UiTableView reloadData不调用cellForRowAtIndex

Question

出于某种原因，当我尝试在ContainerView中嵌入的UITableViewController上重新加载数据时，它从不调用numberOfRowsForIndex或cellForRowAtIndex。

class SelectedDatesTableViewController: UITableViewController { 

    override func viewDidLoad() {
        super.viewDidLoad()

        self.preferredContentSize.height = CGFloat( SelectedDatesTimeAway.selectedDates.count * 44 )
    }

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

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = self.tableView.dequeueReusableCellWithIdentifier("dateCell")! as UITableViewCell
        let dateFormatter = NSDateFormatter()
        dateFormatter.dateStyle = .ShortStyle
        dateFormatter.timeStyle = .NoStyle

        cell.textLabel?.text! = dateFormatter.stringFromDate(SelectedDatesTimeAway.selectedDates[indexPath.row])

        return cell
    }

    func reloadTable() {
        self.preferredContentSize.height = CGFloat( SelectedDatesTimeAway.selectedDates.count * 44 )
        self.tableView.reloadData()
    }
}