爱站程序员基地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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