Reorder Realm List in UITableView

ReorderingRealmListInTableView.swift

import UIKit
import RealmSwift

class Data: Object {
    dynamic var name = ""
    ...
}

class DataWrapper: Object {
    let list = List<Data>()
}

class ViewController: UITableViewController {
    lazy var realm = try! Realm()
    var objects: List<Data>!

    override func viewDidLoad() {
        super.viewDidLoad()
        ...
        objects = realm.objects(DataWrapper.self).first?.list
    }

    // MARK: - Table View

    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return objects.count
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath)

        let object = objects[indexPath.row]
        cell.textLabel!.text = object.num.description

        return cell
    }

    override func tableView(tableView: UITableView, moveRowAtIndexPath sourceIndexPath: NSIndexPath, toIndexPath destinationIndexPath: NSIndexPath) {
        try! realm.write {
            let sourceObject = objects[sourceIndexPath.row]
            objects.removeAtIndex(sourceIndexPath.row)
            objects.insert(sourceObject, atIndex: destinationIndexPath.row)
        }
    }

    override func tableView(tableView: UITableView, shouldIndentWhileEditingRowAtIndexPath indexPath: NSIndexPath) -> Bool {
        return false
    }

    override func tableView(tableView: UITableView, canMoveRowAtIndexPath indexPath: NSIndexPath) -> Bool {
        return true
    }

    override func tableView(tableView: UITableView, editingStyleForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCellEditingStyle {
        return .None
    }
}