(timeInterval: 5, repeats: false)
let request = UNNotificationRequest.init(identifier: "test", content: content, trigger: trigger)
// Schedule the notification.
let center = UNUserNotificationCenter.current()
UNUserNotificationCenter.current().removeAllPendingNotificationRequests()
UNUserNotificationCenter.current().add(request) {(error) in
if let error = error {
print(error)
}
}
}
} else {
let notification = UILocalNotification()
notification.alertBody = messageNotif
notification.fireDate = NSDate() as Date
notification.soundName = UILocalNotificationDefaultSoundName
UIApplication.shared.scheduleLocalNotification(notification)
}
}
}
/* else {
timerNotification.invalidate()
} */
} catch {
print(error)
}
}
其他方法：
var window: UIWindow?
var timerUploadData:Timer!
var timerNotification:Timer!
var test:Timer!
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
UIApplication.shared.setMinimumBackgroundFetchInterval(
UIApplicationBackgroundFetchIntervalMinimum)
let userDefaults = UserDefaults.standard
if userDefaults.object(forKey: "ApplicationUniqueIdentifier") == nil {
let UUID = Foundation.UUID().uuidString
userDefaults.set(UUID, forKey: "ApplicationUniqueIdentifier")
userDefaults.synchronize()
}
Thread.sleep(forTimeInterval: 3.0)
window = UIWindow(frame: UIScreen.main.bounds)
let containerViewController = ContainerViewController()
window!.rootViewController = containerViewController
window!.makeKeyAndVisible()
if #available(iOS 10.0, *){
application.registerUserNotificationSettings(UIUserNotificationSettings(types: [.badge, .sound, .alert], categories: nil))
timerNotification = Timer.scheduledTimer(timeInterval: 60 * 1, target: self, selector: #selector(AppDelegate.notification), userInfo: nil, repeats: true)
}
else { //If user is not on iOS 10 use the old methods we've been using
let notificationSettings = UIUserNotificationSettings(
types: [UIUserNotificationType.badge, UIUserNotificationType.alert, UIUserNotificationType.sound], categories: nil)
timerNotification = Timer.scheduledTimer(timeInterval: 60 * 1, target: self, selector: "notification", userInfo: nil, repeats: true)
application.registerUserNotificationSettings(notificationSettings)
}
registerPushNotifications()
return true
}
func application(_ application: UIApplication, performFetchWithCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
notification()
}
func application(_ application: UIApplication, didRegister notificationSettings: UIUserNotificationSettings) {
if notificationSettings.types != UIUserNotificationType() {
application.registerForRemoteNotifications()
}
}
func registerPushNotifications() {
DispatchQueue.main.async {
let settings = UIUserNotificationSettings(types: [.badge, .sound, .alert], categories: nil)
UIApplication.shared.registerUserNotificationSettings(settings)
}
}
func stringWithUUID() -> String {
let uuidObj = CFUUIDCreate(nil)
let uuidString = CFUUIDCreateString(nil, uuidObj)!
return uuidString as String
}