iOS development--practical technical article Swift & Accelerometer and Gyroscope
Last Update:2015-06-07
Source: Internet
Author: User
<span id="Label3"></p><p style="text-align: center;"><p style="text-align: center;"><span style="font-size: 18pt;">Accelerometers and gyroscopes</span></p></p><p><p></p></p><pre><span style="color: #008080;"><span style="color: #008080;">1</span></span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">return button Events</span></span><span style="color: #008080;"><span style="color: #008080;">2</span></span> <span style="color: #000000;"><span style="color: #000000;">@IBAction func backbuttonclick ()</span></span><span style="color: #008080;"><span style="color: #008080;">3</span></span> <span style="color: #000000;"><span style="color: #000000;"> {</span></span><span style="color: #008080;"><span style="color: #008080;">4</span></span>Self.navigationcontroller?. Popviewcontrolleranimated (<span style="color: #0000ff;"><span style="color: #0000ff;">true</span></span><span style="color: #000000;"><span style="color: #000000;">)</span></span><span style="color: #008080;"><span style="color: #008080;">5</span></span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;">6</span></span> <span style="color: #008080;"><span style="color: #008080;">7</span></span> <span style="color: #008080;"><span style="color: #008080;">8</span></span>@IBOutlet var xlabel:uilabel!<span style="color: #008080;"><span style="color: #008080;">9</span></span>@IBOutlet var ylabel:uilabel!<span style="color: #008080;"><span style="color: #008080;">Ten</span></span>@IBOutlet var zlabel:uilabel!<span style="color: #008080;"><span style="color: #008080;"></span> one</span> <span style="color: #008080;"><span style="color: #008080;"></span> a</span>@IBOutlet var orientationlabel:uilabel!<span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Accelerometer Manager-all operations will be taken over by this motionmanager.</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span>var motionmanager:cmmotionmanager!<span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Override</span></span><span style="color: #000000;"><span style="color: #000000;">func viewdidload () {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #000000;"><span style="color: #000000;">super.viewdidload ()</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span>Titlelabel.text =<span style="color: #000000;"><span style="color: #000000;">titlestring</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span> <span style="color: #008080;"><span style="color: #008080;"></span> a</span> <span style="color: #008080;"><span style="color: #008080;"></span> at</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">------coremotion Accelerometer</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Motionmanager = Cmmotionmanager ()<span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Note that Cmmotionmanager is not a single case</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Motionmanager.accelerometerupdateinterval =<span style="color: #800080;"><span style="color: #800080;">0.1</span></span><span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">set Read time interval</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>Motionmanager.accelerometeravailable<span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">determine if an accelerometer can be used</span></span><span style="color: #008080;"><span style="color: #008080;"></span> in</span> <span style="color: #000000;"><span style="color: #000000;"> {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">get the main thread concurrent queue, with the new UI in the main</span> thread</span><span style="color: #008080;"><span style="color: #008080;"></span> to</span>Motionmanager.startaccelerometerupdatestoqueue (nsoperationqueue.mainqueue (), withhandler: {(var accelerometerData : cmaccelerometerdata, var error:nserror?) -Void<span style="color: #0000ff;"><span style="color: #0000ff;">inch</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>error! =<span style="color: #000000;"><span style="color: #000000;">Nil</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;"> {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> *</span>Self.motionManager.stopAccelerometerUpdates ()<span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">stop using the accelerometer</span></span><span style="color: #008080;"><span style="color: #008080;"></span> $</span>}<span style="color: #0000ff;"><span style="color: #0000ff;">Else</span></span><span style="color: #008080;"><span style="color: #008080;">Panax Notoginseng</span></span> <span style="color: #000000;"><span style="color: #000000;"> {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> the</span>Self.xLabel.text =<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">x:\ (accelerometerdata!. Acceleration.x)</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span>Self.yLabel.text =<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">y:\ (accelerometerdata!. Acceleration.y)</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> a</span>Self.zLabel.text =<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">z:\ (accelerometerdata!. Acceleration.z)</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span> <span style="color: #000000;"><span style="color: #000000;"> })</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> $</span> <span style="color: #008080;"><span style="color: #008080;"></span> $</span>}<span style="color: #0000ff;"><span style="color: #0000ff;">Else</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #000000;"><span style="color: #000000;"> {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Let Aler = Uialertview (title:<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">your device does not support the</span> accelerometer</span><span style="color: #800000;"><span style="color: #800000;">"</span></span>, message:nil,<span style="color: #0000ff;"><span style="color: #0000ff;">Delegate</span></span>: nil, cancelbuttontitle:<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">OK</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">)</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;">aler.show ()</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;">Wuyi</span></span> <span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> wu</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Sensing device Orientation-turn on monitoring device orientation</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #000000;"><span style="color: #000000;">uidevice.currentdevice (). begingeneratingdeviceorientationnotifications ()</span></span><span style="color: #008080;"><span style="color: #008080;"></span> about</span> <span style="color: #008080;"><span style="color: #008080;"></span> $</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">add notifications to monitor device orientation changes</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Nsnotificationcenter.defaultcenter (). addobserver (self, selector:<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">receivedrotation</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>, name:uideviceorientationdidchangenotification,<span style="color: #0000ff;"><span style="color: #0000ff;">Object</span></span><span style="color: #000000;"><span style="color: #000000;">: Nil)</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Turn off monitoring device orientation</span></span><span style="color: #008080;"><span style="color: #008080;"></span> a</span> <span style="color: #000000;"><span style="color: #000000;">uidevice.currentdevice (). endgeneratingdeviceorientationnotifications ()</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Override</span></span><span style="color: #000000;"><span style="color: #000000;">func didreceivememorywarning () {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> $</span> <span style="color: #000000;"><span style="color: #000000;">super.didreceivememorywarning ()</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Dispose of any resources the can be Recreated.