ios - Swift - 删除带有动态标识符的通知

Question

我已获得用户设置通知的输入。它工作正常并且在输入日期被触发，但由于用户能够从 TableView 中删除特定通知，我需要添加一个函数来删除具有特定标识符的通知。

我的方法是设置一个随每次输入而变化的动态标识符。它有点工作，但它混淆了要删除的通知 - 我认为这是因为在每次添加通知之后，都会对数组进行排序。任何人都可以找到一种方法来实现这一点，或者有更好的方法吗？

我的方法:

func setAlert() {
        let content = UNMutableNotificationContent()
        content.title = notifTitle.text!
        content.body = notifDescribtion.text!
        content.badge = 1

        let date = datePicker.date

        let triggerDate = Calendar.current.dateComponents([.year, .month, .day, .hour, .minute], from: date)
        let trigger = UNCalendarNotificationTrigger(dateMatching: triggerDate, repeats: false)

        let request = UNNotificationRequest(identifier: String(notStructArray.count), content: content, trigger: trigger)
        UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
    }

func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
        if (editingStyle == .delete) {
            notStructArray.remove(at: indexPath.item)

            defaults.set(try? PropertyListEncoder().encode(notStructArray), forKey: "notStructArray")
            UNUserNotificationCenter.current().removePendingNotificationRequests(withIdentifiers: [String(indexPath.item)])

            tableView.deleteRows(at: [indexPath], with: .automatic)
        }
    }

Answer 1

我想我找到了解决这个问题的方法。我只是将 id 添加到结构中。每添加一个通知，这个 id 就会增加一个。 The notifications identifier is this id and when a notification is selected to be deleted, the id is being fetched and the notification removed.

func createStructArray() {
        notId += 1
        defaults.set(notId, forKey: "notId")
        let notificationData: not = not(title: notifTitle.text!, desc: notifDescribtion.text!, date: datePicker.date, type: notificationType, id: notId)
        notStructArray.append(notificationData)
        notStructArray.sort(by: { $0.date < $1.date })
    }

func setAlert() {
        let content = UNMutableNotificationContent()
        content.title = notifTitle.text!
        content.body = notifDescribtion.text!
        content.badge = 1

        let date = datePicker.date

        let triggerDate = Calendar.current.dateComponents([.year, .month, .day, .hour, .minute], from: date)
        let trigger = UNCalendarNotificationTrigger(dateMatching: triggerDate, repeats: false)

        let request = UNNotificationRequest(identifier: String(notId), content: content, trigger: trigger)
        UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
    }

func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
        if (editingStyle == .delete) {
            let array = notStructArray[indexPath.item]
            let id = array.id
            notStructArray.remove(at: indexPath.item)

            defaults.set(try? PropertyListEncoder().encode(notStructArray), forKey: "notStructArray")

            UNUserNotificationCenter.current().removePendingNotificationRequests(withIdentifiers: [String(id)])

            tableView.deleteRows(at: [indexPath], with: .automatic)
        }
    }