iOS录音及播放全解

//
//  ViewController.m
//  录音与播放
//
//  Created by 张璟冰 on 2020/3/29.
//  Copyright © 2020 张璟冰. All rights reserved.
//#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>
@interface ViewController ()<AVAudioRecorderDelegate>{UILabel *timeLabel;float time;//保存我们录音录了多久
}
@property(nonatomic,strong)AVAudioRecorder *audioRecorder;//录音器
@property (nonatomic,strong) NSString *mp3Path;
@property (nonatomic,strong) NSString *cafPath;
@property (nonatomic, strong) NSTimer *timer;//定时器
@property (nonatomic, strong) AVAudioPlayer *player; //播放器
@end@implementation ViewController
#pragma mark  第三步 录音器的懒加载
- (AVAudioRecorder *)audioRecorder
{if (!_audioRecorder){//7.0第一次运行会提示，是否允许使用麦克风AVAudioSession *session = [AVAudioSession sharedInstance];NSError *sessionError;//AVAudioSessionCategoryPlayAndRecord用于录音和播放[session setCategory:AVAudioSessionCategoryPlayAndRecord error:&sessionError];if(session == nil)NSLog(@"Error creating session: %@", [sessionError description]);else[session setActive:YES error:nil];//创建录音文件保存路径NSURL *url = [self getSavePath];//创建录音格式设置NSDictionary *setting = [self getAudioSetting];//创建录音机NSError *error=nil;_audioRecorder = [[AVAudioRecorder alloc]initWithURL:url settings:setting error:&error];_audioRecorder.delegate=self;_audioRecorder.meteringEnabled=YES;//如果要监控声波则必须设置为YES[_audioRecorder prepareToRecord];if (error){NSLog(@"创建录音机对象时发生错误，错误信息：%@",error.localizedDescription);return nil;}}return _audioRecorder;
}
/***  取得录音文件保存路径**  @return 录音文件路径*/
-(NSURL *)getSavePath
{//iPhone会为每一个应用程序生成一个私有目录，这个目录位于/user/.../Application下//并会随机生成一个数字字母串作为目录名//通常使用Documents目录进行数据持久化的保存//  在Documents目录下创建一个名为AudioData的文件夹、NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject] stringByAppendingPathComponent:@"AudioData"];NSLog(@"%@",path);NSFileManager *fileManager = [NSFileManager defaultManager];BOOL isDir = FALSE;BOOL isDirExist = [fileManager fileExistsAtPath:path isDirectory:&isDir];if(!(isDirExist && isDir)){BOOL bCreateDir = [fileManager createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];if(!bCreateDir){NSLog(@"创建文件夹失败！");}NSLog(@"创建文件夹成功，文件路径%@",path);}NSString *fileName = @"record";NSString *cafFileName = [NSString stringWithFormat:@"%@.caf", fileName];NSString *mp3FileName = [NSString stringWithFormat:@"%@.mp3", fileName];//拼接路径NSString *cafPath = [path stringByAppendingPathComponent:cafFileName];NSString *mp3Path = [path stringByAppendingPathComponent:mp3FileName];self.mp3Path = mp3Path;self.cafPath = cafPath;NSLog(@"file path:%@",cafPath);NSURL *url=[NSURL fileURLWithPath:cafPath];return url;
}
/***  取得录音文件设置**  @return 录音设置*/
- (NSDictionary *)getAudioSetting
{NSMutableDictionary *dicM = [NSMutableDictionary dictionary];[dicM setObject:@(kAudioFormatLinearPCM) forKey:AVFormatIDKey];
//    [dicM setObject:@(ETRECORD_RATE) forKey:AVSampleRateKey];[dicM setObject:@(2) forKey:AVNumberOfChannelsKey];[dicM setObject:@(16) forKey:AVLinearPCMBitDepthKey];[dicM setObject:[NSNumber numberWithInt:AVAudioQualityMin] forKey:AVEncoderAudioQualityKey];return dicM;
}
- (void)viewDidLoad
