搜索结果未在tableView中显示单元格

tableView不会显示包含搜索结果的单元格。搜索工作正常，我验证了所有数据，但是当我将cell.localName？.text分配给该值时，它始终为nil。不知道出什么问题了。我在Objective-C中发现了另一个具有相同问题的帖子，答案是我需要使用真正的tableView中的单元格，在使单元格出队时添加self.tableView，但这对我不起作用。有什么建议？

这是我的代码：

class SearchResultsController: UITableViewController, UISearchResultsUpdating {
var localNames: [String] = []
var filteredNames: [String] = []

override func viewDidLoad() {
    super.viewDidLoad()

    tableView.registerClass(localCell.self, forCellReuseIdentifier: "localCell")
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func updateSearchResultsForSearchController(searchController: UISearchController) {
    let searchedString = searchController.searchBar.text
    filteredNames.removeAll(keepCapacity: true)
    if !searchedString.isEmpty {
        let filter: String -> Bool = {name in
            let range = name.rangeOfString(searchedString, options: NSStringCompareOptions.CaseInsensitiveSearch)
            return range != nil
        }
            let matches = localNames.filter(filter)
            filteredNames += matches

    }
    tableView.reloadData()
}



// MARK: - Table view data source

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete method implementation.
    // Return the number of rows in the section.
    return filteredNames.count
}


override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell: localCell = self.tableView.dequeueReusableCellWithIdentifier("localCell") as localCell
    cell.localName?.text =  filteredNames[indexPath.row]
    println(cell.localName?.text)
    cell.localAddress?.text = "text"
    cell.scheduleData?.text = "text"
    cell.salaData?.text = "text"
    cell.wifiData?.text = "text"
    return cell
}