</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">MARK:-judging Device Direction Agent method</span></span><span style="color: #008080;"><span style="color: #008080;"></span> in</span> <span style="color: #000000;"><span style="color: #000000;">func receivedrotation ()</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;"> {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span>var device =<span style="color: #000000;"><span style="color: #000000;">Uidevice.currentdevice ()</span></span><span style="color: #008080;"><span style="color: #008080;"></span> about</span> <span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>Device.orientation = =<span style="color: #000000;"><span style="color: #000000;">Uideviceorientation.unknown</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;"> {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span>Orientationlabel.text =<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Unknown</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> +</span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Else</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>Device.orientation = =<span style="color: #000000;"><span style="color: #000000;">uideviceorientation.portrait</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;"> {</span></span><span style="color: #008080;"><span style="color: #008080;">Bayi</span></span>Orientationlabel.text =<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Portrait</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Else</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>Device.orientation = =<span style="color: #000000;"><span style="color: #000000;">Uideviceorientation.portraitupsidedown</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #000000;"><span style="color: #000000;"> {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Orientationlabel.text =<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Portraitupsidedown</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Else</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>Device.orientation = =<span style="color: #000000;"><span style="color: #000000;">Uideviceorientation.landscapeleft</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;"> {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span>Orientationlabel.text =<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Landscapeleft</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Else</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>Device.orientation = =<span style="color: #000000;"><span style="color: #000000;">Uideviceorientation.landscaperight</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;"> {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span>Orientationlabel.text =<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Landscaperight</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;">94</span></span>}<span style="color: #0000ff;"><span style="color: #0000ff;">Else</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>Device.orientation = =<span style="color: #000000;"><span style="color: #000000;">Uideviceorientation.faceup</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;"> {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span>Orientationlabel.text =<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Faceup</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;">98</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">Else</span></span> <span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>Device.orientation = =<span style="color: #000000;"><span style="color: #000000;">Uideviceorientation.facedown</span></span><span style="color: #008080;"><span style="color: #008080;"></span> about</span> <span style="color: #000000;"><span style="color: #000000;"> {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> -</span>Orientationlabel.text =<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">facedown</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #008080;"><span style="color: #008080;">101</span></span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;">102</span></span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;">103</span></span> <span style="color: #008080;"><span style="color: #008080;">104</span></span> <span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">MARK:-shaking Events</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Override</span></span>Func Motionbegan (motion:uieventsubtype, withevent<span style="color: #0000ff;"><span style="color: #0000ff;">Event</span></span><span style="color: #000000;"><span style="color: #000000;">: Uievent) {</span></span><span style="color: #008080;"><span style="color: #008080;">106</span></span> <span style="color: #008080;"><span style="color: #008080;">107</span></span>println<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">Motionbegan</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>)<span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Start Shaking</span></span><span style="color: #008080;"><span style="color: #008080;">108</span></span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;">109</span></span> <span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Override</span></span>Func motionended (motion:uieventsubtype, withevent<span style="color: #0000ff;"><span style="color: #0000ff;">Event</span></span><span style="color: #000000;"><span style="color: #000000;">: Uievent) {</span></span><span style="color: #008080;"><span style="color: #008080;">111</span></span>println<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">motionended</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>)<span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">Shaking End</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #000000;"><span style="color: #000000;"> }</span></span><span style="color: #008080;"><span style="color: #008080;">113</span></span> <span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #008080;"><span style="color: #008080;"></span> the</span> <span style="color: #0000ff;"><span style="color: #0000ff;">Override</span></span>Func motioncancelled (motion:uieventsubtype, withevent<span style="color: #0000ff;"><span style="color: #0000ff;">Event</span></span><span style="color: #000000;"><span style="color: #000000;">: Uievent) {</span></span><span style="color: #008080;"><span style="color: #008080;"></span> the</span>println<span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #800000;"><span style="color: #800000;">motioncancelled</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span>)<span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;">the <span style="color: #008000;">shaking was terminated unexpectedly</span></span><span style="color: #008080;"><span style="color: #008080;">117</span></span>}</pre><p><p></p></p><p><p>iOS development--practical technical article Swift & Accelerometer and Gyroscope</p></p></span>
