swift - updateSearchResultsForSearchController实现

Question

我正在尝试添加搜索到我的tableview，我找不到如何过滤搜索结果。我正在从API解析JSON。

class AuthorTableView: UITableViewController, UITableViewDataSource, UITableViewDelegate, UISearchResultsUpdating, UISearchControllerDelegate {

    @IBOutlet weak var searchBar: UISearchBar!
    var authorList: [JSON]? = [] //Data from remote API
    //search
    var searchController: UISearchController?
    var searchResultsController: UITableViewController?
    var filteredList: [JSON]? = []

    override func viewDidLoad() {
    super.viewDidLoad()
    self.searchBarObj.delegate = self
    searchController = UISearchController(searchResultsController: nil)
    searchController.searchResultsUpdater = self
    searchController.dimsBackgroundDuringPresentation = false
    searchController.searchBar.sizeToFit()
    tableView.tableHeaderView = searchController.searchBar
    searchController.hidesNavigationBarDuringPresentation = false
    definesPresentationContext = true

    loadAuthorList()
    }

    override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)         
    self.hideSearchBar()
    }   

    func hideSearchBar() {
    let yOffset = self.navigationController!.navigationBar.bounds.height + UIApplication.sharedApplication().statusBarFrame.height
    self.tableView.contentOffset = CGPointMake(0, self.searchController!.searchBar.bounds.height - yOffset)
    }        

    func didDismissSearchController(searchController: UISearchController) {
    UIView.animateKeyframesWithDuration(0.5, delay: 0, options: UIViewKeyframeAnimationOptions.BeginFromCurrentState, animations: { () -> Void in
    self.hideSearchBar()
    }, completion: nil)
    }

我应该如何实施搜索过滤器？

func updateSearchResultsForSearchController(searchController: UISearchController) { 
...
}