IOS-IOS录音功能的实现

这两天看了一下IOS的录音，，，参考了一下前辈们的帖子，点击打开链接

IOS的录音主要依靠AVFoundation.framework与CoreAudio.framework两个框架来实现。

工程里添加这两个框架。

#import "textViewController.h"
#import "RootViewController.h"
@interface textViewController (){
    NSURL *recordedTmpFile;
    AVAudioRecorder *recorder;
    NSError *error;
    BOOL toggle;
    BOOL isPlaying;
    AVAudioPlayer *avPlayer;
    UIAlertView *customAlert;
    NSInteger time;
    NSTimer *timer;
    NSMutableArray *myArray;
}
@property (weak, nonatomic) IBOutlet UITextField *textField;
@property (weak, nonatomic) IBOutlet UITextField *volume;
@property (weak, nonatomic) IBOutlet UILabel *timeLabel;
@property (weak, nonatomic) IBOutlet UIButton *luyinButton;
@property (weak, nonatomic) IBOutlet UIButton *playButton;
@property (weak, nonatomic) IBOutlet UIActivityIndicatorView *activityView;
@property (weak, nonatomic) IBOutlet UITableView *myTableView;

@implementation textViewController

- (NSString *)dataFilePath:(NSString *)name
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *folderPath = [paths objectAtIndex:0];
    return [folderPath stringByAppendingPathComponent:name];
}
- (NSString *)dataFilePathMP3:(NSString *)name
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *folderPath = [[paths objectAtIndex:0]stringByAppendingString:@"MP3/"];
    
    return [folderPath stringByAppendingPathComponent:name];
}



- (void)viewDidLoad {
    [super viewDidLoad];
    NSError *errorr;
    toggle = YES;
    isPlaying = NO;
    self.activityView.hidden = YES;
    AVAudioSession *audioSession = [AVAudioSession sharedInstance];
    [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:&errorr];
    [audioSession setActive:YES error:&errorr];
    
    timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(updateTime) userInfo:nil repeats:YES];
    [timer setFireDate:[NSDate distantFuture]];
    
    
    NSString *recordListPath = [self dataFilePath:@"recordList.plist"];
    if ([[NSFileManager defaultManager]fileExistsAtPath:recordListPath]) {
        myArray = [NSMutableArray arrayWithContentsOfFile:recordListPath];
    }else{
        myArray = [NSMutableArray arrayWithCapacity:0];
    }
    // Do any additional setup after loading the view from its nib.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (IBAction)luyin:(id)sender {
    
    if (toggle) {
        toggle = NO;
        NSError *error0;
        self.activityView.hidden = NO;
        [self.activityView startAnimating];
        [self.luyinButton setTitle:@"停止录音" forState:UIControlStateNormal];
    
        [timer setFireDate:[NSDate distantPast]];
        time = 0;
        //录音设置
        NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc]init];
        //录音格式
        [recordSetting setValue:[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
        //采样率：11025.0
        [recordSetting setValue:[NSNumber numberWithFloat:[self.textField.text floatValue]] forKey:AVSampleRateKey];
        //通道数
        [recordSetting setValue:[NSNumber numberWithInt:[self.volume.text intValue]] forKey:AVNumberOfChannelsKey]; 
        //线性采样位数
        [recordSetting setValue :[NSNumber numberWithInt:16] forKey: AVLinearPCMBitDepthKey];
        //音频质量,采样质量
        [recordSetting setValue:[NSNumber numberWithInt:AVAudioQualityMin] forKey:AVEncoderAudioQualityKey];
        
        NSDateFormatter *formatter1 = [[NSDateFormatter alloc] init];
        [formatter1 setDateFormat:@"yyyy_MM_dd_hh_mm_ss"]; //yyyy-MM-dd hh:mm:ss
        NSString *showtimeNew = [formatter1 stringFromDate:[NSDate date]];
        
        recordedTmpFile = [NSURL fileURLWithPath:[self dataFilePathMP3:[NSString stringWithFormat: @"%@.caf", showtimeNew]]];
        [[NSUserDefaults standardUserDefaults]setObject:showtimeNew forKey:@"name"];
        NSLog(@"using file called:%@",recordedTmpFile);
        recorder = [[ AVAudioRecorder alloc] initWithURL:recordedTmpFile settings:recordSetting error:&error0];
        [recorder setDelegate:self];
        [recorder prepareToRecord];
        [recorder record];
    }else{
        toggle = YES;
        self.activityView.hidden = YES;
        [self.activityView stopAnimating];
        [self.luyinButton setTitle:@"开始录音" forState:UIControlStateNormal];
        [recorder stop];
        
