Utility 2 Stop the timer

Swift3.0 // // ViewController.swift // Utility000_3.0 // // Created by KimikoWatanabe on 2016/08/22. // Copyright © 2016年 FaBo, Inc. All rights reserved. // import UIKit class ViewController: UIViewController { //時間計測用の変数. var cnt : Float = 0 //時間表示用のラベル. var myLabel : UILabel! //タイマー. var timer : Timer! override func viewDidLoad() { //ラベルを作る. myLabel = UILabel(frame: CGRect(x:0,y:0,width:200,height:50)) myLabel.backgroundColor = UIColor.orange myLabel.layer.masksToBounds = true myLabel.layer.cornerRadius = 20.0 myLabel.text = "Time:\(cnt)" myLabel.textColor = UIColor.white myLabel.shadowColor = UIColor.gray myLabel.textAlignment = NSTextAlignment.center myLabel.layer.position = CGPoint(x: self.view.bounds.width/2,y: 200) self.view.backgroundColor = UIColor.cyan self.view.addSubview(myLabel) //タイマー停止ボタンを作る. let myButton = UIButton(frame: CGRect(x:0, y:0, width:200, height:50)) myButton.layer.masksToBounds = true myButton.layer.cornerRadius = 20.0 myButton.backgroundColor = UIColor.blue myButton.setTitle("Stop Timer", for: UIControlState.normal) myButton.layer.position = CGPoint(x:self.view.center.x, y:self.view.center.y + 100) myButton.addTarget(self, action: #selector(ViewController.onMyButtonClick(sender:)), for: UIControlEvents.touchUpInside) self.view.addSubview(myButton) //タイマーを作る. timer = Timer.scheduledTimer(timeInterval: 0.1, target: self, selector: #selector(ViewController.onUpdate(timer:)), userInfo: nil, repeats: true) } //ボタンが押された時に呼ばれるメソッド. func onMyButtonClick(sender : UIButton){ //timerが動いてるなら. if timer.isValid == true { //timerを破棄する. timer.invalidate() //ボタンのタイトル変更. sender.setTitle("Start Timer", for: UIControlState.normal) } else{ //timerを生成する. timer = Timer.scheduledTimer(timeInterval: 0.1, target: self, selector: #selector(ViewController.onUpdate(timer:)), userInfo: nil, repeats: true) //ボタンのタイトル変更. sender.setTitle("Stop Timer", for: UIControlState.normal) } } //NSTimerIntervalで指定された秒数毎に呼び出されるメソッド. func onUpdate(timer : Timer){ cnt += 0.1 //桁数を指定して文字列を作る. let str = "Time:".appendingFormat("%.1f",cnt) myLabel.text = str } } Swift 2.3 // // ViewController.swift // Utility000_2.3 // // Created by KimikoWatanabe on 2016/08/22. // Copyright © 2016年 FaBo, Inc. All rights reserved. // import UIKit class ViewController: UIViewController { //時間計測用の変数. var cnt : Float = 0 //時間表示用のラベル. var myLabel : UILabel! //タイマー. var timer : NSTimer! override func viewDidLoad() { //ラベルを作る. myLabel = UILabel(frame: CGRectMake(0,0,200,50)) myLabel.backgroundColor = UIColor.orangeColor() myLabel.layer.masksToBounds = true myLabel.layer.cornerRadius = 20.0 myLabel.text = "Time:\(cnt)" myLabel.textColor = UIColor.whiteColor() myLabel.shadowColor = UIColor.grayColor() myLabel.textAlignment = NSTextAlignment.Center myLabel.layer.position = CGPoint(x: self.view.bounds.width/2,y: 200) self.view.backgroundColor = UIColor.cyanColor() self.view.addSubview(myLabel) //タイマー停止ボタンを作る. let myButton = UIButton(frame: CGRectMake(0, 0, 200, 50)) myButton.layer.masksToBounds = true myButton.layer.cornerRadius = 20.0 myButton.backgroundColor = UIColor.blueColor() myButton.setTitle("Stop Timer", forState: UIControlState.Normal) myButton.layer.position = CGPointMake(self.view.center.x, self.view.center.y + 100) myButton.addTarget(self, action: #selector(ViewController.onMyButtonClick(_:)), forControlEvents: UIControlEvents.TouchUpInside) self.view.addSubview(myButton) //タイマーを作る. timer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: #selector(ViewController.onUpdate(_:)), userInfo: nil, repeats: true) } //ボタンが押された時に呼ばれるメソッド. func onMyButtonClick(sender : UIButton){ //timerが動いてるなら. if timer.valid == true { //timerを破棄する. timer.invalidate() //ボタンのタイトル変更. sender.setTitle("Start Timer", forState: UIControlState.Normal) } else{ //timerを生成する. timer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: #selector(ViewController.onUpdate(_:)), userInfo: nil, repeats: true) //ボタンのタイトル変更. sender.setTitle("Stop Timer", forState: UIControlState.Normal) } } //NSTimerIntervalで指定された秒数毎に呼び出されるメソッド. func onUpdate(timer : NSTimer){ cnt += 0.1 //桁数を指定して文字列を作る. let str = "Time:".stringByAppendingFormat("%.1f",cnt) myLabel.text = str } } 2.3と3.0の差分 UIColorの参照方法が変更(UIColor.grayColor()->UIColor.gray) CGRect,CGPointの初期化方法の変更(CGRectMake,CGPointMakeの廃止) NSTimerの廃止、Timerに変更 scheduledTimerWithTimeIntervalがscheduledTimer(timeInterval:に変更 stringByAppendingFormatがappendingFormatに変更