Элемент Realm появляется дважды при добавлении в представление таблицы - PullRequest
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Элемент Realm появляется дважды при добавлении в представление таблицы

0 голосов
/ 09 февраля 2019

Я занимаюсь разработкой приложения, в котором вы можете добавлять элементы в табличное представление с помощью базы данных Realm.На данный момент я могу добавить элемент в представление таблицы, но он добавляется дважды в базу данных области.Это означает, что если я закрою свое приложение и вернусь в него, новый элемент, который я ранее добавил, появится дважды, один раз в новой позиции и один раз заменив элемент, который был в табличном представлении чуть выше него.Прикреплен мой код.Я пробовал разные вещи, но просто не могу понять, как это исправить.Спасибо за вашу помощь!

Это код, в который я добавляю элемент в свою таблицу / базу данных области: 

extension MainTableViewController {

func createNewEventAlertView () {

    let newEventAlert = PMAlertController(title: "New Event Alert", description: "", image: nil, style: .alert)
    newEventAlert.addTextField { (eventNameAlertTextField) in
        eventNameAlertTextField?.placeholder = "Event Name"
        eventNameAlertTextField?.adjustsFontSizeToFitWidth = true
        eventNameAlertTextField?.textAlignment = .center
        eventNameAlertTextField?.text! = nameOfEvent.text!
        nameOfEvent = eventNameAlertTextField!
    }
    newEventAlert.addTextField { (dayEventDateTextField) in
        dayEventDateTextField?.placeholder = "Day Of The Month"
        dayEventDateTextField?.inputView = dayPickerView
        dayOfEvent = dayEventDateTextField!
    }
    newEventAlert.addTextField { (monthEventDateTextField) in
        monthEventDateTextField?.placeholder = "Month"
        monthEventDateTextField?.inputView = monthPickerView
        monthOfEvent = monthEventDateTextField!
    }
    newEventAlert.addTextField { (remindOneDayBeforeTextField) in
        remindOneDayBeforeTextField?.placeholder = "Remind 1 Day Before?"
        remindOneDayBeforeTextField?.inputView = oneDayPickerView
        oneDayReminder = remindOneDayBeforeTextField!
    }
    newEventAlert.addTextField { (remindSevenDaysBeforeTextField) in
        remindSevenDaysBeforeTextField?.placeholder = "Remind 7 Days Before?"
        remindSevenDaysBeforeTextField?.inputView = sevenDayPickerView
        sevenDayReminder = remindSevenDaysBeforeTextField!
    }


    newEventAlert.addAction(PMAlertAction(title: "Add", style: .default, action: {
        print("Add Event Button Pressed in Alert")

        //Adding realmEventItem & its variables to the Database
        try! realm.write {
            //Adding the name & date of the Event to the Realm Database Item
            self.realmEventItem.nameOfEventRealm = self.nameOfEvent.text!
            let fullDateOfEvent = self.dayOfEvent.text! + " " + self.monthOfEvent.text!
            self.realmEventItem.dateOfEventRealm = fullDateOfEvent

            //Telling the Realm Database whether they wan't to be reminded one & seven days before the event
            if self.oneDayReminder.text == "Yes" {
                self.realmEventItem.oneDayBeforeReminderRealm = true
            } else {self.realmEventItem.oneDayBeforeReminderRealm = false}

            if self.sevenDayReminder.text == "Yes" {
                self.realmEventItem.sevenDaysBeforeReminderRealm = true
            } else {self.realmEventItem.sevenDaysBeforeReminderRealm = false}


            // Making Sure there is something written in the Name & Date Text Fields before allowing anything to be added
            if self.nameOfEvent.text != "" && self.dayOfEvent.text != "" && self.monthOfEvent.text != "" {
                    /*
                     - use create method instead of add method to add new entries,
                     - Because add method replaces last new entry with our previous entry,
                     - so every time only one object store in database
                     */


                realm.create(RealmEventItem.self, value: self.realmEventItem, update: false)
                self.tableView.insertRows(at: [IndexPath.init(row: realmEventList.count-1, section: 0)], with: .automatic)

