废话不说了 不知道aac可以百度一下 下面直接上代码，一个h文件 一个m文件 搞定！
#import <AVFoundation/AVFoundation.h>
#import <UIKit/UIKit.h> @interface AudioRecord : NSObject<AVAudioRecorderDelegate, AVAudioPlayerDelegate> /**
* 获取单例对象
*/
+(AudioRecord *)shareAudioRecord; /**
* 将要录音
*
* @return <#return value description#>
*/
- (BOOL)canRecord; /**
* 停止录音
*/
- (void)stopRecord; /**
* 开始录音
*/
- (void)onStatrRecord; /**
* 初始化音频检查
*/
-(void)initRecordSession; /**
* 初始化文件存储路径
*
* @return <#return value description#>
*/
- (NSString *)audioRecordingPath; /**
* 录音器
*/
@property (nonatomic, retain) AVAudioRecorder *audioRecorder; /**
* 录音播放器
*/
@property (nonatomic, retain) AVAudioPlayer *audioPlayer; @end
下面是m文件
//
// AudioRecord.m
// audio #import "AudioRecord.h"
@implementation AudioRecord : NSObject +(AudioRecord *)shareAudioRecord{
static AudioRecord *sharedAccountManagerInstance = nil; static dispatch_once_t predicate; dispatch_once(&predicate, ^{
sharedAccountManagerInstance = [[self alloc] init];
});
return sharedAccountManagerInstance;
} /**
* 设置录制的音频文件的位置
*
* @return <#return value description#>
*/
- (NSString *)audioRecordingPath{ NSString *result = nil;
NSArray *folders = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsFolde = [folders objectAtIndex:];
result = [documentsFolde stringByAppendingPathComponent:@"Recording.aac"];
return (result); } /**
* 在初始化AVAudioRecord实例之前，需要进行基本的录音设置
*
* @return <#return value description#>
*/
- (NSDictionary *)audioRecordingSettings{ NSDictionary *settings = [[NSDictionary alloc] initWithObjectsAndKeys: [NSNumber numberWithFloat:44100.0],AVSampleRateKey , //采样率 8000/44100/96000 [NSNumber numberWithInt:kAudioFormatMPEG4AAC],AVFormatIDKey, //录音格式 [NSNumber numberWithInt:],AVLinearPCMBitDepthKey, //线性采样位数 8、16、24、32 [NSNumber numberWithInt:],AVNumberOfChannelsKey, //声道 1，2 [NSNumber numberWithInt:AVAudioQualityLow],AVEncoderAudioQualityKey, //录音质量 nil];
return (settings);
} /**
* 停止音频的录制
*
* @param recorder <#recorder description#>
*/
- (void)stopRecordingOnAudioRecorder:(AVAudioRecorder *)recorder{
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setCategory:AVAudioSessionCategoryPlayback error:nil]; //此处需要恢复设置回放标志，否则会导致其它播放声音也会变小
[session setActive:YES error:nil];
[recorder stop];
} /**
* @param recorder <#recorder description#>
* @param flag <#flag description#>
*/
- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:(BOOL)flag{ if (flag == YES) {
NSLog(@"录音完成！");
NSError *playbackError = nil;
NSError *readingError = nil;
NSData *fileData = [NSData dataWithContentsOfFile:[self audioRecordingPath] options:NSDataReadingMapped error:&readingError]; AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc] initWithData:fileData
error:&playbackError]; self.audioPlayer = newPlayer; if (self.audioPlayer != nil) {
self.audioPlayer.delegate = self;
if ([self.audioPlayer prepareToPlay] == YES &&
[self.audioPlayer play] == YES) {
NSLog(@"开始播放音频！");
} else {
NSLog(@"不能播放音频！");
}
}else {
NSLog(@"播放失败！");
} } else {
NSLog(@"录音过程意外终止！");
}
self.audioRecorder = nil;
} /**
* 初始化音频检查
*/
-(void)initRecordSession
{
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];
[session setActive:YES error:nil]; } /**
* 开始录音
*/
- (void)onStatrRecord
{ /**
* 检查权限
*/
if (![self canRecord])
{ [[[UIAlertView alloc] initWithTitle:nil
message:[NSString stringWithFormat:@"应用需要访问您的麦克风。请启用麦克风！"]
delegate:nil
cancelButtonTitle:@"同意"
otherButtonTitles:nil] show];
return;
} [self initRecordSession]; NSError *error = nil;
NSString *pathOfRecordingFile = [self audioRecordingPath];
NSURL *audioRecordingUrl = [NSURL fileURLWithPath:pathOfRecordingFile];
AVAudioRecorder *newRecorder = [[AVAudioRecorder alloc]
initWithURL:audioRecordingUrl
settings:[self audioRecordingSettings]
error:&error];
self.audioRecorder = newRecorder;
if (self.audioRecorder != nil) {
self.audioRecorder.delegate = self;
if([self.audioRecorder prepareToRecord] == NO){
return;
} if ([self.audioRecorder record] == YES) { NSLog(@"录音开始！"); [self performSelector:@selector(stopRecordingOnAudioRecorder:)
withObject:self.audioRecorder
afterDelay:10.0f]; } else {
NSLog(@"录音失败！");
self.audioRecorder =nil;
}
} else {
NSLog(@"auioRecorder实例录音器失败！");
}
} /**
* 停止录音
*/
- (void)stopRecord{ if (self.audioRecorder != nil) {
if ([self.audioRecorder isRecording] == YES) {
[self.audioRecorder stop];
}
self.audioRecorder = nil;
} if (self.audioPlayer != nil) {
if ([self.audioPlayer isPlaying] == YES) {
[self.audioPlayer stop];
}
self.audioPlayer = nil;
}
} /**
* 将要录音
*
* @return <#return value description#>
*/
- (BOOL)canRecord
{
__block BOOL bCanRecord = YES;
if ([[[UIDevice currentDevice] systemVersion] compare:@"7.0"] != NSOrderedAscending)
{
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
if ([audioSession respondsToSelector:@selector(requestRecordPermission:)]) { [audioSession performSelector:@selector(requestRecordPermission:) withObject:^(BOOL granted) { if (granted) { bCanRecord = YES; } else { bCanRecord = NO; } }]; }
}
return bCanRecord;
} @end
转载请注明：http://www.cnblogs.com/wangmars/ 以上也综合网上大牛的智慧
感谢http://www.cnblogs.com/hanjun/archive/2012/10/30/2747159.html顺便也解决了 录音后播放声音小的问题。