iOS开发-简单的录音与播放

#import "ViewController.h"

#import

#import

@interface ViewController ()

@property (strong, nonatomic)AVAudioRecorder  *audioRecorder;

@property (strong, nonatomic)AVAudioPlayer  *audioPlayer;

@end

@implementation ViewController

-(AVAudioRecorder*)audioRecorder{

    if (!_audioRecorder) {

        //保存路径

        NSString *path=[NSHomeDirectory() stringByAppendingString:@"Documents/record"];

        //录音设置

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

        //采样率

        [dictsetObject:[NSNumber numberWithInt:44100] forKey:AVSampleRateKey];

        //格式

        [dictsetObject:[NSNumber numberWithInt:kAudioFormatMPEG4AAC] forKey:AVFormatIDKey];

        //通道

        [dictsetObject:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey];

        //质量

        [dictsetObject:[NSNumber numberWithInt:AVAudioQualityHigh] forKey:AVEncoderAudioQualityKey];

        _audioRecorder=[[AVAudioRecorder alloc]initWithURL:[NSURL fileURLWithPath:path] settings:dict error:nil];

    }

    return _audioRecorder;

}

-(AVAudioPlayer*)audioPlayer{

    if (!_audioPlayer) {

        NSString *path=[NSHomeDirectory() stringByAppendingString:@"Documents/record"];

        _audioPlayer=[[AVAudioPlayer alloc]initWithContentsOfURL:[NSURL fileURLWithPath:path] error:nil];

        [_audioPlayer prepareToPlay];

    }

    return _audioPlayer;

}

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

}

- (IBAction)caijiAction:(UIButton*)sender {

    if(sender.selected) {

        [self.audioRecorder stop];

    }else{

        [self.audioRecorder record];

    }

    sender.selected=!sender.selected;

}

- (IBAction)playAction:(UIButton*)sender {

    if(sender.selected) {

        [self.audioPlayerstop];

    }else{

        [self.audioPlayerplay];

    }

    sender.selected=!sender.selected;

}

@end

注：必要的参数设置

 AVFormatIDKey  录制音频的格式。

kAudioFormatLinearPCM: lpcm格式 

kAudioFormatAC3: ac-3格式

kAudioFormatMPEG4AAC: aac格式

kAudioFormatMPEG4CELP: celp格式 

kAudioFormatMPEG4HVXC: hvxc格式 

kAudioFormatMPEG4Layer1: mp1格式 

kAudioFormatMPEG4Layer2: mp2 格式 

kAudioFormatMPEG4Layer3: mp3 格式 

kAudioFormatTimeCode: time格式 

kAudioFormatMIDIStream: midi格式 

kAudioFormatAppleLossless：alac格式  

AVSampleRateKey 录制音频时的采用视频

AVNumberOfChannelsKey 录制音频时的通道数量

AVEncoderAudioQualityKey  录制音频的质量

AVAudioQualityMin 

AVAudioQualityLow

AVAudioQualityMedium

AVAudioQualityHigh

AVAudioQualityMax