{[super viewDidLoad];UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 100, 100)];btn.tag = 10000;[btn setTitle:@"开始录音" forState:UIControlStateNormal];[btn setTitle:@"停止录音" forState:UIControlStateSelected];[btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];btn.backgroundColor = [UIColor whiteColor];[btn addTarget:self action:@selector(recordClick:) forControlEvents:UIControlEventTouchUpInside];[self.view addSubview:btn];UIButton *btn2 = [[UIButton alloc]initWithFrame:CGRectMake(120, 0, 100, 100)];btn2.tag = 10001;[btn2 setTitle:@"播放录音" forState:UIControlStateNormal];[btn2 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];btn2.backgroundColor = [UIColor whiteColor];[btn2 addTarget:self action:@selector(play:) forControlEvents:UIControlEventTouchUpInside];[self.view addSubview:btn2];//时间timeLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 200, 100, 30)];timeLabel.text = @"录音时长";timeLabel.font = [UIFont systemFontOfSize:16];timeLabel.textColor = [UIColor blackColor];[self.view addSubview:timeLabel];
}
#pragma mark 播放录音
-(void)play:(UIButton *)sender
{if ([self.player isPlaying])return;self.player = [[AVAudioPlayer alloc]initWithData:[NSData dataWithContentsOfFile:self.cafPath] error:nil];[self.player play];
}
#pragma mark 第四步 开始/结束录音点击、播放点击
-(void)recordClick:(UIButton *)sender
{sender.selected = !sender.selected;if (sender.selected){//开始录音[self startRecord];}else{//结束录音[self finishRecorded];}
}
//结束录音
- (void)finishRecorded
{//使用系统自带录音机if ([self.audioRecorder isRecording]){NSLog(@"完成");[self destoryTimer];[self.audioRecorder stop];//停止工作}if (time < 1){NSLog(@"录音时间过短!");//清空录音内容return;}//进行录音格式的转码成mp3格式、提交网络上传//Lametime = 0;timeLabel.text = @"点击录音";}
//开始录音
- (void)startRecord
{// 重置录音机if (self.audioRecorder){self.audioRecorder = nil;time = 0;[self destoryTimer];}if (![self.audioRecorder isRecording]){AVAudioSession *session = [AVAudioSession sharedInstance];NSError *sessionError;//AVAudioSessionCategoryPlayAndRecord用于录音和播放[session setCategory:AVAudioSessionCategoryPlayAndRecord error:&sessionError];if(session == nil)NSLog(@"Error creating session: %@", [sessionError description]);else[session setActive:YES error:nil];//创建定时器方法，实时计算录音了几秒钟self.timer = [NSTimer scheduledTimerWithTimeInterval:1target:selfselector:@selector(record)userInfo:nilrepeats:YES];timeLabel.text = @"00:00";[self.audioRecorder record];//开始工作NSLog(@"录音开始");}else{NSLog(@"is  recording now  ....");}}
//   定时器方法--录音时间计算
- (void)record
{time = time+1;timeLabel.text = [self timeFormatted:(float)time];//假如一次性只能录180s，一般写倒计时提示if (time == 180){NSLog(@"%@",@"最多仅能录取180s");//结束录音UIButton *btn = [self.view viewWithTag:10000];btn.selected = !btn.selected;
//        [self finishRecorded];//调用录音结束[self.timer invalidate];self.timer = nil;
//        _recordGIFImg.hidden = YES;//关闭GIF图，这个图是一个光播图标)))
//        [_recordGIFImg stopAnimating];}
}
- (NSString *)timeFormatted:(NSInteger)totalSeconds
{NSInteger seconds = totalSeconds % 60;NSInteger minutes = (totalSeconds / 60) % 60;NSInteger hours = totalSeconds / 3600;if (hours <= 0){return [NSString stringWithFormat:@"%02ld:%02ld",(long)minutes, (long)seconds];}return [NSString stringWithFormat:@"%02ld:%02ld:%02ld",(long)hours, (long)minutes, (long)seconds];
}//销毁定时器
- (void)destoryTimer
{if (self.timer){[self.timer invalidate];//使其无效self.timer = nil;//置空NSLog(@"----- timer destory");}
}
@end

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