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
  Swift - 给表格添加编辑功能(删除,插入)    Swift - 给表格添加编辑功能(删除,插入)
  Swift - 给表格添加编辑功能(删除,插入)    Swift - 给表格添加编辑功能(删除,插入)
3,代码如下
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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,我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"
        ]
         
        //创建表视图
        self.tableView = UITableView(frame:self.view.frame, style:UITableViewStyle.Grouped)
        self.tableView!.delegate = self
        self.tableView!.dataSource = self
        //创建一个重用的单元格
        self.tableView!.registerClass(UITableViewCell.self, forCellReuseIdentifier: "SwiftCell")
        self.view.addSubview(self.tableView!)
         
        //创建表头标签
        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)
        {
            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"
    }
     
    //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
         
        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("确定")
        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 "确定删除\(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.
    }
}
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