IOS录音功能的实现

IOS录音功能的实现

@implementation FKViewController

AVAudioRecorder* audioRecorder;

UIImage* recordImage;

UIImage* stopImage;

AVAudioPlayer* audioPlayer;

- (void)viewDidLoad

{

[super viewDidLoad];

recordImage = [UIImage imageNamed:@"record.png"];

stopImage = [UIImage imageNamed:@"stop.png"];

[self.recordBn setImage:recordImage forState:UIControlStateNormal];

// 获取当前应用的音频会话 // AVAudioSession * audioSession = [AVAudioSession sharedInstance];

// // 设置音频类别，PlayAndRecord——这说明当前音频会话即可播放、也可录制

// [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error: nil];

// // 激活当前应用的音频会话

// [audioSession setActive:YES error: nil];

}

//获取document目录的路径

- (NSString*) documentsPath {

if (! _documentsPath) {

NSArray *searchPaths =

NSSearchPathForDirectoriesInDomains

(NSDocumentDirectory, NSUserDomainMask, YES);

_documentsPath = [searchPaths objectAtIndex: 0];

}

return _documentsPath;

}

- (IBAction)clicked:(id)sender

{

if(audioRecorder != nil && audioRecorder.isRecording)

{

[audioRecorder stop];

[self.recordBn setImage:recordImage forState:UIControlStateNormal];

}

else

{

#pragma mark - 下面设置录音的参数和录音文件的保存路径等信息

// 获取音频文件的保存路径

NSString *destinationString = [[self documentsPath]

stringByAppendingPathComponent:@"sound.wav"];

NSURL *destinationURL = [NSURL fileURLWithPath:destinationString];

// 创建一个NSDictionary，用于保存录制属性

NSMutableDictionary *recordSettings = [[NSMutableDictionary alloc] init];

// 设置录制音频的格式

[recordSettings setObject:[NSNumber numberWithInt:kAudioFormatLinearPCM]

forKey: AVFormatIDKey];

NSString* sampleRate = [self.sampleRateSeg titleForSegmentAtIndex:

self.sampleRateSeg.selectedSegmentIndex];

// 设置录制音频的采样率

[recordSettings setObject:[NSNumber numberWithFloat:

sampleRate.floatValue] forKey: AVSampleRateKey];

// 设置录制音频的通道数

[recordSettings setObject:

[NSNumber numberWithInt:(self.stereoSwitch.on ? 2 : 1)]

forKey:AVNumberOfChannelsKey];

NSString* bitDepth = [self.bitDeptSeg titleForSegmentAtIndex:

self.bitDeptSeg.selectedSegmentIndex];

// 设置录制音频的每个样点的位数

[recordSettings setObject: [NSNumber numberWithInt:bitDepth.integerValue]

forKey:AVLinearPCMBitDepthKey];

// 设置录制音频采用高位优先的记录格式

[recordSettings setObject:[NSNumber numberWithBool:YES]

forKey:AVLinearPCMIsBigEndianKey];

// 设置采样信号采用浮点数

[recordSettings setObject:[NSNumber numberWithBool:YES]

forKey:AVLinearPCMIsFloatKey];

NSError *recorderSetupError = nil;

#pragma mark- 到这里开始实例化录音对象

// 初始化AVAudioRecorder

audioRecorder = [[AVAudioRecorder alloc] initWithURL:destinationURL

settings:recordSettings error:&recorderSetupError];

audioRecorder.delegate = self;

[audioRecorder record];

//设置单个按钮的状态为停止录音

[self.recordBn setImage:stopImage forState:UIControlStateNormal];

}

}

#pragma mark - 回放刚才录制的音频文件

- (IBAction)play:(id)sender

{

// 获取音频文件的保存路径

NSString *destinationString = [[self documentsPath]

stringByAppendingPathComponent:@"sound.wav"];

NSURL *url = [NSURL fileURLWithPath:destinationString];

// 创建AVAudioPlayer对象

audioPlayer = [[AVAudioPlayer alloc]

initWithContentsOfURL:url error: nil];

// 开始播放

[audioPlayer play];

}

#pragma mark- 录制音频的代理方法

- (void)audioRecorderBeginInterruption:(AVAudioRecorder *)recorder

{

NSLog(@"被中断！");

}

- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)aRecorder

successfully:(BOOL)flag

{

if(flag)

{

NSLog(@"录制完成！！");

}

}

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