Utility 1 Create a 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! 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) //タイマーを作る. Timer.scheduledTimer(timeInterval: 0.1, target: self, selector: #selector(ViewController.onUpdate(timer:)), userInfo: nil, repeats: true) } //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! 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) //タイマーを作る. NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: #selector(ViewController.onUpdate(_:)), userInfo: nil, repeats: true) } //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