Question

我有一个输入供用户设置通知。它工作正常，并且在输入日期被触发，但是由于用户能够从表视图中删除特定的通知，因此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动态标识符，该标识符随每个输入而变化。可以，但是混合了要删除的通知-我认为这是因为在每个添加的通知之后，都会对数组进行排序。谁能找到一种可行的方法，还是有更好的方法？

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

我想我想出了一种解决方法。我仅将id添加到该结构中。每增加一个通知，此id就会增加1。通知标识符为id，当选择删除通知时，将获取id，并删除通知。

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)
        }
    }

Swift-删除带有动态标识符的通知

1 个答案: