[功能]彈出對話筐 Alert & Alert 消失後並產生動作

功能---彈出對話匡Alert

//設定一個alert的標題和訊息

var alert = UIAlertController(title: "完成", message: "成功", preferredStyle: UIAlertControllerStyle.Alert) 

//增加一個alert按鈕

alert.addAction(UIAlertAction(title: “OK", style: UIAlertActionStyle.Default,handler: nil))

//讓alert呈現

self.presentViewController(alert, animated: true, completion: nil)

功能延伸---彈出對話匡Alert 消失後並產生動作

//設定一個alert的標題和訊息

var alert = UIAlertController(title: "完成", message: "恭喜得分", preferredStyle: UIAlertControllerStyle.Alert)

//增加一個alert按鈕,並且使他performSegue換到特定頁面

alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler:
    {(alert: UIAlertAction!) in self.performSegueWithIdentifier("to_record", sender: AnyObject?())}
    ))

//讓alert呈現

    self.presentViewController(alert, animated: true, completion: nil)

[功能]將json抓下來放進coredata

//當然前提也要先成立coredata並成立一個swift檔（create NSManagedObject Subclass)

import UIKitimport CoreDataclass ViewController: UIViewController,UITableViewDataSource,UITableViewDelegate {
    var result:Array<Product> = []

    @IBOutlet weak var tableViewCore: UITableView!

    var id_json: String = ""
    var name_json: String = ""
    var discount_json: String = ""



    override func viewDidLoad() {
        super.viewDidLoad()
          tableViewCore.delegate = self
          tableViewCore.dataSource = self
    
             
        var url = NSURL(string: "http://appapi999.scanallgoods.com/api/Product/GetProductInfo?QR_Code=5-z2ELfceDNDseP8EGOFwu0ssxwmLpxzp-UAelTXpgTF30o24a2CvTTcOMSB8dneH0")
    
        var data = NSData(contentsOfURL: url!)
    
        var json: AnyObject? = NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.allZeros, error:nil)
    
        id_json = json?.objectForKey("Product_ID") as! String
        name_json = json?.objectForKey("Product_Name") as! String
        discount_json = json?.objectForKey("Discount_Way") as! String
    
        println(id_json)
        println(name_json)
        println(discount_json)
            
    
        var appDele :AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
        var context:NSManagedObjectContext = appDele.managedObjectContext!
        var fetch:NSFetchRequest = NSFetchRequest(entityName: "Product")
        result = context.executeFetchRequest(fetch, error: nil) as! [Product]
       initData()
  
        var error: NSError?
        let fetchedResults = context.executeFetchRequest(fetch, error: &error)
            as! [NSManagedObject]?
    
        if let results = fetchedResults
        {
            for (var i=0; i < results.count; i++)
            {
                let single_result = results[i]
                let name_data = single_result.valueForKey("name") as! String
                let id_data = single_result.valueForKey("id") as! String
                let discount_data = single_result.valueForKey("discount") as! String
                println(name_data)
                println(id_data)
                println(discount_data)
                //uncomment this line for adding the stored object to the core data array                //name_list.append(single_result)            }
        }
        else
        {
            println("cannot read")
        }

    
         tableViewCore.reloadData()
    
    
        // Do any additional setup after loading the view, typically from a nib.    }

    func initData(){
        var appDele :AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
        var context:NSManagedObjectContext = appDele.managedObjectContext!
        var fetch:NSFetchRequest = NSFetchRequest(entityName: "Product")
        var product:Product
    
    
        product = NSEntityDescription.insertNewObjectForEntityForName("Product", inManagedObjectContext: context) as! Product
    
        product.name = name_json
       product.id = id_json
        product.discount = discount_json

        context.save(nil)    

    }

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

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell: UITableViewCell = tableViewCore.dequeueReusableCellWithIdentifier("Cell",forIndexPath: indexPath) as! UITableViewCell
        cell.textLabel!.text = result[indexPath.row].name
        cell.detailTextLabel?.text=result[indexPath.row].discount
        return cell
    }



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


}