Swift 语言概览 -自己在Xcode6 动手写2-tableView

import UIKit

class ViewController: UIViewController ,UITableViewDelegate, UITableViewDataSource
{
var tableView : UITableView?
var items :NSMutableArray?
var leftBtn:UIButton?

override func viewDidLoad() {
super.viewDidLoad()
self.title = "I love Swift"
self.items = NSMutableArray()
// self.items?.addObject("1","2")
// Do any additional setup after loading the view, typically from a nib.
setupViews()
setupRightBarButtonItem()
setupLeftBarButtonItem();
}

func setupViews()
{
self.tableView = UITableView(frame:self.view!.frame)
self.tableView!.delegate = self
self.tableView!.dataSource = self
self.tableView!.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell")
self.view?.addSubview(self.tableView)
}

func setupLeftBarButtonItem()
{
self.leftBtn = UIButton.buttonWithType(UIButtonType.Custom) as? UIButton
self.leftBtn!.frame = CGRectMake(0,0,50,40)
self.leftBtn?.setTitleColor(UIColor.redColor(), forState: UIControlState.Normal)
self.leftBtn?.setTitle("Edit", forState: UIControlState.Normal)
self.leftBtn!.tag = 100
self.leftBtn!.userInteractionEnabled = false
self.leftBtn?.addTarget(self, action: "leftBarButtonItemClicked", forControlEvents: UIControlEvents.TouchUpInside)
var barButtonItem = UIBarButtonItem(customView: self.leftBtn)
self.navigationItem!.leftBarButtonItem = barButtonItem
}

func setupRightBarButtonItem()
{
var barButtonItem = UIBarButtonItem(title: "Add", style: UIBarButtonItemStyle.Plain, target: self, action: "rightBarButtonItemClicked")
self.navigationItem!.rightBarButtonItem = barButtonItem
}

func rightBarButtonItemClicked()
{

var row = self.items!.count
var indexPath = NSIndexPath(forRow:row,inSection:0)
self.items?.addObject("1")
self.tableView?.insertRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Left)
self.leftBtn!.userInteractionEnabled = true
}

func leftBarButtonItemClicked()
{
if (self.leftBtn!.tag == 100)
{
self.tableView?.setEditing(true, animated: true)
self.leftBtn!.tag = 200
self.leftBtn?.setTitle("Done", forState: UIControlState.Normal)
}
else
{
self.tableView?.setEditing(false, animated: true)
self.leftBtn!.tag = 100
self.leftBtn?.setTitle("Edit", forState: UIControlState.Normal)
}

}

override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}

func tableView(tableView: UITableView!, numberOfRowsInSection section: Int) -> Int
{
return self.items!.count
}

func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell!
{
let cell = tableView .dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as UITableViewCell
cell.textLabel.text = String(format: "%i", indexPath.row+1)
return cell
}

func tableView(tableView: UITableView!, canEditRowAtIndexPath indexPath: NSIndexPath!) -> Bool
{
return true
}

func tableView(tableView: UITableView!, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath!)
{
self.items?.removeObjectAtIndex(indexPath.row)

self.tableView?.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Top)
if (self.items!.count == 0)
{
self.leftBtn!.userInteractionEnabled = false
}

}

func tableView(tableView: UITableView!, editingStyleForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCellEditingStyle
{
return (UITableViewCellEditingStyle.Delete)
}

func tableView(tableView: UITableView!, canMoveRowAtIndexPath indexPath: NSIndexPath!) -> Bool
{
return true
}

func tableView(tableView: UITableView!, moveRowAtIndexPath sourceIndexPath: NSIndexPath!, toIndexPath destinationIndexPath: NSIndexPath!)
{
self.tableView?.moveRowAtIndexPath(sourceIndexPath, toIndexPath: destinationIndexPath)
self.items?.exchangeObjectAtIndex(sourceIndexPath.row, withObjectAtIndex: destinationIndexPath.row)
}

func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!)
{
println("row = %d",indexPath.row)
}

}