swift __1 试写第一个swift程序
参照：http://swiftist.org/topics/96?page=2#comments
发现有几个地方一直报错，自己修改了下，有可能是xcode6更新导致
代码写的比较乱，这是我的硬伤，这次注释还是后面加上的，这也是我的硬伤，需要改。养成良好的代码习惯。
下面贴上自己的代码
// // ViewController.swift // SwiftCounter // // Created by 三十一 on 14-8-20. // Copyright (c) 2014年 yetuoxun. All rights reserved. // import UIKit class 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); } }
