IOS UISearchBar

import UIKit

class ViewController: UIViewController,UISearchBarDelegate,
UITableViewDataSource,UITableViewDelegate {

// 引用通过storyboard创建的控件
@IBOutlet var searchBar : UISearchBar!
@IBOutlet var tableView : UITableView!

// 所有组件
var ctrls:[String] = ["Label","Button1","Button2","Switch"]
// 搜索匹配的结果，Table View使用这个数组作为datasource
var ctrlsel:[String] = []

override func viewDidLoad() {
super.viewDidLoad()

// 起始加载全部内容
self.ctrlsel = self.ctrls
// 注册TableViewCell
self.tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "SwiftCell")
}

// 返回表格行数（也就是返回控件数）
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.ctrlsel.count
}

// 创建各单元显示内容(创建参数indexPath指定的单元）
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath)
-> UITableViewCell
{
// 为了提供表格显示性能，已创建完成的单元需重复使用
let identify:String = "SwiftCell"
// 同一形式的单元格重复使用，在声明时已注册
let cell = tableView.dequeueReusableCellWithIdentifier(identify, forIndexPath: indexPath)
as UITableViewCell
cell.accessoryType = UITableViewCellAccessoryType.DisclosureIndicator
cell.textLabel?.text = self.ctrlsel[indexPath.row]
return cell
}

// 搜索代理UISearchBarDelegate方法，每次改变搜索内容时都会调用
func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
// 没有搜索内容时显示全部组件
if searchText == "" {
self.ctrlsel = self.ctrls
}
else { // 匹配用户输入内容的前缀
self.ctrlsel = []
for ctrl in self.ctrls {
if ctrl.lowercaseString.hasPrefix(searchText) {
self.ctrlsel.append(ctrl)
}
}
}
// 刷新Table View显示
self.tableView.reloadData()
}

// 搜索代理UISearchBarDelegate方法，点击虚拟键盘上的Search按钮时触发
//func searchBarSearchButtonClicked(searchBar: UISearchBar!) {
//searchBar.resignFirstResponder()
//}

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

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="9059" systemVersion="14F27" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" initialViewController="BYZ-38-t0r">
<dependencies>
<deployment identifier="iOS"/>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="9049"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="tne-QT-ifu">
<objects>
<viewController id="BYZ-38-t0r" customClass="ViewController" customModule="UISearchBar" customModuleProvider="target" sceneMemberID="viewController">
<view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
<rect key="frame" x="0.0" y="0.0" width="320" height="568"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<tableView clipsSubviews="YES" contentMode="scaleToFill" alwaysBounceVertical="YES" dataMode="prototypes" style="plain" separatorStyle="default" rowHeight="44" sectionHeaderHeight="22" sectionFooterHeight="22" id="eUR-Ky-A8I">
<rect key="frame" x="6" y="32" width="320" height="440"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
<color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
<searchBar key="tableHeaderView" contentMode="redraw" id="8pv-hH-OQ9">
<rect key="frame" x="0.0" y="0.0" width="320" height="44"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
<textInputTraits key="textInputTraits"/>
<connections>
<outlet property="delegate" destination="BYZ-38-t0r" id="0l9-UU-iHJ"/>
</connections>
</searchBar>
<connections>
<outlet property="dataSource" destination="BYZ-38-t0r" id="o1t-B2-xHp"/>
<outlet property="delegate" destination="BYZ-38-t0r" id="p1t-kn-J9Q"/>
</connections>
</tableView>
</subviews>
<color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
</view>
<connections>
<outlet property="searchBar" destination="8pv-hH-OQ9" id="B0M-ya-PE5"/>
<outlet property="tableView" destination="eUR-Ky-A8I" id="YCI-P6-0gY"/>
</connections>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="130.66666666666666" y="220.09999999999999"/>
</scene>
</scenes>
</document>