        [timer setFireDate:[NSDate distantFuture]];
        [[NSUserDefaults standardUserDefaults]setObject:self.timeLabel.text forKey:@"time"];
        
        customAlert= [[UIAlertView alloc]initWithTitle:@"请为您的录音文件命名加以保存" message:@"" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"保存", nil];
        customAlert.alertViewStyle = UIAlertViewStylePlainTextInput;
        UITextField *textField = [customAlert textFieldAtIndex:0];
        textField.text = [[NSUserDefaults standardUserDefaults]objectForKey:@"name"];
        [customAlert show];
    }
}


- (IBAction)play:(id)sender {
    NSError *error11;
    if (isPlaying) {
        isPlaying = NO;
        [self.playButton setTitle:@"开始播放" forState:UIControlStateNormal];
        [avPlayer stop];
    }else{
        isPlaying = YES;
        [self.playButton setTitle:@"停止播放" forState:UIControlStateNormal];
        NSLog(@"recordTmpFile---%@",recordedTmpFile);
        
        avPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:recordedTmpFile error:&error11];
        [avPlayer prepareToPlay];
        [avPlayer play];
    }
    
}

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
    if (buttonIndex==0) {
        [alertView dismissWithClickedButtonIndex:0 animated:YES];
        NSString *name = [[NSUserDefaults standardUserDefaults]objectForKey:@"name"];
        [[NSFileManager defaultManager]removeItemAtPath:[self dataFilePathMP3:[NSString stringWithFormat:@"%@.caf",name]] error:nil];
    }else if (buttonIndex==1){
        
        UITextField *textField = [customAlert textFieldAtIndex:0];
        
        NSString *name = [[NSUserDefaults standardUserDefaults]objectForKey:@"name"];
        if ([[NSFileManager defaultManager]fileExistsAtPath:[self dataFilePathMP3:[NSString stringWithFormat:@"%@.caf",name]]]) {
            [[NSFileManager defaultManager]moveItemAtPath:[self dataFilePathMP3:[NSString stringWithFormat:@"%@.caf",name]] toPath:[self dataFilePath:[NSString stringWithFormat:@"%@",textField.text]] error:nil];
        }
        
        NSString *recordListPath = [self dataFilePath:@"recordList.plist"];
        NSMutableArray *recordArray;
        if ([[NSFileManager defaultManager]fileExistsAtPath:recordListPath]) {
            recordArray = [NSMutableArray arrayWithContentsOfFile:recordListPath];
        }else{
            recordArray = [NSMutableArray arrayWithCapacity:0];
        }
        if (![recordArray containsObject:textField.text]) {
            [recordArray addObject:textField.text];
        }
        [recordArray writeToFile:[self dataFilePath:@"recordList.plist"] atomically:YES];
        myArray = [NSMutableArray arrayWithArray:recordArray];
        [self.myTableView reloadData];
    }
}

-(void)updateTime{
    time = time+1;
    self.timeLabel.hidden = NO;
    if(time>=3600){
        self.timeLabel.text=[NSString stringWithFormat:@"%02ld:%02ld:%02ld",(long)time/3600,(long)(time%3600)/60,(long)time%60];
    }else{
        self.timeLabel.text=[NSString stringWithFormat:@"%02d:%02ld:%02ld",0,(long)time/60,(long)time%60];
    }
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/
-(NSInteger )tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return [myArray count];
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *identifier = @"identifier";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:
                             identifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc]
                initWithStyle:UITableViewCellStyleDefault
                reuseIdentifier:identifier];
    }
    
    NSUInteger row = [indexPath row];
    cell.textLabel.text = [myArray objectAtIndex:row];
    return cell;
}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    return 50;
}

          

不过，我遇到一个问题，录音没问题，保存的文件都能找见，用电脑播放录音文件也没问题，但是用手机去播放录音文件就听不见声音，我怀疑是声音特别小才导致的听不见。。。不知道是不是 ，怎么样才能解决这种问题呢？