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.
}
} |