Swift - 给表格添加编辑功能（删除，插入）

1，下面的样例是给表格UITableView添加编辑功能：

（1）给表格添加长按功能，长按后表格进入编辑状态

（2）在编辑状态下，第一个分组处于删除状态，第二个分组处于插入状态

（3）点击删除图标，删除对应条目

（4）点击添加图标，插入一条新数据

2，效果图

       

       

3，代码以下

 

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import UIKit   class ViewController : UIViewController , UITableViewDelegate , UITableViewDataSource , UIGestureRecognizerDelegate {            var tableView: UITableView ?            var allnames: Dictionary < Int , [ String ]>?            var adHeaders:[ String ]?            override func loadView() {          super .loadView()      }            override func viewDidLoad() {          super .viewDidLoad()                    //初始化数据，这一次数据，咱们放在属性列表文件里          self .allnames =  [              0:[ String ]([                  "UILabel 标签" ,                  "UIButton 按钮" ]),              1:[ String ]([                  "UIDatePiker 日期选择器" ,                  "UITableView 表格视图" ])          ];                    println ( self .allnames)                    self .adHeaders = [              "常见 UIKit 控件" ,              "高级 UIKit 控件"          ]                    //建立表视图          self .tableView = UITableView (frame: self .view.frame, style: UITableViewStyle . Grouped )          self .tableView!.delegate = self          self .tableView!.dataSource = self          //建立一个重用的单元格          self .tableView!.registerClass( UITableViewCell . self , forCellReuseIdentifier: "SwiftCell" )          self .view.addSubview( self .tableView!)                    //建立表头标签          var headerLabel = UILabel (frame: CGRectMake (0, 0, self .view.bounds.size.width, 30))          headerLabel.backgroundColor = UIColor .blackColor()          headerLabel.textColor = UIColor .whiteColor()          headerLabel.numberOfLines = 0          headerLabel.lineBreakMode = NSLineBreakMode . ByWordWrapping          headerLabel.text = "UIKit 控件"          headerLabel.font = UIFont .italicSystemFontOfSize(20)          self .tableView!.tableHeaderView = headerLabel                    //绑定对长按的响应          var longPress =  UILongPressGestureRecognizer (target: self ,              action: Selector ( "tableviewCellLongPressed:" ))          //代理          longPress.delegate = self          longPress.minimumPressDuration = 1.0          //将长按手势添加到须要实现长按操做的视图里          self .tableView!.addGestureRecognizer(longPress)      }             func tableviewCellLongPressed(gestureRecognizer: UILongPressGestureRecognizer )      {          if (gestureRecognizer.state == UIGestureRecognizerState . Began )          {              println ( "UIGestureRecognizerStateBegan" );          }          if (gestureRecognizer.state == UIGestureRecognizerState . Changed )          {              println ( "UIGestureRecognizerStateChanged" );          }                    if (gestureRecognizer.state == UIGestureRecognizerState . Ended )          {              println ( "UIGestureRecognizerStateEnded" );              //在正常状态和编辑状态之间切换              if ( self .tableView!.editing == false )              {                  self .tableView!.setEditing( true , animated: true )              }              else              {                  self .tableView!.setEditing( false , animated: true )                                }          }      }            //在本例中，有2个分区      func numberOfSectionsInTableView(tableView: UITableView !) -> Int {          return 2      }            //返回表格行数（也就是返回控件数）      func tableView(tableView: UITableView , numberOfRowsInSection section: Int ) -> Int {          var data = self .allnames?[section]          return data!.count      }            // UITableViewDataSource协议中的方法，该方法的返回值决定指定分区的头部      func tableView(tableView: UITableView , titleForHeaderInSection          section: Int )-> String      {          var headers =  self .adHeaders!;          return headers[section];      }            // UITableViewDataSource协议中的方法，该方法的返回值决定指定分区的尾部      func tableView(tableView: UITableView , titleForFooterInSection          section: Int )-> String      {          var data = self .allnames?[section]          return "有\(data!.count)个控件"      }            //建立各单元显示内容(建立参数indexPath指定的单元）      func tableView(tableView: UITableView , cellForRowAtIndexPath indexPath: NSIndexPath )          -> UITableViewCell      {          //为了提供表格显示性能，已建立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                    var secno = indexPath.section          var data = self .allnames?[secno]          cell.textLabel?.text = data![indexPath.row]                    return cell      }            // UITableViewDelegate 方法，处理列表项的选中事件      func tableView(tableView: UITableView !, didSelectRowAtIndexPath indexPath: NSIndexPath !)      {          self .tableView!.deselectRowAtIndexPath(indexPath, animated: true )                    var itemString = self .allnames![indexPath.section]![indexPath.row]                    var alertview = UIAlertView ();          alertview.title = "提示!"          alertview.message = "你选中了【\(itemString)】" ;          alertview.addButtonWithTitle( "肯定" )          alertview.show();      }            func tableView(tableView: UITableView !, editingStyleForRowAtIndexPath indexPath: NSIndexPath !)          -> UITableViewCellEditingStyle      {          if (indexPath.section == 1)          {              return UITableViewCellEditingStyle . Insert          }          return UITableViewCellEditingStyle . Delete      }            func tableView(tableView: UITableView !,          titleForDeleteConfirmationButtonForRowAtIndexPath indexPath: NSIndexPath !) -> String !      {          var data = self .allnames?[indexPath.section]!                    var itemString = data![indexPath.row] as String          return "肯定删除\(itemString)？"      }            func tableView(tableView: UITableView !, commitEditingStyle editingStyle: UITableViewCellEditingStyle ,          forRowAtIndexPath indexPath: NSIndexPath !)      {          if (editingStyle == UITableViewCellEditingStyle . Delete )          {              self .allnames?[indexPath.section]?.removeAtIndex(indexPath.row)                            self .tableView!.reloadData()              self .tableView!.setEditing( true , animated: true )              println ( "你确认了删除按钮" )             // Array          }          else if (editingStyle == UITableViewCellEditingStyle . Insert )          {              self .allnames?[indexPath.section]?.insert( "插入一项新的" , atIndex: indexPath.row+1)              println ( "你按下了插入按钮" )              self .tableView!.reloadData()          }      }            override func didReceiveMemoryWarning() {          super .didReceiveMemoryWarning()                 // Dispose of any resources that can be recreated.      } }