ios开发——实用技术篇Swift篇&录音

录音

 

  1     // MARK: - 录音

  2     /*----- 录音 ------*/

  3     

  4     var recorder:AVAudioRecorder?   //录音器

  5     var player:AVAudioPlayer?   //播放器

  6     var recorderSettingsDic:[NSObject : AnyObject]?   //录音器设置参数数组

  7     var volumeTimer:NSTimer!//定时器线程， 刷新音量

  8     var aacPath:String? //录音存储路径

  9     

 10      @IBOutlet var soundLodingImageView:UIImageView!//录音音量显示视图

 11     

 12     

 13     //按下录音

 14     @IBAction func downAction()

 15     {

 16         var error:NSError?

 17         

 18         //初始化录音器

 19         recorder = AVAudioRecorder(URL: NSURL(string: aacPath!), settings: recorderSettingsDic, error:  &error)

 20         

 21         

 22         if ((recorder) != nil) {

 23             

 24             //开启仪表计数功能

 25             recorder!.meteringEnabled = true;

 26             

 27             //准备录音

 28             recorder!.prepareToRecord()

 29             

 30             //开始录音

 31             recorder!.record()

 32             

 33             //启动定时器 定时更新录音音量

 34             volumeTimer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: "levelTimer", userInfo: nil, repeats: true)

 35         }

 36         

 37     }

 38 

 39     

 40      //松开 结束录音

 41     @IBAction func upAction()

 42     {

 43         //停止录音

 44         recorder?.stop()

 45         

 46         //录制器释放

 47         recorder = nil

 48         

 49         //暂停定时器

 50         volumeTimer.invalidate()

 51         volumeTimer = nil

 52         

 53         //界面音量归0现实

 54         soundLodingImageView.image = UIImage(named: "RecordingSignal001")

 55     }

 56     

 57     //播放录制的声音

 58     @IBAction func playAction()

 59     {

 60         var playerError:NSError?

 61         

 62         //播放

 63         player = nil;

 64         player = AVAudioPlayer(contentsOfURL: NSURL(string: aacPath!), error: &playerError)

 65         

 66         if (player == nil)

 67         {

 68             println("ERror creating player: \(playerError?.description)")

 69         }else{

 70             player?.play()

 71         }

 72     }

 73     

 74     

 75     //定时器方法--检测录音音量

 76     func levelTimer()

 77     {

 78         recorder!.updateMeters()//刷新音量数据

 79         

 80         let averageV:Float = recorder!.averagePowerForChannel(0)//获取音量的平均值

 81         

 82         let maxV:Float = recorder!.peakPowerForChannel(0)//获取音量的最大值

 83         

 84         let lowPassResults:Double = pow(Double(10), Double(0.05 * maxV))

 85         println("\(lowPassResults)")

 86         

 87         

 88         if (lowPassResults>=0.8) {

 89             soundLodingImageView.image = UIImage(named: "RecordingSignal8.png")

 90         }else if(lowPassResults>=0.7){

 91             soundLodingImageView.image = UIImage(named: "RecordingSignal7.png")

 92         }else if(lowPassResults>=0.6){

 93             soundLodingImageView.image = UIImage(named: "RecordingSignal6.png")

 94         }else if(lowPassResults>=0.5){

 95             soundLodingImageView.image = UIImage(named: "RecordingSignal5.png")

 96         }else if(lowPassResults>=0.4){

 97             soundLodingImageView.image = UIImage(named: "RecordingSignal4.png")

 98         }else if(lowPassResults>=0.3){

 99             soundLodingImageView.image = UIImage(named: "RecordingSignal3.png")

100         }else if(lowPassResults>=0.2){

101             soundLodingImageView.image = UIImage(named: "RecordingSignal2.png")

102         }else if(lowPassResults>=0.1){

103             soundLodingImageView.image = UIImage(named: "RecordingSignal1.png")

104         }else{

105             soundLodingImageView.image = UIImage(named: "RecordingSignal1.png")

106         }

107         

108     }

 实现：

 1         titleLabel.text = titleString

 2         

 3         let mp3Path = NSBundle.mainBundle().pathForResource("xiaoPingGuo", ofType: "mp3")

 4         let fileUrl = NSURL.fileURLWithPath(mp3Path!)

 5         

 6         audioPlayer = AVAudioPlayer(contentsOfURL: fileUrl, error: nil)

 7         audioPlayer.prepareToPlay()

 8         

 9         

10         //以下录音使用

11         

12         //初始化录音器

13         let session:AVAudioSession = AVAudioSession.sharedInstance()

14         

15         //初始化一个NSError对象，失败的时候可以获取失败原因

16         var error:NSError?

17         

18         //设置录音类型

19         session.setCategory(AVAudioSessionCategoryPlayAndRecord, error: &error)

20         

21         //设置支持后台

22         session.setActive(true, error: &error)

23         

24         //获取Document目录

25 //        let docDir = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String

26         

27         //2015年5月2后修改

28         let docDir = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as! String

29         

30         //组合录音文件路径

31         aacPath = docDir + "/play.aac"

32         

33         //初始化字典

34         recorderSettingsDic = Dictionary()

35         

36         //字典添加设置参数

37         recorderSettingsDic!.updateValue(NSNumber(long: kAudioFormatMPEG4AAC), forKey: AVFormatIDKey)

38         recorderSettingsDic!.updateValue(NSNumber(long: 1000), forKey: AVSampleRateKey)

39         recorderSettingsDic!.updateValue(NSNumber(long: 2), forKey: AVNumberOfChannelsKey)

40         recorderSettingsDic!.updateValue(NSNumber(long: 8), forKey: AVLinearPCMBitDepthKey)

41         recorderSettingsDic!.updateValue(NSNumber(bool: false), forKey: AVLinearPCMIsBigEndianKey)

42         recorderSettingsDic!.updateValue(NSNumber(bool: false), forKey: AVLinearPCMIsFloatKey)