                //By Adding the follwing line it has meant that my code no longer crashes when I add an Item, then delete it & then try and add another item again.
                self.tableView.numberOfRows(inSection: realmEventList.count)
                print(realmEventList.count)


                self.labelWhenTableViewIsEmpty.text = ""
                    print("Add to Table View Called")

            } else {
                // Missing Boxes
                print("Missing Information!")
            }


            // This makes sure that each time the user goes to add a new Event all the picker are reset
            if self.nameOfEvent.text != "" { self.nameOfEvent.text = "" }
            if self.dayPickerView.selectedRow(inComponent: 0) != 0 { self.dayPickerView.selectRow(0, inComponent: 0, animated: false) }
            if self.monthPickerView.selectedRow(inComponent: 0) != 0 {self.monthPickerView.selectRow(0, inComponent: 0, animated: false)}
            if self.oneDayPickerView.selectedRow(inComponent: 0) != 0 {self.oneDayPickerView.selectRow(0, inComponent: 0, animated: false)}
            if self.sevenDayPickerView.selectedRow(inComponent: 0) != 0 {self.sevenDayPickerView.selectRow(0, inComponent: 0, animated: false)}
        }


        print("REAL DATA:::-- \(realm.objects(RealmEventItem.self))")
    }))

    newEventAlert.addAction(PMAlertAction(title: "Cancel", style: .cancel, action: {
        print("Cancel Button Pressed in Alert")
    }))

    present(newEventAlert, animated: true, completion: nil)

}
}

1 Ответ

0 голосов
/ 09 февраля 2019

Мне удалось решить эту проблему с помощью новой переменной типа RealmEventItem () Измененный код (который находится внутри try! Realm.write) теперь выглядит следующим образом: 

 try! realm.write {

           //The concept of adding a newEventItem of type RealmEventItem() & and then adding all the values to it rather than direct to the RealmEventItem() fixed the problem of the new items replacing the previous ones.
            let newEventItem = RealmEventItem()

            // Joining the Day & Month Together
            let fullDateOfEvent = self.dayOfEvent.text! + " " + self.monthOfEvent.text!
            // Making Variables to give a boolean of whether the user would like reminders
            var oneDayReminderItem = false
            var sevenDayReminderItem = false

            if self.oneDayReminder.text == "Yes" {
                oneDayReminderItem = true
            } else {oneDayReminderItem = false}

            if self.sevenDayReminder.text == "Yes" {
                sevenDayReminderItem = true
            } else {sevenDayReminderItem = false}

            //Setting the values to the newEventItem --> which is part of the RealmEventItem()
            newEventItem.nameOfEventRealm = self.nameOfEvent.text!
            newEventItem.dateOfEventRealm = fullDateOfEvent
            newEventItem.oneDayBeforeReminderRealm = oneDayReminderItem
            newEventItem.sevenDaysBeforeReminderRealm = sevenDayReminderItem


            // Making Sure there is something written in the Name & Date Text Fields before allowing anything to be added
            if self.nameOfEvent.text != "" && self.dayOfEvent.text != "" && self.monthOfEvent.text != "" {
                    /*
                     - use create method instead of add method to add new entries,
                     - Because add method replaces last new entry with our previous entry,
                     - so every time only one object store in database
                     */
                //realm.add(newEventItem, update: false)
                realm.create(RealmEventItem.self, value: newEventItem, update: false)
                self.tableView.insertRows(at: [IndexPath.init(row: realmEventList.count-1, section: 0)], with: .automatic)

                //By Adding the following line it has meant that my code no longer crashes when I add an Item, then delete it & then try and add another item again.
                self.tableView.numberOfRows(inSection: realmEventList.count)
                print(realmEventList.count)


                self.labelWhenTableViewIsEmpty.text = ""
                    print("Add to Table View Called")

            } else {
                // Missing Boxes
                print("Missing Information!")
            }
            }

Надеюсь, что это можетпомогите кому-нибудь в будущем!

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