（注：自iOS8起，苹果便废弃UISearchDisplayController的使用，改为使用UISearchController来实现类似功能，可参考我的另一篇文章“Swift - 使用UISearchController实现带搜索栏的表格”）
下面提供了一个使用样例，同时通过代码定制Search Bar的一些属性来实现自定义的外观和效果，并且展示用于选择搜索范围的分段条的用法。
效果图如下：
--- ViewController.swift ---
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import UIKitclass ViewController: UIViewController,UISearchBarDelegate { // 引用通过storyboard创建的控件 @IBOutlet var searchDisplay: UISearchDisplayController! // 所有组件 var ctrls:[String] = ["Label","Button1-初级","Button1-高级","Button2-初级","Button2-高级","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() // Do any additional setup after loading the view, typically from a nib. // 起始加载全部内容 self.ctrlsel = self.ctrls // 注册TableViewCell self.searchDisplay.searchResultsTableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "SwiftCell") // 设置文本提示 self.searchDisplay.searchBar.placeholder = "输入搜索信息" // 可以设置初始值 //self.searchDisplay.searchBar.text = "b" // 设置搜索栏提示信息 self.searchDisplay.searchBar.prompt = "搜索组件名称" // 不显示Search Bar边框 self.searchDisplay.searchBar.searchBarStyle = UISearchBarStyle.Minimal // 显示分段条 self.searchDisplay.searchBar.showsScopeBar = true self.searchDisplay.searchBar.scopeButtonTitles = ["全部","初级","高级"] } // 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 = self.searchDisplay.searchResultsTableView.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!) { self.searchText = searchText searchCtrls() } // 选择分段条时调用 func searchBar(searchBar: UISearchBar!, selectedScopeButtonIndexDidChange selectedScope: Int) { println(selectedScope) searchCtrls(); } // 保存搜索内容 var searchText:String = "" // 搜索过滤 func searchCtrls() { // 没有搜索内容时显示全部组件 if self.searchText == "" { self.ctrlsel = self.ctrls } else { var scope = self.searchDisplay.searchBar.selectedScopeButtonIndex; // 匹配用户输入内容的前缀 self.ctrlsel = [] for ctrl in self.ctrls { let lc = ctrl.lowercaseString if lc.hasPrefix(self.searchText) { if (scope == 0 || (scope == 1 && lc.hasSuffix("初级")) || (scope == 2 && lc.hasSuffix("高级"))) { self.ctrlsel.append(ctrl) } } } } // 不需要刷新Table View显示 // self.searchDisplay.searchResultsTableView.reloadData() } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. }} |
--- Main.storyboard ---
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<?xml version="1.0" encoding="UTF-8" standalone="no"?><document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="6254" systemVersion="14B25" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r"> <dependencies> <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6247"/> </dependencies> <scenes> <!--View Controller--> <scene sceneID="tne-QT-ifu"> <objects> <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="SwiftInAction_008_013" customModuleProvider="target" sceneMemberID="viewController"> <layoutGuides> <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/> <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/> </layoutGuides> <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC"> <rect key="frame" x="0.0" y="0.0" width="600" height="600"/> <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/> <subviews> <searchBar contentMode="redraw" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="514-A1-KsH"> <rect key="frame" x="0.0" y="28" width="320" height="44"/> <textInputTraits key="textInputTraits"/> <connections> <outlet property="delegate" destination="BYZ-38-t0r" id="HNb-H1-SIO"/> </connections> </searchBar> </subviews> <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/> </view> <connections> <outlet property="searchDisplay" destination="Lnz-5r-UWS" id="vbY-sQ-4L2"/> <outlet property="searchDisplayController" destination="Lnz-5r-UWS" id="Kly-uU-7J1"/> </connections> </viewController> <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/> <searchDisplayController id="Lnz-5r-UWS"> <connections> <outlet property="delegate" destination="BYZ-38-t0r" id="889-9H-eic"/> <outlet property="searchBar" destination="514-A1-KsH" id="jg7-8Q-dht"/> <outlet property="searchContentsController" destination="BYZ-38-t0r" id="S5V-Yk-ta3"/> <outlet property="searchResultsDataSource" destination="BYZ-38-t0r" id="5rb-QW-jlM"/> <outlet property="searchResultsDelegate" destination="BYZ-38-t0r" id="9rR-uv-SDW"/> </connections> </searchDisplayController> </objects> </scene> </scenes></document> |