ios开发——实用技术篇Swift篇&加速计和陀螺仪

加速计和陀螺仪

 

  1     //返回按钮事件

  2     @IBAction func backButtonClick()

  3     {

  4         self.navigationController?.popViewControllerAnimated(true)

  5     }

  6     

  7     

  8     @IBOutlet var xLabel:UILabel!

  9     @IBOutlet var yLabel:UILabel!

 10     @IBOutlet var zLabel:UILabel!

 11     

 12     @IBOutlet var orientationLabel:UILabel!

 13     

 14     //加速计管理者-所有的操作都会由这个motionManager接管

 15     var motionManager:CMMotionManager!

 16     

 17     override func viewDidLoad() {

 18         super.viewDidLoad()

 19         

 20         titleLabel.text = titleString

 21        

 22         

 23         

 24         //------ CoreMotion 加速计

 25         motionManager = CMMotionManager()//注意CMMotionManager不是单例

 26         motionManager.accelerometerUpdateInterval = 0.1//设置读取时间间隔

 27         

 28         if motionManager.accelerometerAvailable//判断是否可以使用加速度计

 29         {

 30             //获取主线程并发队列,在主线程里跟新UI

 31             motionManager.startAccelerometerUpdatesToQueue(NSOperationQueue.mainQueue(), withHandler: { (var accelerometerData:CMAccelerometerData?, var error:NSError?) -> Void in

 32                 

 33                 if error != nil

 34                 {

 35                     self.motionManager.stopAccelerometerUpdates()//停止使用加速度计

 36                 }else

 37                 {

 38                 

 39                     self.xLabel.text = "x:\(accelerometerData!.acceleration.x)"

 40                     self.yLabel.text = "Y:\(accelerometerData!.acceleration.y)"

 41                     self.zLabel.text = "Z:\(accelerometerData!.acceleration.z)"

 42                 }

 43             })

 44             

 45             

 46         }else

 47         {

 48             let aler = UIAlertView(title: "您的设备不支持加速计", message: nil, delegate: nil, cancelButtonTitle: "OK")

 49             aler.show()

 50         }

 51         

 52         

 53         

 54         //感知设备方向-开启监听设备方向

 55         UIDevice.currentDevice().beginGeneratingDeviceOrientationNotifications()

 56         

 57         //添加通知，监听设备方向改变

 58         NSNotificationCenter.defaultCenter().addObserver(self, selector: "receivedRotation", name: UIDeviceOrientationDidChangeNotification, object: nil)

 59         

 60         //关闭监听设备方向

 61         UIDevice.currentDevice().endGeneratingDeviceOrientationNotifications()

 62     }

 63 

 64     override func didReceiveMemoryWarning() {

 65         super.didReceiveMemoryWarning()

 66         // Dispose of any resources that can be recreated.

 67     }

 68     

 69     

 70     // MARK: - 判断设备方向代理方法

 71     func receivedRotation()

 72     {

 73         var device = UIDevice.currentDevice()

 74         

 75         if device.orientation == UIDeviceOrientation.Unknown

 76         {

 77             orientationLabel.text = "Unknown"

 78         }

 79         else if device.orientation == UIDeviceOrientation.Portrait

 80         {

 81             orientationLabel.text = "Portrait"

 82         }

 83         else if device.orientation == UIDeviceOrientation.PortraitUpsideDown

 84         {

 85              orientationLabel.text = "PortraitUpsideDown"

 86         }

 87         else if device.orientation == UIDeviceOrientation.LandscapeLeft

 88         {

 89              orientationLabel.text = "LandscapeLeft"

 90         }

 91         else if device.orientation == UIDeviceOrientation.LandscapeRight

 92         {

 93              orientationLabel.text = "LandscapeRight"

 94         }else if device.orientation == UIDeviceOrientation.FaceUp

 95         {

 96              orientationLabel.text = "FaceUp"

 97         }

 98         else  if device.orientation == UIDeviceOrientation.FaceDown

 99         {

100              orientationLabel.text = "FaceDown"

101         }

102     }

103     

104     // MARK: - 摇晃事件

105     override func motionBegan(motion: UIEventSubtype, withEvent event: UIEvent) {

106         

107         println("motionBegan")//开始摇晃

108     }

109     

110     override func motionEnded(motion: UIEventSubtype, withEvent event: UIEvent) {

111         println("motionEnded")//摇晃结束

112     }

113     

114     

115     override func motionCancelled(motion: UIEventSubtype, withEvent event: UIEvent) {

116         println("motionCancelled")//摇晃被意外终止

117     }