使用领域数据库 swift 中的日期设置 UserNotification

Question

我正在尝试根据用户为我正在处理的应用程序指定的日期和时间创建通知。我能够保存用户的日期并检索。我现在希望在用户指定的日期到达时弹出通知，就像提醒一样。我可以使用硬编码值创建通知，但现在从 Real 数据库中检索以传递到触发器值是我无法做到的。我的代码在下面指定

func notifcation() -> Void {

        let calendar = Calendar.current
        let components = DateComponents(year: 2018, month: 09, day: 08, hour: 18, minute: 55) // Set the date here when you want Notification
        let date = calendar.date(from: components)
        let comp2 = calendar.dateComponents([.year,.month,.day,.hour,.minute], from: date!)
        let trigger = UNCalendarNotificationTrigger(dateMatching: comp2, repeats: true)
        let content = UNMutableNotificationContent()
        content.title = "Don't forget"
        content.body = "Buy some milk"
        content.sound = UNNotificationSound.default()
        let identifier = "UYLLocalNotification"
        let request = UNNotificationRequest(identifier: identifier,
                                            content: content, trigger: trigger)

        center.add(request, withCompletionHandler: { (error) in
            if let error = error {
                // Something went wrong
                print(error as Any)
            }
        })
    }

然后我在 viewDidLoad 中调用 notification()

型号

class ListModel: Object {
    @objc dynamic var createdDate: Date?
    @objc dynamic var remiderDate: Date?
}

基于 Sh 的回答 我的功能

func getDataFromDB() -> Results<ListModel>? {
        let todoListArray: Results<ListModel> = database.objects(ListModel.self)
        return todoListArray
    }

我的 viewdidLoad 现在是

TodoListFunctions.instance.getDataFromDB()?.forEach({ (list) in

            notifcation(list.remiderDate)
        })

在我的 AppDelegate 中获取权限

let center = UNUserNotificationCenter.current()
        let options: UNAuthorizationOptions = [.alert, .sound]

        center.requestAuthorization(options: options) {
            (granted, error) in
            if !granted {
                print("Something went wrong")
            }
        }

可根据要求提供更多代码

Answer 1

你可以试试

let allList = self.database.objects(ListModel.self)
allList.forEach{ notifcation($0.remiderDate) }

//

func notifcation(_ reminder:Date?) -> Void { 

        guard let date = reminder else { return }
        let comp2 = calendar.dateComponents([.year,.month,.day,.hour,.minute], from: date)
        let trigger = UNCalendarNotificationTrigger(dateMatching: comp2, repeats: true)
        let content = UNMutableNotificationContent()
        content.title = "Don't forget"
        content.body = "Buy some milk"
        content.sound = UNNotificationSound.default()
        let identifier = "\(date)"  // identider should be different for each one 
        let request = UNNotificationRequest(identifier: identifier,
                                            content: content, trigger: trigger)

        center.add(request, withCompletionHandler: { (error) in
            if let error = error {
                // Something went wrong
                print(error as Any)
            }
        })
    }

//

在 AppDelegte 中设置委托

UNUserNotificationCenter.current().delegate = self

并注意来自

的打印

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

func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
  print("notification received")
}