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  • Swift

    1,搜索条Options属性还可设置如下功能样式:
    Shows Search Results Button:勾选后,搜索框右边显示一个圆形向下的按钮,单击会发送特殊事件。
    Shows Bookmarks Button:勾选后,搜索框右边会显示一个书本的按钮,单击会发送特殊事件。
    Shows Cancel Button:勾选后,搜索框右边会出现一个“Cancel”按钮,单击会发送特殊事件。
    Shows Scope Bar:勾选后,会在搜索条下面出现一个分段控制器。

    2,下面是一个搜索条的使用样例,功能如下:
    (1)在Main.storyboard界面里拖入一个Search Bar和一个Table View,Search Bar放到Table View的页眉位置
    (2)初始化或者搜索条为空时,表格显示所有数据
    (3)搜索条不为空时,表格实时过滤显示匹配的项目

    3,效果图
         

    4,代码如下
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    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.
        }
    }

    --- 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_012" 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>
                                <tableView clipsSubviews="YES" contentMode="scaleToFill" fixedFrame="YES" alwaysBounceVertical="YES" dataMode="prototypes" style="plain" separatorStyle="default" rowHeight="44" sectionHeaderHeight="22" sectionFooterHeight="22" translatesAutoresizingMaskIntoConstraints="NO" id="eUR-Ky-A8I">
                                    <rect key="frame" x="6" y="32" width="320" height="440"/>
                                    <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
                                    <searchBar key="tableHeaderView" contentMode="redraw" id="8pv-hH-OQ9">
                                        <rect key="frame" x="80" y="218" 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>
            </scene>
        </scenes>
    </document>

    上一篇Swift - 将表格UITableView滚动条移动到底部

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  • 原文地址:https://www.cnblogs.com/Free-Thinker/p/4838282.html
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