////  ViewController.swift//  SwiftCounter////  Created by 三十一 on 14-8-20.//  Copyright (c) 2014年 yetuoxun. All rights reserved.//import UIKitclass ViewController: UIViewController {        var timeLable:UILabel?//显示剩余时间    var timeButtons:[UIButton]? //设置时间的按钮数组    var startStopButton:UIButton? //启动 停止按钮    var clearButton :UIButton?  // 复位按钮    let timeButtonInfos = [("1分",5),("3分",180),("5分",300),("秒",1),]// 数组 记录选项    var remainingSeconds: Int = 0{        //通过willSet 方法实时监控remainingSeconds 变化 改变UI （个人理解  willSet 需要去求证）        willSet(newSeconds){            let mins = newSeconds/60            let seconds = newSeconds%60            self.timeLable!.text = NSString(format: "%02d:%02d", mins,seconds)        }    }        var isCounting :Bool = false{        //通过willSet 方法实时监控isCounting 变化 改变UI （个人理解  willSet 需要去求证）        willSet(newValue){            if newValue{                //启动timer                timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: "updateTimer:", userInfo: nil, repeats: true)            }else{                //销毁timer                timer?.invalidate()                timer = nil            }            //改变按钮可点击状态             setSettingButtonsEnabled(!newValue)        }            }        //改变按钮可点击状态    func setSettingButtonsEnabled(enabled: Bool) {        for button in self.timeButtons! {            button.enabled = enabled            button.alpha = enabled ? 1.0 : 0.3        }        clearButton!.enabled = enabled        clearButton!.alpha = enabled ? 1.0 : 0.3    }        //声明timer    var timer:NSTimer?        //override 关键字什么意思需要求证    override func viewDidLoad() {        super.viewDidLoad()        self.view.backgroundColor = UIColor.grayColor()        //初始化 数据及UI        setupTimeLable()        setuptimeButtons()        setupActionButtons()        // Do any additional setup after loading the view, typically from a nib.    }    override func didReceiveMemoryWarning() {        super.didReceiveMemoryWarning()        // Dispose of any resources that can be recreated.    }// 初始化显示时间lable    func setupTimeLable(){        timeLable = UILabel();        timeLable!.textColor = UIColor.whiteColor()        timeLable!.font = UIFont(name: "", size: 80)        timeLable!.backgroundColor = UIColor.blackColor()        timeLable!.textAlignment = NSTextAlignment.Center        self.view.addSubview(timeLable!)            }        //初始化 选择时间按钮    func setuptimeButtons(){        var buttons:[UIButton] = []        for (index,(title, _)) in enumerate(timeButtonInfos){            // 上行中 index title 均为 变量 title类似与 for(id temp in arr) 中的 temp               //初始化button 类似与 alloc] init            let button : UIButton = UIButton()            button.tag = index;            //设置标题            button.setTitle("\(title)", forState: UIControlState.Normal)            //设置背景            button.backgroundColor = UIColor.orangeColor()            //设置title各个状态下的颜色            button.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Normal)            button.setTitleColor(UIColor.blackColor(), forState: UIControlState.Highlighted)                        //按钮绑定时间 触发方法            button.addTarget(self, action: "timeButtonTapped:", forControlEvents: UIControlEvents.TouchUpInside)            //将button 加入buttons数组中 个人理解 需要求证            buttons.append(button)//            buttons.insert(button, atIndex: index)            //button 加入当前View            self.view.addSubview(button)        }        //数组传递 赋值        timeButtons = buttons    }            func setupActionButtons(){        startStopButton = UIButton()        startStopButton!.backgroundColor = UIColor.redColor()        startStopButton!.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Normal)        startStopButton!.setTitleColor(UIColor.blackColor(), forState: UIControlState.Highlighted)        startStopButton!.setTitle("启动/停止", forState: UIControlState.Normal)        startStopButton!.addTarget(self, action: "startStopButtonTapped:", forControlEvents: UIControlEvents.TouchUpInside)        self.view.addSubview(startStopButton!)                        clearButton = UIButton()        clearButton!.backgroundColor = UIColor.redColor()        clearButton!.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Normal)        clearButton!.setTitleColor(UIColor.blackColor(), forState: UIControlState.Highlighted)        clearButton!.setTitle("复位", forState: UIControlState.Normal)        clearButton!.addTarget(self, action: "clearButtonTapped:", forControlEvents: UIControlEvents.TouchUpInside)        self.view.addSubview(clearButton!)    }            func startStopButtonTapped(sender:UIButton){        isCounting = !isCounting        if isCounting {            createAndFireLocalNotificationAfterSeconds(remainingSeconds)        } else {            println("111111111111111")            //敲这段代码时间 发现通知闪一下不见了  怀疑是在后台 程序仍可运行这段代码 输出显示我的判断是对的~~            //但是如果移除这行代码  通知何时移除？？？？            //结论 定时器 在app 进入后台时仍可运行  这是与之前的区别，之前程序进入后台时  app 会刮起 现在貌似不会了  需求证            //另外 本地通知 只要app 位于后台才会显示 这与之前是一样的            UIApplication.sharedApplication().cancelAllLocalNotifications()        }    }            func clearButtonTapped(sender : UIButton){        remainingSeconds = 0    }            func timeButtonTapped(sender: UIButton){        let (_,seconds) = timeButtonInfos[sender.tag]        remainingSeconds += seconds    }            func updateTimer(timer11: NSTimer) {        remainingSeconds -= 1        if remainingSeconds <= 0 {            let alert = UIAlertView()            alert.title = "计时完成！"            alert.message = ""            alert.addButtonWithTitle("OK")            alert.show()            timer?.invalidate()            timer = nil            setSettingButtonsEnabled(true)            startStopButtonTapped(startStopButton!);        }    }        override func  viewWillLayoutSubviews() {        super.viewWillLayoutSubviews()        timeLable!.frame = CGRectMake(10, 40, self.view.bounds.size.width - 20, 120)                let gap = ( self.view.bounds.size.width - 10*2 - (CGFloat(timeButtons!.count) * 64) ) / CGFloat(timeButtons!.count - 1)        for (index, button) in enumerate(timeButtons!) {            let buttonLeft = 10 + (64 + gap) * CGFloat(index)            button.frame = CGRectMake(buttonLeft, self.view.bounds.size.height-120, 64, 44)        }                startStopButton!.frame = CGRectMake(10, self.view.bounds.size.height-60, self.view.bounds.size.width-20-100, 44)        clearButton!.frame = CGRectMake(10+self.view.bounds.size.width-20-100+20, self.view.bounds.size.height-60, 80, 44)    }    func createAndFireLocalNotificationAfterSeconds(seconds: Int) {                UIApplication.sharedApplication().cancelAllLocalNotifications()        let notification = UILocalNotification()        //        let timeIntervalSinceNow = seconds.bridgeToObjectiveC().doubleValue//        let ssy = seconds//        notification.fireDate = NSDate(timeIntervalSinceNow:ssy);        let ssy:NSTimeInterval = NSTimeInterval(seconds)        notification.fireDate = NSDate(timeIntervalSinceNow: ssy)                notification.timeZone = NSTimeZone.systemTimeZone();        notification.alertBody = "计时完成！";                UIApplication.sharedApplication().scheduleLocalNotification(notification);            }    }