swift - 表格的编辑功能（添加、删除）

class TenthViewController: UIViewController,UITableViewDelegate,UITableViewDataSource,UIGestureRecognizerDelegate {
    
    var tableView:UITableView?
    
    var oneArray = NSMutableArray()
    var twoArray = NSMutableArray()
    var array = NSMutableArray()
    
    var hadHeaders:[String]?
    
    
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        self.view.backgroundColor = UIColor.whiteColor()
        self.title = "表格的编辑功能（删除、插入）"
        
        initTabelView()
        
        oneArray = ["1","2","3"];
        twoArray = ["one","two","three"];
        array.addObjectsFromArray([oneArray,twoArray])
    }
    
    func initTabelView()
    {
        let headerLab = UILabel()
        headerLab.frame = CGRectMake(0, 0, SCREEN_WIDTH, 20)
        headerLab.backgroundColor = UIColor.orangeColor()
        headerLab.textColor = UIColor.whiteColor()
        headerLab.numberOfLines = 0
        headerLab.lineBreakMode = NSLineBreakMode.ByWordWrapping
        headerLab.text = "这个是个表头"
        headerLab.font = UIFont.systemFontOfSize(20)
        
        let footerLab = UILabel()
        footerLab.frame = CGRectMake(0, 0, SCREEN_WIDTH, 20)
        footerLab.backgroundColor = UIColor.orangeColor()
        footerLab.textColor = UIColor.whiteColor()
        footerLab.numberOfLines = 0
        footerLab.lineBreakMode = NSLineBreakMode.ByWordWrapping
        footerLab.text = "这个是个表尾"
        footerLab.font = UIFont.systemFontOfSize(20)
        
        self.hadHeaders = [
            
            "这是第一个区",
            "这是第二个区"
        ]
        
        tableView = UITableView(frame: self.view.frame, style: .Plain)
        tableView!.rowHeight = 50
        tableView!.delegate = self
        tableView!.dataSource = self
        tableView?.tableFooterView = footerLab
        tableView?.tableHeaderView = headerLab
        self.view.addSubview(tableView!)
        
        //注册一个重用的单元格
        tableView?.registerClass(UITableViewCell.self, forCellReuseIdentifier: "swiftcells")
        
        //绑定对长按的响应
        let longPress = UILongPressGestureRecognizer(target: self,action: #selector(tableviewCellLongPressed(_:)))
        //代理
        longPress.delegate = self
        longPress.minimumPressDuration = 1.0
        //将长按手势添加到需要实现长按操作的视图里
        self.tableView!.addGestureRecognizer(longPress)
    }

func tableviewCellLongPressed(gestureRecognizer:UILongPressGestureRecognizer)
    {
        if gestureRecognizer.state == UIGestureRecognizerState.Began {
            print("开始")
        }
        
        if gestureRecognizer.state == UIGestureRecognizerState.Changed {
            print("已经选择")
        }
        
        if gestureRecognizer.state == UIGestureRecognizerState.Ended {
            
            print("结束")
            
            //在正常状态和编辑状态之间切换
            if tableView?.editing == false {
                
                tableView?.setEditing(true, animated: true)
            }else{
                
                tableView?.setEditing(false, animated: true)
            }
        }
        
    }

func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        
        return array.count
    }
    
    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        
        return array.objectAtIndex(section).count
    }
    
    //设置区头
    func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
        
        var headers = self.hadHeaders!
        return headers[section]
    }
    
    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        
        let identify:String = "swiftcells"
        let cell = tableView.dequeueReusableCellWithIdentifier(identify,forIndexPath: indexPath) as UITableViewCell
        
        cell.selectionStyle = UITableViewCellSelectionStyle.None
        cell.accessoryType = UITableViewCellAccessoryType.DisclosureIndicator
        
        cell.textLabel?.text = array.objectAtIndex(indexPath.section).objectAtIndex(indexPath.row) as? String
        
        return cell
    }
    
    func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        
        tableView.deselectRowAtIndexPath(indexPath, animated: true)
        
        let itemString = array[indexPath.section][indexPath.row]
        
        let alertView = UIAlertView()
        alertView.title = "提示"
        alertView.message = "你选中了\(itemString)"
        alertView.addButtonWithTitle("确定")
        alertView.show()
    }
    
    func tableView(tableView: UITableView, editingStyleForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCellEditingStyle {
        
        //第一个区是插入操作，第二个去是删除操作
        if indexPath.section == 1 {
            
            return UITableViewCellEditingStyle.Insert //插入
        }
        
        return UITableViewCellEditingStyle.Delete //删除
    }
    
    //左滑删除的具体实现
    func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
        
        if editingStyle == UITableViewCellEditingStyle.Delete {
            
            array[indexPath.section].removeObjectAtIndex(indexPath.row)
            
            tableView.reloadData()
            tableView.setEditing(true, animated: true)
            
        }else if editingStyle == UITableViewCellEditingStyle.Insert
        {
            array[indexPath.section].insertObject("插入一项新的", atIndex: indexPath.row + 1)
            tableView.reloadData()
        }
        
    }