Programatic example of UISearchDisplayController

ViewController.swift

//
//  ViewController.swift
//  Example
//
//  Created by Nathan Borror on 8/28/14.
//  Copyright (c) 2014 Nathan Borror. All rights reserved.
//

import UIKit

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UISearchBarDelegate, UISearchDisplayDelegate {
                            
    let kCellIdentifier = "Cell"

    var searchController: UISearchDisplayController!
    var tableView: UITableView!
    var tableData: [String]? {
        didSet {
            self.tableView.reloadData()
        }
    }
    var tableDataFiltered = [String]()

    override func viewDidLoad() {
        super.viewDidLoad()

        tableView = UITableView(frame: CGRectZero, style: .Plain)
        tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: kCellIdentifier)
        tableView.delegate = self
        tableView.dataSource = self
        self.view.addSubview(tableView)

        let searchBar = UISearchBar()
        searchBar.delegate = self
        searchBar.sizeToFit()
        tableView.tableHeaderView = searchBar

        searchController = UISearchDisplayController(searchBar: searchBar, contentsController: self)
        searchController.searchResultsDataSource = self
        searchController.searchResultsDelegate = self
        searchController.searchResultsTableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: kCellIdentifier)

        tableData = ["Foo", "Bar", "Baz"]
    }

    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        tableView.frame = self.view.bounds
    }

    // UITableViewDataSource

    func tableView(tableView: UITableView!, numberOfRowsInSection section: Int) -> Int {
        if tableView != self.tableView {
            return self.tableDataFiltered.count
        }

        if let count = tableData?.count {
            return count
        }
        return 0
    }

    func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell! {
        let cell = tableView.dequeueReusableCellWithIdentifier(kCellIdentifier)

        var data: String
        if tableView != self.tableView {
            data = tableDataFiltered[indexPath.row]
        } else {
            data = tableData![indexPath.row]
        }

        cell.textLabel.text = data
        return cell
    }

    // UITableViewDelegate

    func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!) {
        if let data = tableData?[indexPath.row] {
            let viewController = DetailViewController(data: data)
            self.navigationController.pushViewController(viewController, animated: true)
        }
    }

    // UISearchBarDelegate

    func searchBar(searchBar: UISearchBar!, textDidChange searchText: String!) {
        self.tableDataFiltered = self.tableData!.filter({ (data: String) -> Bool in
            let match = data.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch)
            return match != nil
        })
    }

}