录音简单使用

#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>

@interface ViewController ()<AVAudioPlayerDelegate>

@property (nonatomic,strong) NSURL *recordedFile;

@property (nonatomic,strong) AVAudioRecorder *recorder;

@property (nonatomic,strong) AVAudioPlayer *play;

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];

// 临近状态检测

bool proximityState = [UIDevice currentDevice].proximityState;
NSLog(@"------->%d",proximityState);

UIDevice *device = [UIDevice currentDevice];
device.proximityMonitoringEnabled = YES; // 允许临近检测
if (device.proximityMonitoringEnabled == YES ) {

// 临近消息触发
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(proximityChanged:) name:UIDeviceProximityStateDidChangeNotification object:device];
}

// 设置好文件的存储位置
NSFileManager *manager = [NSFileManager defaultManager];

NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *path = [pathArray lastObject];
path = [path stringByAppendingPathComponent:@"RecordedFile"];

bool existsFlag = [manager fileExistsAtPath:path];
if (!existsFlag) {

bool isSuccess = [manager createFileAtPath:path contents:nil attributes:nil];

if (isSuccess) {
NSLog(@"创建成功");
}else{
NSLog(@"创建失败");
}
}

_recordedFile = [NSURL fileURLWithPath:path];
AVAudioSession *session = [AVAudioSession sharedInstance];
NSError *error;

// 开启录音和播放功能
[session setCategory:AVAudioSessionCategoryPlayAndRecord error:&error];

if (session == nil) {
NSLog(@"session is error ---->%@",error.description);
}else{
[session setActive:true error:nil];
}
}

- (void)proximityChanged:(NSNotification *)notification{

// 如果此时手机靠近面部， 声音从听筒出来， 屏幕变暗
if ([UIDevice currentDevice].proximityState == YES) { // 接近耳朵

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];

}else{

// 没有黑屏的话， 就直接开扬声器。
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
}
}

- (IBAction)recordAction:(id)sender {

// 先设置播放和录音状态
[[AVAudioSession sharedInstance]setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];

// 初始化录音
_recorder = [[AVAudioRecorder alloc]initWithURL:_recordedFile settings:nil error:nil];

// 准备录音
[_recorder prepareToRecord];

// 开始录音
[_recorder record];

NSLog(@"开始录音.....");
}

- (IBAction)stopAction:(id)sender {

[_recorder stop];

_recorder = nil;

NSLog(@"结束录音......");

NSError *error;
_play = [[AVAudioPlayer alloc]initWithContentsOfURL:_recordedFile error:&error];
if (_play == nil) {
NSLog(@"error is --->%@",error.description);
}
_play.delegate = self;
//设置从扬声器播放
[[AVAudioSession sharedInstance]setCategory:AVAudioSessionCategoryPlayback error:nil];
}

- (IBAction)playerAction:(id)sender {

if ([_play isPlaying]) {

[_play pause];

}else{

[_play play];

}

}

- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{

NSLog(@"播放完成");

}

@end