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  • Swift

    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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  • 原文地址:https://www.cnblogs.com/Free-Thinker/p/4838232.html
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