NSTimerを使って時計表示をしてみる(2)

Timerの生成とRun Loopの登録を別に行う方法です。
NSTimerは毎回作らないといけない模様 (使いまわそうとしても開始しなかった為)

---
import UIKit

class ViewController: UIViewController {

    var count:Int = 0
    var timer:NSTimer? = nil     // タイマー
   
   
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        /*
        timer = NSTimer(timeInterval: 0.01,        // 繰り返し時間(秒)
                        target: self,
                        selector: (#selector(ViewController.DispWatchCount)),    // ハンドラの指定
                        userInfo: nil,
                        repeats: true    // 繰り返し
        )
        NSRunLoop.currentRunLoop().addTimer(timer!, forMode: NSDefaultRunLoopMode)
         */
       
    }

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

    @IBOutlet weak var DispTime: UILabel!
   
    @IBAction func stop(sender: AnyObject) {
        timer?.invalidate()
    }
   
    @IBAction func ButtonStart(sender: AnyObject) {
        timer = NSTimer(timeInterval: 0.01,        // 繰り返し時間(秒)
            target: self,
            selector: (#selector(ViewController.DispWatchCount)),    // ハンドラの指定
            userInfo: nil,
            repeats: true    // 繰り返し
        )  // Timerを生成

        NSRunLoop.currentRunLoop().addTimer(timer!, forMode: NSDefaultRunLoopMode)  // timerを開始 (Run Loopに登録)
    }

    @IBAction func ButtonStop(sender: AnyObject) {
        timer?.invalidate()     // timerを停止
    }
   
    // Timer handler
    func DispWatchCount(){
        let date = NSDate()
       
        let formatter = NSDateFormatter()
        formatter.dateFormat = "HH:mm:ss:SS"
        let dispTime = formatter.stringFromDate(date)
       
        /* メンバーにアクセスする場合
        let calender = NSCalendar.currentCalendar()
        let component = calender.components([NSCalendarUnit.Year, NSCalendarUnit.Month, NSCalendarUnit.Day, NSCalendarUnit.Hour, NSCalendarUnit.Minute, NSCalendarUnit.Second], fromDate: date)
        let dispTime = String(component.hour) + ":" + String(component.minute) + ":" + String(component.second)
        */
        DispTime.text = dispTime
        // count += 1
        // DispTime.text = String(count)
    }
}